ECOLOGY OF BACILLUS-THURINGIENSIS IN STORAGE MOTHS
ECOLOGY OF BACILLUS-THURINGIENSIS IN STORAGE MOTHS
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DOI：
10.1016/0022-2011(77)90210-5
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发表时间：
1977-01-01
影响因子：
3.4
通讯作者：
HURST, JA
中科院分区：
文献类型：
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作者：
BURGES, HD;HURST, JA
通过连续饲养技术生产无病的Plodia interpunctella原种。在该种群的密集种群中，H血清型V B的孢子数为104个或更多。在200克食物表面上的一个点施用苏云金杆菌需要引起动物流行病，而在表面上均匀分布时需要107或更多。在受感染的种群中，孢子污染了昆虫所有阶段的表面。在患病的幼虫尸体中，有5.6-42.2倍。108孢子/g干害虫（P. interpunctella，Ephestia cautella，Anagasta kuehniella，E. elutella和Galleria mellonella）。幼虫不吃活幼虫，而食物是存在的，但他们有时吃尸体。这是疾病自然传播的最有力的手段。自然感染主要发生在有保护的环境中，如食物库，通常较轻，但偶尔会发生死亡幼虫的壮观表面积聚，这可能与应激、幼虫的生理状况、细菌的血清型或行为模式如迁移有关。自然疾病可能抑制了残骸中的虫害，但它攻击得太晚，无法防止对储存食物的过度破坏。预防剂，甚至混合2倍每200克食物需要109个孢子才能有效控制昆虫。
A disease-free stock of Plodia interpunctella was produced by a continuous rearing technique. In dense populations of this stock, 104 or more spores of H serotype V B. thuringiensis applied at one point on the surface of 200 g of food were required to cause epizootics, compared with 107 or more when spread evenly over the surface. In infected populations spores contaminated the surfaces of all stages of the insect. In diseased larval cadavers there were 5.6-42.2 .times. 108 spores/g of dry insect (P. interpunctella, Ephestia cautella, Anagasta kuehniella, E. elutella and Galleria mellonella). Larvae did not cannibalize live larvae while food was present though they sometimes ate cadavers. This was the most potent means of natural spread of the disease. Occurring mainly in protected situations such as food stores, natural infections were usually light, but occasionally spectacular surface accumulations of dead larvae occurred possibly associated with stress, physiological condition of the larvae, serotype of the bacterium or behavior pattern such as migration. Natural disease probably curbed infestations in debris, but it attacked too late to prevent excessive damage to stored food. A prophylactic, even admixture of 2 .times. 109 spores/200 g of food was required for effective insect control.