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Crop protection


How the bumblebee coincidentally saved the greenhouse industry

Bumblebees, beneficial insects and mites are probably the most loyal residents of a grower's greenhouse. But having them around is not all as natural as you think. Did you know that it was by a coincidence that a Belgian veterinarian discovered the power of bumblebees for greenhouse pollination? It was a.....

US (OR): Controversy and innovation for nursery growers

Nursery industry authority, Dr. Heinrich Löesing, will conduct two key seminars, sponsored by J. Frank Schmidt and Sons Co., at Farwest 2017 with special relevance for producers of hardy nursery stock. The Farwest Show takes place August 23-25, in Portland, OR.Traveling from Germany, Dr. Löesing will shed.....

Probiotics may help bees survive crop protection exposure

In a new study from Lawson Health Research Institute (Lawson) and Western University, researchers have shown that probiotics can potentially protect honey bees from the toxic effects of pesticides.Honey bees are critical to agriculture as they pollinate approximately 35 per cent of the global food crop,.....

Christmas in July: tips for controlling whitefly in poinsettia

Poinsettias cuttings are here! Unfortunately, they will likely arrive with unwanted “presents” in tow. This includes Bemisia whitefly, a pest that can be hard to control with natural enemies and can ALSO be resistant to pesticides. So what’s a grower to do? By implementing some preventative measures RIGHT.....

ELO, ENZ, ZVG, Copa and Cogena voice concern

“IAS Committee ill informed on banning Alien Species”

Together with ELO, ENA, ZVG, Copa and Cogeca expressed their concerns about the EU Invasive Alien Species (IAS) Committee vote on adding species to the EU list on IAS, warning that the socio-economic impact of this has not been properly assessed.The EU Regulation on Invasive Alien Species (IAS) aims to.....

September 25-October 20

University of Florida offers online weed management course

Join the 488 growers who have successfully graduated from Greenhouse Training Online courses offered by the University of Florida IFAS Extension (UF). This intermediate course is designed for growers with some experience and training. The course is offered in English and Spanish. Manage all aspects of weed.....

"Diagnostics and knowledge of bacteria needed to prevent spread of diseases"

Agricultural and horticultural crops worldwide are threatened by various diseases, from which several important ones are caused by bacteria. Bacterial infections can result in a great variety of symptoms such as wilting, leaf spot, cankers and bacterial rot.Bacterial diseases are feared especially by.....

USDA gets serious about saving bees

Pollinators are a vital part of agricultural production. In the United States, more than one-third of all crop production – 90 crops ranging from nuts to berries to flowering vegetables - requires insect pollination. Managed honey bee colonies are the country's primary pollinators, adding at least $15.....

New Zealand: "No significant change to myrtle rust spread"

The total number of properties infected with myrtle rust in New Zealand is 52 nationally. 39 in Taranaki, 4 in Northland, 7 in Bay of Plenty and 2 in Waikato.Ministry for Primary Industries (MPI) Incident Controller David Yard says there has been no significant change to the spread of myrtle rust, but work.....

June 20-21, Stoneleigh Park

UK: Hort Science Live 2017 to showcase latest production innovations

IPM in the root zone, a holistic approach to pre-empting nutrient deficiencies and the management of air filled porosity in growing media are just three of the practical subjects being explored at the new Hort Science Live event next month.Created by ICL and Bayer, Hort Science Live 2017 is being hosted by.....

Koppert improves biological control of thrips

A newly patented sachet for the predatory mite Amblyseius swirskii now makes it possible to combat thrips infestations more efficiently than ever. Developed by Koppert Biological Systems, the Ulti-Mite Swirski breeding system is strongly resistant to both low and high levels of humidity, making the system.....

Altus insecticide focus for Bayer at its first Cultivate show

Environmental Science, a business unit of the Crop Science division of Bayer, will focus on providing growers with education and information about Altus insecticide at Cultivate ’17, held July 15-18 in Columbus, Ohio. Altus insecticide, which launched in May, introduces a new active ingredient,.....

New Zealand: New funding takes the fight to myrtle rust

Plant & Food Research and Scion have been successful in the latest round of MBIE’s Catalyst Strategic Fund with a project addressing the threat of myrtle rust to New Zealand. The project has three key aims: to establish the susceptibility of key species to myrtle rust, build scientific knowledge for.....

UK: Garden centre plants may pose pesticide threat to bees

Plants sold at UK garden centres are tainted by a cocktail of pesticide residues, a study has found. The mix included neonicotinoid pesticides, some of which are banned on bee attractive crops in the EU. The authors report that gardeners could be contaminating their gardens with pesticides harmful to.....

The ideal trap for pest insects

Trap systems for catching insects in greenhouses and in the field are not as effective as they should be. The probable cause is that insects cannot see the current designs very well and do not land directly on these traps. Basic research is underway to pave the way for more effective trap systems and less.....

by Mary Hausbeck

Pythium root rot on ornamentals

Pythium crown and root rot is a common and persistent disease in the greenhouse industry. This water mold can “nibble” the feeding roots of plants, resulting in stunted growth and delayed flowering (Photo 1). Pythium can also cause severe symptoms, such as crown rot, that can result in plant death (Photos.....

Huub Winters, Biopol:

"Fight against thrips is not only won above ground"

Thrips is a troublesome pest, which often affects many crops including chrysanthemum cultivation. The combating of thrips is currently being carried out by many growers above ground in the crop.Huub Winters, of Biopol: "The fight against thrips is quite difficult, but is this really so? It's all about.....

Scientists identify mutation that causes white spots

Garden and potted plants with white spots on their leaves are so popular that they are specially selected for this feature. An international research team has now identified a new mutation in the plant Lotus japonicus which gives leaves their white spots. These results could be important for the improvement.....

François Nsenga, Ninaf: "Not all flowers are ornaments"

Organic crop protection to become Rwanda's niche?

"Rwanda should not want to produce the same products as Kenya or Ethiopia. We need to develop a niche market", says Rwandan product developer, François Nsenga of Ninaf Ltd. In order to discover such a market, Nsenga is continuously testing products on his plot in Kigali. Currently, he is busy with growing.....

by Mary Hausbeck, Blair Harlan and Sheila Linderman

Thielaviopsis root rot on ornamentals

While root rots caused by Pythium and Rhizoctonia commonly occur among greenhouse ornamentals, black root rot is an important and serious threat to pansies (Photo 1), petunias (Photo 2) and vinca. Black root rot is caused by the fungus Thielaviopsis (Photo 3), and may also infect cyclamen, calibrachoa (Photo.....

by A. Karanfil and S. Korkmaz

First report of Hibiscus chlorotic ringspot virus in Turkey

Hibiscus rosa-sinensis (rose of China) is an ornamental plant grown throughout the tropics and subtropics, and under glass in more temperate areas. It is commonly used in landscape design; however, pathogens causing diseases on H. rosa-sinensis are not well described, especially in Turkey. Hibiscus chlorotic.....

by Mary Hausbeck

Botrytis blight on ornamentals

Botrytis cinerea is a fungus that infects many greenhouse ornamental and vegetable crops. Botrytis causes leaf spots (Photo 1), blighting (Photos 2-5), stem cankers and damping-off. Botrytis produces large masses of gray conidia or spores (hence the name “gray mold”) that can be carried on air currents to.....