an investigation of the efficacy of two iranian isolates of metarhizium anisopliae against russian wheat aphid, diuraphis noxia (hemiptera: aphididae) under laboratory conditions
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چکیده
in this study, the effects of two metarhizium anisopliae isolates, originally obtained from red palm weevil (rhynchophorus ferrugineus) and a beetle (parandra caspica), on adults of russian wheat aphid diuraphis noxia were studied under laboratory coditions. after a determination of the minimum & maximum concentrations, the adults were treated with conidial concentrations of 1×103 to 1×106 conidia/ml to determine the lc50 & lc90. demi001 proved to possess the lowest lc50 (1.7×103 conidia/ml) whilst demi002 the highest (2.5×106 conidia/ml). the lowest lt50 was obtained 1.75 days for demi001 at 1×105/5 conidia/ml. in a completely randomized block design, the mortalities caused by the isolates on the 6th & 10th days were as follows: on the sixth day and for the concentration of 106 conidia/ml, isolates demi001 (32.22%±6.92), demi002 (22.28%±4.39) and for the tenth day, the isolates demi001 (41.9%±6.42), demi002 (28%±4.78) were observed as significantly different.
منابع مشابه
efficacy of iranian isolate of beauveria bassiana against russian wheat aphid diuraphis noxia (mordvilko) (homoptera:aphididae) on the laboratory conditions
in this study, the effects four beauveria bassiana isolates, obtained from soil of fashand, atashgah & ghare-agaj and one from a grass hopper sphingonotus.sp on adults of adult russian wheat aphid diuraphis noxia was studied under laboratory conditions. after determination of the minimum & maximum concentrations, the adults russian wheat aphid were treated with conidial concentrations of 1×103 ...
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Natural hosts of russian wheat aphid diuraphis noxia (mordvilko)(homoptera: aphididae) in the fars province (iran) and a preference test for the grasses under greenhouse conditions
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Salivary proteins of Russian wheat aphid (Hemiptera: Aphididae).
Salivary secretions play critical roles in aphid-host plant interactions and are responsible for damage associated with aphid feeding. The objectives of this study were to evaluate aspects of salivation and the salivary constituents of Diuraphis noxia (Hemiptera: Aphididae). Salivary proteins were isolated and compared from three aphid probed diets: pure water, 15% sucrose, or amino acids (100 ...
متن کاملPHYSIOLOGICAL ECOLOGY Salivary Proteins of Russian Wheat Aphid (Hemiptera: Aphididae)
Salivary secretions play critical roles in aphidÐhost plant interactions and are responsible for damage associated with aphid feeding. The objectives of this study were to evaluate aspects of salivationand the salivaryconstituentsofDiuraphis noxia(Hemiptera:Aphididae). Salivaryproteins were isolated and compared from three aphid probed diets: pure water, 15% sucrose, or amino acids (100 mM seri...
متن کاملbiological responses of russian wheat aphid, diuraphis noxia (mordvilko) (homoptera: aphididae) to different wheat varieties
in recent years, the russian wheat aphid, has been included worldwidely in the list of the important pests of cereals, particularly wheat plants. in addition to direct serious damage, the aphid is the main vector of barley yellow dwarf, barley mosaic, and sugarcane mosaic viruses. the pest was reported from east azarbaidjan province (iran) a few years ago and it is now widespread in tabriz,...
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عنوان ژورنال:
دانش گیاه پزشکی ایرانجلد ۴۱، شماره ۲، صفحات ۳۵۳-۳۵۹
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