Stored wheat

yabatta's picture

Effectiveness of Metarhizium Anisopliae (Metchinkoff) Sorokin Applied Alone or in ‎Combination with Diatomaceous Earth Against Tribolium Confusum (Du Val) Larvae: ‎Influence of Temperature, Relative Humidity and Type of Commodity

Journal Title, Volume, Page: 
Crop Protection, 25: 418-425
Year of Publication: 
Yacoub A. Batta
Laboratory of Plant Protection, Department of Plant Production and Protection, Faculty of Agriculture, An-Najah National University, Palestine.
Current Affiliation: 
Department of Plant Production and Protection,Faculty of Agriculture and Veterinary Medicine, An Najah National University, Nablus, Palestine
Maria P. Michalaki
Laboratory of Agricultural Zoology and Entomology, Agricultural University of Athens, 75 Iera Odos, 11855 Athens, Attica, Greece
Christos G. Athanassiou
Laboratory of Agricultural Zoology and Entomology, Agricultural University of Athens, 75 Iera Odos, 11855 Athens, Attica, Greece
Nickolas G. Kavallieratos
Laboratory of Agricultural Entomology, Department of Entomology and Agricultural Zoology, Benaki Phytopathological Institute, 8 Stefanou Delta, 14561 Kifissia, Attica, Greece
George N. Balotis
Institute of Agricultural Sciences, 182 Kifissias Avenue, 15124 Amaroussion, Attica, Greece
Preferred Abstract (Original): 

Laboratory experiments were carried out in order to assess the insecticidal effect of Metarhizium anisopliae (Metschinkoff) Sorokin (Deuteromycotina: Hyphomycetes) formulations against larvae of Tribolium confusum Du Val (Coleoptera: Tenebrionidae) on flour and wheat. M. anisopliae was applied at three dose rates, of 8106 , 8108 and 81010 conidia/kg to either wheat or flour, respectively. Also the wheat/flour was treated with the diatomaceous earth (DE) formulation SilicoSec (Biofa, Germany), at two dose rates, 0.2 and 0.5 g/kg of wheat or flour either alone or in combination withM. anisopliae with each fungal rate. Mortality ofT. confusum larvae was assessed 7 days after exposure to the treated substrate. The bioassays were conducted at three temperatures, 20, 25 and 301C, and two relative humidity (r.h.) levels, 55% and 75%. Larval mortality was notably varied among treatments, as well among temperature and humidity levels. For both fungus and DE, the increase of temperature increased their effectiveness. On the other hand, the increase of r.h. significantly reduced larval mortality for both M. anisopliae and SilicoSec. Both substances, either alone or in combination, were more effective on wheat than on flour. Also, the addition of 0.5 g of SilicoSec in the fungal preparation, especially at the highest dose rate, increased larval mortality, in comparison with the fungus alone or in combination with 0.2 g of SilicoSec. The results of the present work suggest that, under certain circumstances, the effectiveness of M. anisopliae against T. confusum larvae can be benefitted by the presence of DE.

Syndicate content