Populations of the diamondback moth Plutella xylostella (L.) larvae from two locations : Ooty and Oddanchatram (Tamil Nadu State) were found to be infected by a granulosis virus (GV). The virus was highly pathogenic to P. xylostella larvae and was responsible for the collapse of laboratory colonies of the insect. Restriction endonuclease analysis of the viral DNA with Pst 1, Hind 3, Bam H1 and ...

AIMS To isolate and formulate a native strain of Zoophthora radicans naturally infecting larvae of diamondback moth, Plutella xylostella, existing in South Australia and to provide evidence that formulation of the fungus is effective against P. xylostella larvae, and therefore, it could be used as a tool in pest management of this insect. METHODS AND RESULTS Dose-response bioassays using form...

Pesticide mixtures can reduce the rate at which insects evolve pesticide resistance. However, with live biopesticides such as the naturally abundant pathogen Bacillus thuringiensis (Bt), a range of additional biological considerations might affect the evolution of resistance. These can include ecological interactions in mixed infections, the different rates of transmission post-application and ...

Several types of trap crops have been recommended for managing the diamondback moth, Plutella xylostella, including collards (Brassica oleracea var. acephala) and Indian mustard (Brassica juncea L.). However, results have been variable perhaps because populations of P. xylostella develop on these trap crops and spill over to the cash crop. To overcome this problem, we sought to develop ‘‘dead-e...

The development of insecticide resistance in insect pests is a worldwide concern and elucidating the underlying mechanisms is critical for effective crop protection. Recent studies have indicated potential links between insect gut microbiota and insecticide resistance and these may apply to the diamondback moth, Plutella xylostella (L.), a globally and economically important pest of cruciferous...

STEINERNEMATID NEMATODES WERE EVALUATED AGAINST THE THREE MAJOR CRUCIFEROUS INSECT PESTS: the imported cabbageworm Artogeia rapae, the diamondback moth Plutella xylostella, and the cabbage looper Trichoplusia ni. LC(50) values of S. carpocapsae All, S. feltiae UK, S. feltiae 27, and S. riobrave 335 were 18.2, 3.6, 5.7, and 8.3 on A. rapae L(2); 24.5, 2.3, 6.0, and 15.5 on P. xylostella L(3); an...

El objetivo de la presente investigación fue determinar eficiencia agrupación diversos componentes para el manejo integrado Plutella xylostella L. en cultivo brócoli (Brassica oleracea var. itálica). Se utilizó diseño bloques completamente al Azar (DBCA) con 4 tratamientos: Bacillus thuringensis / trampas luz/ barreras vivas maíz (T1), Metharhizium anisopliae a colores (T2), colores/ (T3), y co...

Screening Bacillus thuringiensis (Bt) isolates or strains for toxicity has traditionally been performed with one bacterial isolate at a time versus a specific insect. By testing Bt strains in groups, we more rapidly identified 28 of 147 Bt isolates as toxic to either diamondback moth, Plutella xylostella (L.), or tobacco hornworm, Manduca sexta (L.). The use of freeze-dried diet and directed po...