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Crop protection

Coordinated defence against Australia's most threatening plant disease

Wine Australia and Hort Innovation have teamed up through the Plant Biosecurity Research Initiative (PBRI) to safeguard the nation against a devastating bacteria that could cripple the country’s multi-billion dollar wine and horticulture sectors. Xylella fastidiosa is an exotic bacteria that prevents a plant from…

Gowan USA introduces EcoSwing

US: Commercial launch of new botanical fungicide

Gowan USA announces the commercial launch of EcoSwing, an innovative botanical fungicide. EcoSwing is a liquid botanical fungicide based on the extract of Swinglea glutinosa,…

2018 Update

UK: Practical weed control for nursery stock

This AHDB guide is intended to summarise information on weed control in nursery stock in an easy-to-use format. It should provide both a quick guide to formulating weed control programmes as well as providing more in-depth reference data. The 2013 update for the practical weed control for nursery stock explores achieving…

Combating root-knot nematodes in daylilies: Experimental results

While most of the 25,000 species nematodes found in soils are beneficial, there are a few parasitic species that can cause crop losses. Northern root knot nematode, Meloidogyne hapla, is a major pest of some field-grown herbaceous perennials, such as Hemerocallis, daylilies (Fig. 1). The feeding of the…

Canadian Plant Health Council launched

Collaboration between Canadian governments, industry, academia and other partners in plant health is essential to protect our resources from new and emerging risks, drive innovation and ensure that Canadian industry remains competitive and sustainable. Plant health partners in Canada are pleased to announce the establishment…

How France takes action against xylella fastidiosa

Xylella fastidiosa was identified for the first time in Europe in 2013; since then the bacterium has been ranked as a top plant health priority by the European Union and has been a concern in many countries, including France. Using insects as vectors, the bacterium attacks many different plants (over 360 host species…

Australia: Levy projects improving industry protection from pests and disease

Biosecurity is one of the key areas of levy R&D investment for the nursery industry because protecting industry assets from exotic, emerging and endemic pests and diseases is of utmost importance. Currently, there are several nursery biosecurity projects underway. In this blog, we look at recent project updates, resources…

UK: Linuron replacement for ornamental bulb growers

The withdrawal of linuron earlier this year left a large gap in weed control options for many growers, including ornamental bulb growers. As metobromuron has shown to be a reliable alternative to linuron, the AHDB Minor Use team has worked closely with Belchim and CRD (Chemicals Regulation Division) to successfully deliver…

Nematodes in ornamental plant production: Good or bad?

Did you know nematodes are the most abundant animals on earth? Nematodes are microscopic round worms that are extremely common in soils. There are over 25,000 species of nematodes, most of which are considered to be beneficial and feed on bacteria, fungi or insect larvae. The beneficial characteristics…

UK: Defra approves sale of Sequoia for use only in greenhouses

Defra has approved a request from Dow AgroSciences Ltd to sell the pest control product Sequoia in the UK for use only in greenhouses. Sequoia contains the active ingredient…

CAN (ON): Biocontrol big for flower growers

More greenhouse growers are buying into biocontrol thanks largely to the work of a team of Vineland researchers. Ask one of them, though, and she’ll give credit elsewhere for an uptick in more ornamental flower growers using living organisms instead of chemicals to control pests and disease. Rose Buitenhuis, Vineland’s biological control research scientist…

Modified formulation for Macro-Mite

Koppert Biological Systems has developed a new formulation for Macro-Mite, which boosts the vitality of the Macrocheles robustulus predatory mite. Macro-Mite is an effective natural enemy for the control of soil-dwelling pests, like eggs, larvae and pupae of sciarid flies, thrips pupae, and Lyprauta larvae. Modified formulation…

CAN (ON): Which thrips are in your flower crops: When paradigms shift

Up until this point, most of Ontario floriculture growers assumed the only pest thrips they were dealing with was Western flower thrips (besides Echinothrips in a few crops…

US (LA): Field day highlights landscape management, insects, diseases

More than 180 landscapers and others involved in the green industry heard about the management of pest and diseases during the annual Landscape Horticulture Field Day at the LSU AgCenter Hammond Research Station on Oct. 4. The field day is designed to provide the latest research-based information to landscape industry professionals,…

CAN (BC): Hand in your unwanted crop protection products free of charge

Farmers living in or near 10 BC Interior communities will be able to dispose of unwanted agricultural pesticides and outdated livestock medications that have accumulated at their farms at special collection events that are being held at designated locations beginning Monday, October 15. The events have been organized…

