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Your Position :Home->Past Journals Catalog->2011年48 No.2

Screening of optimum proportion and field effect of mixtures of Bt engineering strain WG001 and chemical insecticides against Plutella xylostella
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Key Words:wordsBacillus thuringiensis engineering strain WG-001, indoxacarb, Plutella xylostella, synergetic action, field effect
Abstract:     The relative effectiveness of mixtures of the Bt strain WG-001 with the pesticides indoxacarb, diafenthiuron and cartap for controlling the diamondback moth (DBM) Plutella xylostella (L.) was determined using the leafdipping method. The results indicate that a 100.10∶0.72 mixture of Bt strain WG-001 and indoxacarb was the most synergetic with a cotoxicity coefficient (CTC) of 178.05. Mixtures of Bt strain WG-001 with diafenthiuron or cartap had an additive or antagonistic action, respectively. Results of a field trial showed that the average control effect of a 500 times dilution of the Bt strain WG-001 and indoxacarb mixture was 84.88% 7 days after treatment, significantly higher than using either Bt WG-001 or indoxacarb separately (P<0.05).
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