Extracts some plants on controlling green mold of orange and on Postharvest Quality Parameters

Abstract

Ten Crudes plant extracts of Neem, Pong-pong, Chilly, Lemon grass, Tumeric, Clove, Green chirayta, Mahogani, Curry leaf and Ginger were test against Penicillium digitatum, the causes of green mould disease of orange fruits, was evaluated for their inhibitory effect in vitro and in vivo (500 to 3000ppm) during storage conditions(2000 to 5000 ppm). Followed to lethality test LC50 (BST) to determine the lethal dose. The concentration at 3000 ppm from Neem, Pong-pong and Chilly showed the highest inhibition growth reached the (90%) followed by Lemon grass and Ginger by inhibition reached (70%). In vivo experiments, treating fruits 21 days crude extraction from Neem, Chilly and Pong-pong at conc. of 4000 and 5000ppm showed significantly reduced the disease severity of fruits (100%) compared with untreated fruits (control) at 25°C, through significantly reduced the undesirable fruits percentage, fruit weight loss percentage during storage for 21 days. Lethal concentration (LC50) values of the crude extracts at 20, 5 and 30 μg/ml from Neem, Pong-pong 1 and Chilly showed very high lethal toxicity on brine and effect Lemon grass and Ginger in killed 50% was at 495 and 473 μg/ml1 respectively. Plant extracts or botanicals have a bright future in modern plant protection to replace conventional synthetic fugicides.