October 23, Stratford-upon-Avon

UK: Improving the application of biopesticides to ornamental crops

An AHDB workshop at Bordon Hill Nurseries will identify practical ways for growers to improve the performance of biopesticides when used commercially in crop protection programmes. It is an opportunity for growers of ornamental crops to learn more about a number of important factors that need to be considered when selecting,…

Koppert and CABI collaborate on making more biological controls available

Following earlier collaboration in Kenya in March this year in which CABI and the Koppert Foundation stepped up their efforts to combat pests which threaten the food security and livelihoods of thousands of farmers and their families, the two companies signed a new agreement. Under the agreement, more…

HTA:

"Belgian xylella interception does not affect the UK market currently"

The Belgian Nurseryman and Growers Federation (AVBS) has reported that Xylella fastidiosa was found at a trading company in West Flanders on 26 September, the first time the bacterial pathogen has been identified in Belgium. Although the Belgian interception does not affect the UK market currently, HTA members still…

US (MN): New Emerald Ash Borer and Palmer Amaranth finds

On September 13, 2018, the Minnesota Department of Agriculture (MDA) announced the discovery of a new emerald ash borer (EAB; Agrilus planipennis) infestation in Wright County…

Xylella found in Belgium

In Belgium Xylella fastidiosa is discovered for the first time. According to the AVBS, the association for Flemish floriculture, it was a detection in a batch of olive trees from Spain. These showed suspicious symptoms. Laboratory research showed that the plants were infected. The infected plants have been destroyed. The supplier decided to…

US: BASF’s Inscalis insecticide receives EPA registration

BASF received the U.S. Environmental Protection Agency (EPA) registration for its Inscalis insecticide. The new insecticide controls piercing-sucking insect pests in a variety…

Asperello T34 Biocontrol awarded with Retailers’ Choice Award

Every year, the Biobest North America team meets up in Columbus, Ohio in July for the largest ornamental trade show of the year, Cultivate. Cultivate provides opportunities for the Biobest team to network, to learn from others in the industry and to teach others about biological control agents and the…

The 'tipping point' for whitefly control in poinsettia

If you started out using biological control in your Poinsettia crop this year, you’ve now reached the crucial tipping point for whitefly control decisions. Based on the size of your whitefly population in mid-late September, your populations could end up too high by November to effectively control. Ultimately, this could…

Kenya: "Measures in place to deal with chemical poisoning cases"

The Kenya Flower Council (KFC), the lobby group for the flower industry in Kenya, recognises that chemical poisoning is still a concern for the sector, but says it has put in place various measures to deal with the cases. “The Kenya Flower Council Standard has provided requirements that are adhered to by the producers…

US (NY): Cornell Botanic Gardens wins grant to make plant records accessible

Cornell Botanic Gardens has received a $192,000 grant from the federal government’s Institute of Museum and Library Services in support of a $384,000 project to upgrade and digitize its plant collections records. The grant will enable the Botanic Gardens to transfer its plant records system to a more…

US: OHP set to launch Fortress herbicide

OHP announces the federal registration of Fortress Ornamental Herbicide, a pre-emergent granular product that provides control of broadleaf and grassy weeds. Fortress provides exceptional weed control without harming sensitive plants such as perennials and grasses and may also be applied to woody ornamentals. "Fortress has…

How seed-feeding flies are threatening five orchid species

What’s eating these endangered orchids?

A species of seed-feeding fly is critically damaging the seed production of multiple orchid species, as revealed by a group of Japanese researchers. If the damage caused by this fly is occurring long-term and across Japan, these already-endangered orchid species could become unable to reproduce using…

US: Deadly plant disease threatens $250M rose business

The outlook for American-grown roses is becoming a bit less rosy, with the spread of an incurable virus that’s causing major damage to the nation’s $250-million-a-year rose business. U.S. rose bush producers account for the bulk of that business and face a growing challenge from rose rosette disease, which can kill…

New research paper uncovers interaction Xylella fastidiosa and its diverse hosts

The plant pathogenic bacterium Xylella fastidiosa occurs widely and often asymptomatically, yet it is associated with a few seriously bad disease outbreaks, the most recent affecting olive trees in southern Italy and adjoining regions. It also is the causal agent of Pierce’s Disease of grapevine, citrus…

Is pollution killing a flower’s scent?

