Effects of a novel fungicide benthiavalicarb-isopropyl against Oomycete fungal diseases

摘要

Benthiavalicarb-isopropyl, isopropyl [(S)-l-[(R)-l-(6-fluorobenzothiazol-2-yl)-ethylcarbamoyl]-2-methylpropyl] carbamate is a novel fungicide which is active against Oomycete fungal pathogens of various crops. Present studies show that it effectivelycontrols potato and tomato late blight caused by Phytophthora infestans and downy mildews caused by Plasmopara viticola, Pseudoperonospora cubensis or Peronospora parasitica. Benthiavalicarb-isopropyl is strongly inhibitory to mycelial growth, sporulation and germination of sporangia and cystspore. It does not show cross-resistance to phenylamide and strobilurin fungicides, suggesting a different mode of action. This compound has not only strongly preventive activity, but also curative and penetrant activity, with excellent residual effects and rainfastness. Benthiavalicarb-isopropyl has a very favorable toxicological and environmental profile and does not cause phytotoxic symptoms on a number of crops, vegetables and fruits.