Studies On Postharvest Diseases And Screenging Of Antagonists For Garlic Sprouts

In this paper, with garlic sprouts from different planting areas as the experimental materials, post-harvest prominent pathogens of garlic sprouts isolated by Koch ' s Postulate and studies of its biological characteristics were the base of controlling garlic sprouts post-harvest diseases. And Antagonists were screened from the latter store garlic sprouts infected by pathogens, and its inhibition mechanism were studied, in order to build up a new and try to an effective and simple way of screening Antagonists. The main results were as follows:768 epiphytes were isolated and purified from Jinxiang, Cangshan, Liaocheng, Laiwu and Shanghe in Shandong province, Zhengzhou in Zhengzhou province and Yongnian in Hebei etc, in which 9 pathogens were identified. Botrytis cinerea Pers.ex Fr and Alternaria Nee ex Wallr. Were identified as Prominent pathogens, because they had the separate incidence of 22.5% and 41.85% and the infection index of 81 %and 72.6%.The present paper measured the biological characteristics of the two Prominent pathogens and generated the results as follows.For the mycelial growth of Botrytis cinerea Pers.ex, the range of temperature was between 5℃ to 30℃, the optimum being 25℃, and the range of pH was 2.5～12.5, the optimum being 6. Fructose and glucose was the best carbon source for the mycelium growth of the fungus. For the sporulation of Botrytis cinerea Pers.ex , the range of temperature was between 15℃ to 25 ℃, the optimum being 20℃, and the range of pH was 3.5～12.5, the optimum being 6. Glucose was the best carbon source for the sporulation of the fungus. Alternation of light and dark was suitable for the mycelial growth and sporulation of Botrytis cinerea Pers.ex.For the mycelial growth of Alternaria Nee ex Wallr., the range of temperature was between 5℃ to 40℃, the optimum being 28℃, and the range of pH was 2.5～12.5, the optimum being 8.5. Glucose was the best carbon source for the mycelium growth of the fungus. For the sporulation of Alternaria Nee ex Wallr., the range of temperature was between 30℃ to35℃, the optimum being 35℃, and the range of pH was 4.5～12.5, the optimum being 8.5. Lactose was the best carbon source for the sporulation of the fungus. Alternation of light and dark was suitable for the mycelial growth and the sporulation of Alternaria Nee ex Wallr..13 Antagonists having inhibition effective on garlic sprout pathogens were screened from the superficial of healthy and putridity garlic sprouts and...