Evaluation of Antifungal Effect of Different Plant Extracts for the Management of Late Blight of Potato Caused by Phytophthorain festans (Mont.) de Bary

Abstract

In protective disease management Neem (Azadrachta indica) leaf extract was the most effective followed by Garlic (Allium sativum) extract but Neem (Azadrachtaindica) oil was least effective on all the five varieties (Cardinal, Karoda, Rodio, Shanan and Siply Red). Most effective dose of Neem (Azadrachta indica) leaf extract and all other plant extracts was 3 % followed by 2 % and 1 % being least effective while7 days spray interval was most effective as compared to 14, 21 and 28 days. In curative disease management program Neem (Azadrachta indica) leaf extract @3 % was most effective followed by Garlic (Allium sativum) extract @3 % while euclyptus (Eucalyptusglobulus) leaf extarct @3% being least effective on all the five varieties (Cardinal, Karoda, Rodio, Shanan and Siply Red). Three consecutive sprays after disease appearance were most effective among all the tested plant extracts followed by 2 and 1 sprays.

Keywords:

• Potato
• Late Blight Management
• Biological Control
• disease index
• disease severity Botanicals