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1.在实验室条件下,苏芸金杆菌、腊螟杆菌、杀虫菌粉3号各菌种的悬浮液对于卫茅巢蛾、稠李巢蛾及苹果巢蛾的幼虫,均有不同程度的防治效果。2.以苏芸金杆菌对三种巢蛾幼虫的防治效果最显著。对卫茅巢蛾和稠李巢蛾幼虫经处理后72小时内均有可能达到100%的死亡率,对苹果巢蛾处理后96小时最高可达94.7%的死亡率。3.三种巢蛾幼虫对于苏芸金杆菌的敏感性各有不同,以卫茅巢蛾最为敏感,稠李和苹果巢蛾次之。例如卫茅巢蛾处理后72小时内死亡率可达50—100%,平均为75%,96小时各重复均为100%(表1);稠李巢蛾72小时内死亡率为42—60%,平均为55.5%,120小时始达100%(表1);苹果巢蛾72小时死亡率为41.1—89.4%,平均为60.6%,96小时死亡率的增加并不高(表6)。4.苏芸金杆菌对于巢蛾幼虫不仅有致死作用,也能引起幼虫的忌避作用。处理过的植株幼虫取食量极少,甚至完全不取食,因此也对植株起到保护作用。腊螟杆菌在一定程度上也有类似的特点。5.同一菌种对于同种害虫的效果也可能不同,如曾经过虫体复壮的苏芸金杆菌T108-m 较之未经过虫体复壮的T112-a 对卫茅巢蛾老熟幼虫的效果为良(表2)。6.供试菌种对于甘兰夜蛾、粘虫及树莓夜蛾幼虫的效果均不良,可初步认为这些菌种不宜应用于防治夜蛾科的害虫。7.致病细菌的发挥效能以通过害虫消化道而破坏虫体组织为主。接触表皮效果如何尚不能肯定。8.研究中曾注意到病休血液的检查,但病症的表现、发病历程与虫体内部组织学和生理学上变化的关系有待进一步探讨。9.不同浓度菌液、经复壮与未经复壮的菌系以及在不同环境条件下对于害虫可能出现的不同作用亦有待进一步研究。
1 under laboratory conditions, Bacillus thuringiensis, Bacteroides paste, insecticidal powder No. 3 suspension of the species of David’s nest, moth and apple nest moth larvae, have varying degrees The prevention and treatment effect. Bacillus thuringiensis three nest moth larvae prevention and treatment of the most significant. It is possible to achieve 100% mortality within 72 hours after treatment for both the female and female adults of Larvae, and up to 94.7% mortality after 96 hours treatment of the apple grass moth. The three kinds of nest moth larvae have different sensitivity to Bacillus thuringiensis, and are the most sensitive to the female moth, the second is the female plum and the female moth. For example, the death rate of up to 50-100% within 72 hours after treatment by M. scoparia, averaged 75% and 100% at 96 hours (Table 1). The death rate of C. sinensis in 42 hours was 42-60 %, With an average of 55.5% and reaching 100% after 120 hours (Table 1). The mortality of the apple moth at 72 hours was 41.1-89.4% with an average of 60.6%. The increase in 96-hour mortality was not high (Table 6). Bacillus thuringiensis for nest moth larvae not only have a lethal effect, but also can cause the role of larvae to avoid. Treated plant larvae eat very little, or do not feed, and therefore play a protective role of plants. To a certain extent, BAC also has similar characteristics. The effect of the same strain on the same species of pests may also be different, such as the effect of the strain of Bacillus thuringiensis T108-m, which had been rejuvenated, on the mature larvae of the female Laoderma avenae Be good (Table 2). 6. The test strains on the brown, moth and rattan moth larvae are not good, may initially think that these strains should not be applied to control the noctuid insects. 7. The effectiveness of pathogenic bacteria through the pest digestive tract and destruction of parasitic tissue based. The effect of contact with the skin is still not sure. 8. The study has noted the sick off the blood test, but the performance of the disease, the course of the disease and the internal histological and physiological changes in the relationship needs to be further explored. Different concentrations of bacteria, rejuvenated and non-rejuvenated strains and under different environmental conditions may have different effects on pests also need further study.