EVALUATION OF FUNGICIDES, PLANT EXTRACTS AND Trichoderma harzianum Rifai AGAINST Phytophthora parasitica var. nicotianae (Breda de Haan) Tucker, THE CAUSE OF BLACK SHANK OF TOBACCO
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Date
1992
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AAU, Anand
Abstract
Investigations on effect of different chemicals/ fungicides, plant extracts including botanical pesticides and Tr ichoderma harzianum Rifai on growth of Phytophthora parasitica var, n icot ianae (Breda de Haan) Tucker (raceO), the causal agent of black shank of tobacco, were carried out _ui^ vi tro. Efficacy of metalaxyi MZ and acqueous leaf extracts of Oc imum sane turn L. and Eucalyptus citriodora Hook singly and in combination with T. harzianum against black shank was also studied under partly controlled conditions . Out of 17 different chemicals/fungicides evaluated all copper fungicides barring copper oxychloride (Fytolan 50%), three metalaxyl based formulations, viz., Apron 35 SD, Ridomil + Ziram 280 FW and Ridomil MZ 72 WP, mancozeb (Dithane M 45 75 WP), chlorothalonil (Kavach 75 WP)and captafol (Foltaf 80 WP) were found to completely inhibit the growth of P. parasitica var. nicotianae.
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Keywords
Plant Pathology, Agriculture, EVALUATION