Would a fresh bouquet of flowers lose its appeal if it didn’t smell? Or what if you could no longer buy your favorite perfume? Find out why scientists are studying how pollution is interfering with flowers’ scents. “I've always loved plants. I love flowers in particular; I love smelling them. I'm also really interested in…

Mexico: Sterile insect technique curtails pest threat to Opuntia cactus

When a cactus moth lays its eggs on an Opuntia cactus, it creates one of nature’s most effective camouflages. The eggs emerge as what is called an “egg stick”, because they look like the cactus spine. The problem is that when the larvae emerge from the dozens of eggs that make up the egg stick, they…

NL: First Honey Highway created around Schiphol

On Wednesday 5th September, directors Adnan Tekin and Joost Wagemakers of Stichting Leefomgeving Schiphol, together with Harry Brockhoff and Marcel Zandvliet of Dutch Flower Group, enthusiastically scattered flower seeds along the Legmeerdijk, which borders the VBA-Zuid business park. Next spring, this…

US (NY): New Plant Sciences majors battle invasive plants

The honeysuckle, barberry and multiflora rose in the Henry A. Smith Woods in Trumansburg, N.Y., were quaking in their boots September 6. The reason? New Plant Sciences majors enrolled in Collaboration, Leadership, and Career Skills in the Plant Sciences (PLSCI 1110) spent the afternoon roguing out these…

US (AR): Oxygen's role in plant self-defense

Research into how plants combat aphid attack using a reactive form of oxygen has earned Hillary Fischer, an Arkansas entomology doctoral student, honors from the Entomological…

EU: Xylella host plant database updated

EFSA has completed two pieces of work that substantially expand knowledge and understanding of Xylella fastidiosa, the plant pathogen that is attacking fruit trees and other plants in parts of Europe. The agency has published the latest update of its database of plants that act as hosts for X.…

The dodder you never wanted

Dodder, a parasitic vining plant, is an uncommon greenhouse weed that survives off plants and can rapidly grow infesting multiple plants to whole crops. Figure 1. Greenhouse-grown fall garden mums parasitized with field dodder. Field dodder has a spaghetti-like appearance with pale green, yellow, or orange tendrils that wrap…

NZ: Myrtle rust detection programme wound down

Biosecurity New Zealand has stopped its myrtle rust surveillance programme and staff have been laid off or re-assigned by contractor AsureQuality. Officials are now focusing on long term management of the plant disease, which was first detected on the mainland in a Kerikeri nursery in April last year.…

Greenhouse growers, are you ready for thrips?

As greenhouse producers are preparing for spring and the flowers become more numerous, it is time to get ready for those dreaded thrips. Well over a dozen species of thrips feed on greenhouse crops, with the most important species being the western flower thrips, Frankliniella occidentalis. Adult thrips…

"Don't miss this step"

Improve weed control in your nursery

Look, a lot of you apply granular pre-emergent herbicide with a spreader, whirly-bird, whatever you call it. When you make this application you apply it to the plants and simultaneously the groundcover, as a way to not only control weeds on the media surface in the pots, but also as a way to achieve weed…

New Zealand: Camellia growers use science to combat fungal disease

A fungal invader is making a serious dent in the quality of their blooms, but camellia fanciers are fighting back. Around 40 per cent of entries at the national camellia show in New Plymouth on Saturday were showing signs of the brown spots caused by petal blight, a fungal disease. Many of the flowers…

Rose disease makes its way to North Louisiana

Roses. They come in many shapes, colors and sizes. But one of the more popular super plants known as the knockout rose has taken a sucker punch with the dreaded rose rosette disease. “We knew it was coming. We have been actually seeing some customers with signs of it but it is such a serious disease that…

First report of Diplodia sapinea on Cedrus libani in Turkey

Cedar of Lebanon (Cedrus libani) is an ecologically and economically important conifer with a natural distribution in southern Turkey. Currently, no serious diseases affect C. libani in its native range, although it is susceptible to pathogens such as Heterobasidion annosum and Diplodia pinea in…

"Intelligent Sprayer: commercialization approved"

At long last, commercialization of the smart sprayer technology is moving forward. USDA ARS and Smart Guided Systems, Inc. announced finalization of a licensing agreement in…

National Geographic Xylella fastidiosa report

Italy's olive trees are dying. Can they be saved?

