Interaction with humans Diamondback moth

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1 interaction humans

1.1 pest of crops

1.1.1 pesticide resistance
1.1.2 other controls







interaction humans
pest of crops

larvae damage leaves, buds, flowers, , seed buds of cultivated cruciferous plants. although larvae small, can numerous , cause complete removal of foliar tissue except leaf veins. damaging young seedlings , may disrupt head formation in cabbage, broccoli, , cauliflower. presence of larvae in florets can result in complete rejection of produce. diamondback moth considered pest in areas not experience cold winters, these reduce adult activity , kill off overwintering moths. considered significant issue in china, has been argued chinese cabbage represents country s significant vegetable crop.


pesticide resistance

the diamondback s lack of natural enemies, such parasitoids, may accounted widespread use of insecticides in 1950s. diamondback not recognized ddt-resistant until 1953, , broad-spectrum use of insecticides did not begin until late 1940s. 1980s, resistance pyrethroids had developed. limiting broad spectrum insecticide use , particularly elimination of pyrethroid use, can increase survival , propagation of diamondback parasitoids, microplitis plutellae, diadegma insulare, , diadromus subtilicornis.


the diamondback moth first insect found have become resistant biological control bt toxin (from bacillus thuringiensis) in field. bt toxin poisonous when ingested insects not mammals, used target low infestation levels of moth. research has shown diamondback moth has autosomal ressessive gene provides resistance 4 specific types of b. thuringiensis (cry1aa, cry1ab, cry1ac, , cry1f). trichoplusia ni (cabbage looper) other insect have developed resistance bt toxin in agricultural systems, in greenhouses.


other controls

rainfall , irrigation can kill larvae. cultural practice of intercropping in china serve reduce number of diamondback larvae on cruciferous plants. however, not lead reduction of damage. has been suggested sex pheromones , host odors manipulated attract , trap diamondback moths means of chemical management.








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