TY - JOUR ID - TI - EFFECT OF OIL AND EXTRACT OF GARLIC PLANT AND Penicillium corylophilum (DIRECKX) AS BIO – CONTROL AGENT AGAINST Rhizoctonia solani (Kuhn)THAT CAUSED BLACK SCURF DISEASE ON POTATO تأثير زيت و مستخلص نبات الثوم و الفطر الاحيائي Rhizoctonia solani ( Kuhn ) المسبب لمرض القشرة السوداء على البطاطا AU - Dr. Ahmed Kadhim Abdul- Hadi د. احمد كاظم عبد الهادي PY - 2017 VL - 9 IS - 2 SP - 220 EP - 228 JO - Euphrates Journal of Agricultural Science مجلة الفرات للعلوم الزراعية SN - 20723857 AB - This study was conducted to investigate the effectiveness of oil, water extract and hexane extract of garlic plant, as well as the use Penicillium croylophilum (Direckx) as bio-control agent against pathogenic Rhizoctonia solani (Kuhn) causing black scurf disease in potato under field condition .the pathogenic abiltu test for R. solani on radish seeds conformed high pathogenictiy with a germination percentage of 2%. The percentage of germination of radish seeds was 99% for the treatment of P. corylophilum and 100% for the control treatment without pathogenic R.solani. This indicates the high pathogenicity of the pathogenic R.solani one hand and the non-pathogenic bio – control agent for the plant from the other hand . The study demonstrated the high antagonistic ability of P. corylophimlum against R. solani in the double implant technique where the antagonism degree for P. corylophimlum was 1. The oil and hexane extract of garlic plant at a concentration of 15,000 ppm inhibited of R. solani pathogen growth in the PSA where the pathogenic percentage was 100% and 81% respectively. Field experiments demonstrated high efficiency of P. corylophilum garlic oil , and hexane extract severally in reducing the percentage of infection and its severity in the fungal pathogen R. solani which reached 13, 28, 20, 30, 18 and 29%, respectively, which replected on the tubers weight rate for potato plants reached 510, 390 , and 370 g respectively, with an increase in tuber weight rate in the treatment of P. corylophilum alone compared to the control treatment, which reached 643and 600 g respectively.

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