We've heard talk on the Xylella fastidiosa creating havoc around Italy and other countries. Olive trees are dying, other crops like vines and lavender (and about 300 more) are also affected and in a number of other Southern European countries the decease had been detected. At the same time Northern…

Controlling basil downy mildew might be as simple as turning on a light

The use of supplemental light to control downy mildew on food and ornamental crops could be integrated into current disease management practices. Downy mildew is a major disease on both ornamental and food crops. Whether these crops are grown outdoors or in a controlled environment, environmental…

Kenyan stakeholders want repeal of 16% VAT on pest control products

Stakeholders in the agriculture industry have criticized the government's move to impose 16 per cent tax on agricultural pest control products. The six companies are now…

First report of Rose yellow vein virus in Turkey

Rose (Rosa damascena) is grown as an ornamental plant in every region of Turkey and in some provinces it is also grown for production of essential oil. However, virus diseases affecting roses in Turkey have not been well characterised. Rose yellow vein virus (RYVV), has not been reported from Turkey. The…

New insights in cell death in plants might generate new leads for weed control

Some plants like the giant sequoia trees can grow into the “Largest Living Things on Earth”. Ironically, most of a tree’s biomass is actually not alive, but is formed by persistent cell corpses that are collectively called wood. Wood development is terminated by a tightly controlled cell death process of…

Gibraltar monitors spread of xylella

The Department of the Environment, Heritage and Climate Change of Gibraltar is closely monitoring the recent discovery of the bacterium Xylella fastidiosa on Myrtle-leaf Milkwort Polygala myrtifolia plants in Andalucía, Spain. Although no trees appear to be affected in Gibraltar, officials are placing…

Canada: Rootshield Plus WP registered for ornamentals

Flowers Canada Growers announces that Rootshield Plus WP was recently approved for uses on greenhouse and outdoor ornamentals. "We would like to extend our sincere thanks to Bioworks for bringing this product to ornamental farmers in Canada!" the organization states in a press release. Rootshield Plus WP…

US: OHP receives OMRI for Pycana Insecticide/Miticide

OHP announces the new biosolution Pycana Insecticide/Miticide has received OMRI (Organic Materials Review Institute) listing. According to its website, OMRI features the most…

Australia: Investment boosts disease-resistant crop technology

Farmers across the world could soon access disease-resistant crops using technology discovered by researchers from The University of Queensland after Brisbane start-up Nexgen Plants secured $3 million in investor backing. The Australian biotech company, launched by UQ’s commercialisation arm UniQuest in…

UK: Withdrawal dates confirmed for neonicotinoids

On 27 April 2018, the UK's Standing Committee on Plants, Animals, Food and Feed voted to adopt restricting the three neonicotinoid active substances: imidacloprid, clothianidin and thiamethoxam to greenhouse use only. All outdoor use, including seed treatment, will be banned after 19 December 2018. The…

UK: Viruses found in dahlia plants

Dahlia latent viroid (DLVd) (Hostuviroid, Pospiviroidae) is a recently discovered viroid of dahlia (family Asteraceae) (Verhoeven et al., 2013). Surveys in both The Netherlands and Japan found the viroid to be widespread in both field- and pot-grown dahlia. No other natural host of this viroid has been…

US: Partnership to bring growers biologically-based IPM

BioBee Biological Systems, headquartered in Sde Eliyaho, Israel, is at the forefront of implementing biologically-based integrated pest management (IPM) solutions in controlled environment agriculture and open-field production systems. BioBee USA, a subsidiary of BioBee, headquartered in Atlanta, Ga.,…

Reports of purple leaf spot of carnation in Japan

Carnation (Dianthus caryophyllus) is an economically valuable cut flower in Japan. In late March 2016, leaf spots of carnation (cv. Konoha) were detected in a greenhouse in Chiba, Japan. Leaf spot symptoms appeared as brown or purple spots with concentric rings c. 5-10 mm in diameter on the upper leaves…

US: Still a lot unclear surrounding chlorpyrifos ban

The U.S. 9th Circuit Court of Appeals has ordered the EPA to remove chlorpyrifos from sale in the U.S. within sixty days. This ruling applies to all cropping systems and all…

US: Rose rosette disease confirmed in north Louisiana

New reports of rose rosette disease were recently confirmed in commercial landscapes in the Shreveport and Bossier City area. It is a devastating disease of roses and was first confirmed in Louisiana during fall 2015, said LSU AgCenter plant doctor Raj Singh. All rose cultivars are susceptible, including…

Canada to phase out outdoor use of two neonicotinoid pesticides

Health Canada’s Pest Management Regulatory Agency is proposing to cancel all outdoor uses of clothianidin and thiamethoxam. According to Health Canada, the two neonicotinoid…

New Zealand: Successful partnership prevented establishment of new pest

MPI and affected industry GIA partners including TomatoesNZ have agreed to “stand down” the Poinsettia Thrips (Echniothrips americanas) investigation, after surveys found no further specimens. The “Unwanted Organism” was discovered in August 2017 in one Auckland greenhouse. This species of Thrips can…

