Assessment of Beauveria bassiana Sprays for Control of Diamondback Moth (Lepidoptera: Plutellidae) on Crucifers

نویسندگان

  • J. D. VANDENBERG
  • A. M. SHELTON
  • W. T. WILSEY
  • M. RAMOS
چکیده

J. Econ.Entomol.91(3): 624-630 (1998) ABSTRACT Evaluations of the efficacy and persistence of Beauveria bassiana (Balsamo) Vuillemin for control of the diamondback moth, Plutella xylostella (L.),on cnlcifers were done in growth chambers, the greenhouse, and the field. In growth chamber studies done at 21 or 26°C and 60 or 90%RH, neither temperature nor humidity affected the survival oflarvae, but treatment with fungal spores always provided significantly greater mortality than the control. In 2 grecnhouse trials, 1 application of B. bassiana spores suspended in water or oil significantly reduced larval populations compared to controls. In a field trial, both treatment and insect stage at treatment (2nd and 3rd to 4th instars) significantly affected larval survival. The fungus, formulated as a wettable powder at 2 rates and as an emulsifiable suspension at a high rate, provided significant reductions in larval counts. Two applications of the wettable powder at the higher rate resulted in lower larval counts than did a single application. Two applications (but not 1) of wettable powder at the lower rate resulted in significantly lower counts of 2nd instars but not 3rd to 4th instars. Both treatment and time affected both the persistence of viable B. bassiana spores on leaves and the retention of efficacy of treated leaves for P.xylostella larvae. These trials indicate the potential for including B. bassiana in an overall management program for P. xylostella.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Investigations into the development of cross-tolerance in the Diamondback Moth (Plutella xylostella L., Yponomeutidae: Lepidoptera) to the entomopathogenic fungus Beauveria bassiana (Bal.) Vuillemin (Deuteromycotina: Hyphomycetes) and the toxin Dipel of Bacillus thuringiensis

The present research represents the first investigations into the development of crosstolerance in the larvae of Diamondback Moth (DBM) tolerant to Bacillus thuringiensis toxin (Bt-toxin: Dipel) and treated with different concentrations of the entomopathogenic fungus Beauveria bassiana (strain BbGHA). Significant differences (at P = 0.05) were obtained between the fungus concentrations used for...

متن کامل

Prospects for novel approaches towards management of the diamondback moth

Primary reliance on synthetic insecticides for control of diamondback moth has usually failed because of insecticide resistance and/or reduction of natural enemies by insecticides. Insecticide resistance has also been more recently documented with biological insecticides such as Bacillus thuringiensis and some growth regulators. Insecticide resistance management programs must be implemented and...

متن کامل

Using yellow rocket as a trap crop for diamondback moth (Lepidoptera: Plutellidae).

Yellow rocket, Barbarea vulgaris (R. Br.) variety arcuata, was evaluated as a trap crop for diamondback moth, Plutella xylostella (L.) (Lepidoptera: Plutellidae), in cabbage, Brassica oleracea L. variety capitata, in 2003 and 2004. In 2003, the numbers of P. xylostella larvae found in field plots of cabbage alone were 5.2-11.3 times higher than those on cabbage plants in plots that included cab...

متن کامل

Evaluation of Metarhizium anisopliae, Beauveria bassiana and Paecilomyces fumosoroseus as Entomopathogens of the Cactus Moth, Cactoblastis cactorum (Lepidoptera:Pyralidae)

The three fungal pathogens Metarhizium anisopliae (Metchnikoff) Sorokin (Hypocreales: Clavicipitaceae), Paecilomyces fumosoroseus (Wize) Brown & Smith (Deuteromycotina: Hyphomycetes), and Beauveria bassiana (Bals.-Criv.) Vuill. (Hypocreales: Clavicipitaceae) were evaluated as potential biological control agents against the cactus moth, Cactoblastis cactorum (Berg) (Lepidoptera: Pyralidae). The ...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2012