How to control aphids now and forever

Aphids are common in almost any growing system, traditional soil, greenhouse, or indoor farm. It’s very hard to keep them out. One way or another, they get into your greenhouse – and when they do, they spread quickly, damaging crops and spreading disease.

Because they reproduce and spread so quickly, growers should have an initial control ready to go, and then follow up with a long term control plan. It also means that as soon as you notice them, aphids are a problem. Don’t wait until they are bad to control them!

How to deal with aphids: initial reaction
Here are your options:
  • Soap controls are typically very safe, but they can’t be used alone.
  • Biological sprays like Mycotrol and Botanigard, which both use strains of the fungus Beauveria bassiana are both safe controls. Azadirachtin is another compound in sprays like Azatrol that uses a product of neem oil.
  • Pyrethrin products like Pyganic are pretty effective.
  • You can use some “big guns” like Marathon, which is a systemic pesticide that will knock out aphids like nobody business. If you do this, you MUST check to make sure that: it’s legal in your area, and you have diligently read the label and followed all instructions there.
Read more at Upstart University

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