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Influence of HD1 ( Bacillus thuringiensis ssp. kurstaki ) on the developmental stages of Diadegma sp. (Hym., Ichneumonidae) parasitoid of Plutella xylostella (Lep., Yponomeutidae)
Author(s) -
Monnerat R. G.,
Bordat D.
Publication year - 1998
Publication title -
journal of applied entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.795
H-Index - 60
eISSN - 1439-0418
pISSN - 0931-2048
DOI - 10.1111/j.1439-0418.1998.tb01460.x
Subject(s) - diamondback moth , ichneumonidae , biology , plutella , bacillus thuringiensis , parasitoid , larva , pupa , horticulture , botany , bacteria , genetics
Abstract: Laboratory experiments have shown that HD1 strain of Bacillus thuringiensis Berliner has adverse effects on Diadegma sp. Young larvae of Plutella xylostella (L.), the diamondback moth (DBM), were killed by B. thuringiensis when the larvae were parasitized by Diadegma for only a short time (less than two days). Larvae were parasitized for more than two days before adding the bacterium, however, they decreased their foliar consumption (35% less) and therefore consumed fewer spores of B. thuringiensis. The low mortality of the DBM allows the parasitoid to finish its development. The presence of HD1 does not effect the F1 generation of Diadegma sp. There are no significant differences in the time of the larval stage and pupal development, sex‐ratio, longevity of adults and percentage of parasitism between adults from HD1 infected or non‐infected larvae.