Efficacy of Bacillus Thuringiensis (var. Kurstaki) against Diamondback Moth (Plutella Xylostella L.) Eggs and Larvae on Cabbage Under Semi-Controlled Greenhouse Conditions
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چکیده
منابع مشابه
Efficacy of Bacillus thuringiensis (var. kurstaki) Against Diamondback Moth (Plutella xylostella L.) Eggs and Larvae on Cabbage Under Semi-Controlled Greenhouse Conditions
The efficacy of Bacillus thuringiensis (var. kurstaki) (Btk) against the diamondback moth (DBM) on cabbage was studied at Botswana College of Agriculture, Gaborone, Botswana. Using five concentrations of Btk: 2, 4, 6, 8, and 10 g/L, bioassays were conducted against DBM eggs and second instar larvae at 30°C ± 5°C. Each treatment was replicated three times. Probit analysis was used to determine t...
متن کاملIntegrative model for binding of Bacillus thuringiensis toxins in susceptible and resistant larvae of the diamondback moth (Plutella xylostella).
Insecticidal crystal proteins from Bacillus thuringiensis in sprays and transgenic crops are extremely useful for environmentally sound pest management, but their long-term efficacy is threatened by evolution of resistance by target pests. The diamondback moth (Plutella xylostella) is the first insect to evolve resistance to B. thuringiensis in open-field populations. The only known mechanism o...
متن کاملToxicity of Bacillus thuringiensis Spore and Crystal Protein to Resistant Diamondback Moth (Plutella xylostella).
A colony of Plutella xylostella from crucifer fields in Florida was used in mortality bioassays with HD-1 spore, CryIA(a), CryIA(b), CryIA(c), CryIB, CryIC, CryID, CryIE, or CryIIA. The data revealed high levels of field-evolved resistance to HD-1 spore and all CryIA protoxins and no resistance to CryIB, CryIC, or CryID. CryIE and CryIIA were essentially not toxic. When HD-1 spore was combined ...
متن کاملToxicity of Selected Insecticides (Spinosad, Indoxacarb and Abamectin) Against the Diamondback Moth (Plutella xylostella L.) on Cabbage
Plutella xylostella L. is a most serious of insect pest for cruciferous or Brassica crops throughout the world. The common name of this insect pest is the Diamondback Moth (DBM). Plutella xylostella L. is an oligophagous insect which is feed on the group of botanically plants within the single plant family. This insect has become major serious problem to the crops because it easily and rapidly ...
متن کاملCross-Resistance to Bacillus thuringiensis Toxin CryIF in the Diamondback Moth (Plutella xylostella).
Selection with Bacillus thuringiensis subsp. kurstaki, which contains CryIA and CryII toxins, caused a >200-fold cross-resistance to CryIF toxin from B. thuringiensis subsp. aizawai in the diamondback moth, Plutella xylostella. CryIE was not toxic, but CryIB was highly toxic to both selected and unselected larvae. The results show that extremely high levels of cross-resistance can be conferred ...
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ژورنال
عنوان ژورنال: International Journal of Insect Science
سال: 2015
ISSN: 1179-5433,1179-5433
DOI: 10.4137/ijis.s23637