Bu çalışmada bir ruhsatlı olmak üzere 11 farklı fungisitin 14 konsantrasyonunun in vitro koşullarda Phoma tracehiphila’nın en virulent izolatlatının (Pt-E10) miselyal gelişimi üzerine etkileri araştırılmıştır. In patojenin gelişimini engellemede cyprodinil (375 g kg-1)+ fludioxonil (250 kg-1) kombinasyonunun 5 ppm≥ , fluxapyroxad (75 l-1) + difenoconazole (50 fungisit 100 uygulama dozları %100 ...

Weeds are a nuisance in a variety of land uses. The increasing prevalence of both herbicide resistant weeds and bans on cosmetic pesticide use has created a strong impetus to develop novel strategies for controlling weeds. The application of bacteria, fungi and viruses to achieving this goal has received increasingly great attention over the last three decades. Proposed benefits to this strateg...

Four new membersofpeptaibol antibiotics, designated as chrysospermins A, B, C, and D, were isolated from the mycelium of Apiocrea chrysosperma AplOl by solvent extraction, silica gel chromatographyand preparative recycling HPLC. Their structures as newnonadecapeptides were settled by detailed spectroscopic analysis and chemical degradation experiments. The chrysospermins display antibacterial a...

pathogenicity of 4 isolates of erysiphe betae from 4 different geographical zones of iran on 5 genotypes of beet, with different levels of resistance to powdery mildew, was investigated. eight-week old plants were inoculated by conidia from 4 isolates separately. indices for infection were estimation of leaf infection and number of produced conidia on the leaf surface 3 weeks after inoculation....

چکیده پوسیدگی عمومی طوقه و ریشه گندم در سال های اخیر به عنوان یک بیماری مهم در استان خراسان شمالی جلب توجه نموده است. به منظور شناسایی عامل یا عوامل اصلی قارچی بیماری در سال های زراعی 86- 1385و87 - 1386 نمونه برداری هائی از مزارع گندم آبی مشکوک به بیماری درمناطق شیروان، فاروج، بجنورد، اسفراین و مانه و سملقان در سه مرحله گیاهچه، پنجه زنی تا ساقه رفتن و ظهور سنبله تا سفت شدن دانه به عمل آمد. از ب...