In this paper, we studied the influence of some plant extracts upon Phytophthora infestans and Pseudoperonospora cubensis zoospores releasing and germination. We have tested the extracts obtained from Paeonia suffruticosa and Hedera helix macerated in acetone in different concentrations. There was observed the inhibition of zoospores releasing and germination.

plant extracts downy mildew of tomatoes and cucurbits; zoospore releasing; zoospore germination

Presentation: oral