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An Effective Inoculation Method for Phytophthora capsici on Black Pepper Plants
Published on: September 16, 2022
Activity against plant pathogenic fungi of phomalactone isolated from Nigrospora sphaerica
1Screening Division, Korea Research Institute of Chemical Technology, PO Box 107, Yusong-Gu, Taejon 305-600, Korea. kjinc@krict.re.kr
Abstract:
Phomalactone, 5,6-dihydro-5-hydroxy-6-prop-2-enyl-2H-pyran-2-one, produced by the fungus Nigrospora sphaerica, was tested in vitro against nine plant pathogenic fungi, and specifically inhibited the mycelial growth of Phytophthora infestans, with an MIC value of 2.5 mg litre-1. Its inhibitory activities against sporangium and zoospore germination of P infestans were similar to those against Phytophthora capsici. In vivo, at 100 and 500 mg litre-1, it reduced the development of tomato late blight caused by P infestans.
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