Microbial control agents- aka MCA's, are an effective and available alternative to conventional pesticides. Another essential tool in your toolbox for the reduction of insect pests, disease, and disorders.
Products for a variety of pest pressures- MCAs have been developed for a number of pest problems including, but not limited to; caterpillars, fungus gnats, aphids, thrips, phytophagous mites, and diseases such as powdery mildew and fusarium.
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Dipel DF
Active ingredient: Bacillus thuringiensis, subsp. kurstaki, strain ABTS-351
Target pest: Caterpillars (larvae) of lepidopterous insects such as Corn Earworm, Cotton Bollworm, Cutworm, and more. See the full list here.
How does it work?
Bacillus thuringiensis is ingested by the caterpillar and attaches to the lining of the caterpillar's digestive system. Once infected, the pest will stop feeding in about an hour, and die within 3 days.
When should I use it?
Dipel DF should be used soon after monitored moth flights, or during times when caterpillars are feeding on the foliage.
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Fungal and bacterial pathogens
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CEASE
Active ingredient: Bacillus subtilis strain QST 713
Target pest: Fungal pathogens such as Botrytis spp. and Powdery Mildews, and bacterial diseases caused by Pseudonomas and Xanthomonas spp.
How does it work?
CEASE controls the growth of certain harmful bacteria and fungi by competing for nutrients, growth sites, and directly colonizing and attaching to fungal pathogens.
When should I use it?
Apply to foliage as soon as conditions favor pathogen development, but before or as the pathogen becomes apparent.
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In addition to helping with fungal, bacterial, and arthropod pests in the growing environment, microbial products have other ways of supporting your operations.
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MegaPhos SP
Active ingredient: Bacillus megaterium strain HM86
Target disorder: Phosphorus deficiency
How does it work?
MegaPhos SP colonizes the rhizosphere and grows on the root system. MegaPhos SP produces several enzymes and secondary metabolites that solubilizes phosphorus that is normally unavailable to your plants.
When should I use it?
Apply via soil incorporation, seed treatment, soil application or foliar spray.
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Photo credits:
1. Corn earworm, tomato fruitworm (Helicoverpa zea): R.L. Croissant, Bugwood.org
2. Powdery mildew: Whitney Cranshaw, Colorado State University, Bugwood.org
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