Fungal insecticides are the most widely used type of microbial insecticides except bacterial insecticides. At present, the active ingredients of fungal insecticides mainly include Beauveria bassiana, Metarhizium anisopliae and Paecilomyces lilacinus (Thom.) Samson, etc. These fungi are highly infective, The insecticidal effect can be achieved through mycelium invasion of insects, enzymatic hydrolysis, and inhibition of insect immunity.
The highly virulent strain of Metarhizium anisopliae is pathogenic to a variety of pests and can efficiently infect Lepidoptera, Coleoptera, Orthoptera, Diptera, Hymenoptera, Hemiptera and Thysanoptera30 A variety of important agricultural pests, but does not infect natural enemies such as dragonflies, parasitic wasps, praying mantises and ladybugs.
Beauveria bassiana, as another widely used active ingredient of fungal insecticides, can infect a variety of insects. After its spores attach to insects, they can kill pests through spore growth, mechanical invasion, and enzymatic hydrolysis. .
In recent years, the number of Beauveria bassiana insecticides has gradually increased, and the scope of control has become wider and wider. As of December 31, 2022, a total of 29 pesticides with Beauveria bassiana as active ingredients have been approved for registration. It can control crop pests such as diamondback moth, pine caterpillar, corn borer, American white moth Hyphantria cunea, grub Trypoxylus dichotomus, fall armyworm, stem borer and aphids. Studies have found that Beauveria bassiana has good effects on controlling thrips, gray tea looper Ectropis grisescens, locusts, rice leaf rollers and brown planthoppers and other pests.
lin-chemical.com 