Threshold Level for Powdery Mildew in Cluster Bean
Year: 1986
Type: article
Abstract: For fixing up the threshold level for powdery mildew (Erysiphe polygoni) in cluster-bean (Cyamopsis tetragonaloba var. Pusa-Nav-Bahar), a field trial was conducted for two crop seasons. at Hyderabad. The linear regression equation derived suggests that no loss in yield occurs upto 26 per cent disease incidence (Pill) thereby indicating this to be the threshold level. Seed dressing with ethirimol and foliar spray with wettable sulphur resulted in the lowest PDI and highest yield. Therefore, except seed-dressing, the foliar spray can be delayed until the PDI value reaches 26 or altogether avoided if it does not reach that level. Thus, the investment on foliar spray of fungicides can be minimised.
Authors: V.V. Ranga Rao, A. Papa Rao, Swati Pandit
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: diamond
OpenAlex ID: W2293332591