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In vitro assessment of pathogenicity and culture filtrates of fungi against Heterodera schachtii
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نویسنده
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AYATOLLAHY E. ,FATEMY S.
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منبع
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آفات و بيماريهاي گياهي - 1388 - دوره : 77 - شماره : 2 - صفحه:15 -26
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چکیده
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The pathogenicity of four isolates of three fungal species against females and cysts of heterodera schachtii on water agar and the effects of fungal filtrates on motility of second-stage juveniles were examined. rates of egg colonization by the fungi were measured after 3 weeks at 20 °c on 0.8% water agar. fungi penetrated both females and cysts of which 60, 36, 21 and 17% of the eggs were infected by the two isolates of paecilomyces lilacinus (pl 8.1 & pl 25.4), cylindrocarpon destructans var. crassum and chaetomium murorum, respectively. filtrates of the fungi reduced mobility of the nematode j2 after 24 and 48 h incubation periods. isolate 8.1 of p. lilacinus paralyzed 100% of the j2 after both 24 and 48 h incubation periods. after 48 h of incubation the extracts of isolate 25.4 of p. lilacinus, c. destructans var. crassum and c. murorum paralyzed 25, 22 and 9% of the j2, respectively.
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کلیدواژه
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chaetomium murorum ,cylindrocarpon destructant var.crassum ,Paecilomyces lilacinus ,fungal filtrate ,juvenile mobility ,sugar beet cyst nematode
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آدرس
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university of tehran, Department of Plant Protection, Abourayhan Campus, ایران, Iranian Research Institute of Plant Protection
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پست الکترونیکی
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sfatemy@yahoo.com
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Authors
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