Resistance to the microbial insecticide Bacillus thuringiensis Berliner has evolved in field populations of diamondback moth, Plutella xylostella (L.), in Hawaii. Three field populations that had been treated repeatedly with commercial formulations of the sporecrystal protein complex of B. thuringiensis subsp. kurstaki developed significant resistance to it. The LC50 of the most resistant popul...

Selection of two strains (TL and BK) of diamondback moth, Plutella xylostella (L.) with chlorfluazuron has produced high levels of resistance in comparatively short time (9 and 10 generations). The resistance ratio values reached 276and 216-fold, for TL and BK strains, respectively. The BK strain developed about 80-fold resistance level after only three selection generations with chlorfluazuron...

Potential trap crops for the diamondback moth, Plutella xylostella (L.) (Lepidoptera: Plutellidae), were evaluated through a series of ovipositional preference and larval survival experiments in outdoor screenhouses in 2002 and 2003. Hosts examined as trap crops were glossy and waxy collards, Brassica oleracea L. variety acephala; Indian mustard, Brassica juncea (L.) Czern; and yellow rocket, B...

Resistance to spinosad insecticide in field populations of diamondback moth was discovered at Kunia, Hawaii, in November 2000, about two and a half years after its introduction. Leaf-dip assays of field populations from the islands of Oahu, Maui and Hawaii confirmed moderate to high levels of resistance compared with pre-introduction baselines. Resistance occurred despite label restrictions tha...

The diamondback moth, Plutella xylostella (L.), is considered the most universally distributed of all Lepidoptera and the main insect pest of crucifers worldwide. Although P. xylostella is confined to feeding on plants within the Cruciferae, this diverse family contains a wide host of weed species and cultivated plants that occur throughout the world. Over the last several decades the importanc...