Ethiopia: IPM technical committee for horticulture sector established

A workshop on Integrated Pest Management (IPM) technical committee establishment for commercial horticulture crops (CHCs) was held on July 31, 2018 at Capital Hotel; with the objective to promote IPM in more practical ways within the horticulture sector in Ethiopian agriculture. Ethiopian Horticulture…

"15 percent of pesticide products in Kenya are fake"

Farmers in Kenya are exposed to counterfeit pesticide products that are rampant in the market. This is according to Patrick Amuyunzu, Chairperson of the Agro-chemical Association of Kenya (AAK). AKK estimates that the country loses between 100-120 billion annually from the trade of counterfeit pesticides…

UK: SCEPTREplus delivers new biopesticide

Protected ornamental growers in the UK now have access to a new biopesticide, FLiPPER, for the control of a range of pests. The authorisation for the product was sought by AHDB’s Minor Use team, in collaboration with Alpha Biocontrol and Fargro, following successful performance within SCEPTREplus, the…

US (MA): Fusarium wilt of chrysanthemum

Fusarium wilt of chrysanthemum was diagnosed in the UMass Extension Plant Diagnostic Lab. Chrysanthemums infected with Fusarium show symptoms of wilting and dieback, often on one side of the plant. Discoloration of the vascular system is often observed when the base of the stem is cut open. Fusarium wilt…

US (CA): Chlorpyrifos use down in Santa Barbara County

A comprehensive risk assessment of chlorpyrifos, a broad-spectrum pesticide used to eliminate pests from a variety of crops including many grown in northern Santa Barbara County, ended July 30 with the recommendation that the California Department of Pesticide Regulation (DPR) list the compound as a…

NL: Every day fresh predatory mites in the crop with Bugline 2.0

"The biggest advantage of the Bugline is an optimal spread of the predatory mites. Based on washes we count about 15 or 16 predatory mites per branch." That is what is told by Rick van der Lugt, manager at one of the two cultivation locations of chrysanthemum grower VDL Fleurs, in the video below. The…

India: First whitefly attack on crops in Assam

Whitefly attacks have been reported in several villages of the Kamrup district in India, with agriculture scientists claiming it to be the first such phenomenon in the State…

US (MI): Pest management in fall aster production

The dog days of summer are here! We typically use that term to describe the time around late July and early August when daytime temperatures are the hottest of the year. This year, early July in southwest Michigan was scorching hot with temperatures a full 10 degrees Fahrenheit above average (or more!)…

US: Insect solutions guides available for ornamental growers

Syngenta has released three insect solutions guides to help greenhouse and nursery growers manage resistance while controlling whiteflies, thrips and aphids. The guides include susceptible crops, insect lifecycle details, as well as proven cultural and chemical recommendations for insect prevention and…

New production site enables rapid response for gall midge demand

Aphidoletes aphidimyza is a key weapon in aphid pest control. This tiny gall midge is positively thriving at Biobest’s new state-of-the-art production site in Morocco, leaving the group well placed to respond to any surge in demand for this natural enemy. The new 2000 m 2 production facility opened in…

Cool night temperatures induce crown buds in garden mums

Outdoor production of garden mums exposed to several cool nights of temperatures below 60 degrees Fahrenheit induce premature bud formation or crown buds. Figure 1. Crown buds in outdoor garden mum production. All photos by W. Garrett Owen, MSU Extenson. Light and temperature influence plant growth and…

UK: Ash dieback found on three new host species of tree

The Forestry Commission is urging industry to be vigilant for signs of ash dieback on new tree and shrub species and report suspected sightings through its Tree Alert reporting system. The call comes after three new tree and shrub species in the same family as ash (Oleaceae) tested positive for ash…

Erik Mooij:

"Application of Serenade on roses depends on circumstances"

"Serenade is not a universal mildew agent that’s suitable for all rose companies. For that it lacks working duration. But here at this company - where the Avalanche variety is grown exclusively in rather damp greenhouses - it fits very well and we achieve excellent results with it. So it really depends…

Pac O is the new name for OHP Plant Growth Regulator

OHP is changing the name of its paclobutrazol-based plant growth regulator (PGR) to Pac 0, effective immediately. Formerly known as Paczol, Pac O contains the same active ingredient (AI), same AI concentration (0.4%), same gallon size, and identical use rate recommendations. Users should be aware that…

UK: New tool against thrips in protected ornamentals

Thrips provide a year-round threat for protected ornamental growers, causing damage and loss of saleable crops. However, a new biorational insecticide based on a botanical extract from neem trees (Azadirachta indica) is set to offer growers another tool in the armoury against the pest. Azatin is a new…


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