关键词: 植物杀菌素, 大蒜, 青霉素, 绿霉素, 柑桔

Abstract:  Spore sprouting inhibition tests and single fruit inoculations were conducted to determine the antifungal effects of the natural plant ablasting from garlic . onion and ginger. It was proven that the extracts of garlic , onion and ginger have antifungal effects on Penicillium italicum wekmer and P. digitatum sacc which often infect citrus fruits and cause seriouspostharvest losses. Among these materials, thd garlic extract had most potent effect while the ginger extract demonstrated to be least potent. 2. 5% of garlic or 10. 0% of onion extracts could inhibit more than 90% of the sprouting of the mould spores ; and 12. 5% of the ginger extract could inhibit only 35%-60% of the mould spores. Extracts of 2. 5% garlic or 10% onion or 40% ginger had the same effect on preventing the infection and rotting of citrus fruits caused by Penicillium italicum wehmer and P. digitatum sacc.

Key words: Plant ablastins Garlic Penicillium italicum wehmer P.digitatum sacc Citrus fruit