论文部分内容阅读
目的:研究化橘红害虫花蕾蛆越冬幼虫在不同品系化橘红树冠下土壤中的分布规律,及绿僵菌对其幼虫的室内致病力测定,为花蕾蛆的地面防控提供科学依据。方法:采用筛土法对花蕾蛆越冬幼虫在不同品系化橘红树冠下土壤中的水平方向、垂直深度及不同方位的分布格局进行调查;采用喷施孢子悬浮液法在室内初步测定了绿僵菌对其幼虫的致病力。结果:凤尾品系化橘红为花蕾蛆的易感品系,越冬幼虫大都集中在北侧、地表土层0~3 cm、滴水线内100 cm处的土壤中,呈聚集分布格局;绿僵菌对花蕾蛆幼虫有一定的致病力,尤以4号菌株的致病力最强。结论:花蕾蛆对不同品系化橘红有选择性,在土壤中呈聚集分布规律;绿僵菌对花蕾蛆幼虫有致病力,表现出良好的生防潜力。
OBJECTIVE: To study the distribution of overwintering larvae of flower bud maggot in the soil under different canopy oranges, and to determine the indoor pathogenicity of Metarhizium anisopliae on larvae, providing a scientific basis for the prevention and control of flower bud maggots on the ground. Methods: The distribution patterns of horizontal and vertical depths and different orientations of overwintering larvae in the flower bud maggot were investigated by using the method of sieving and soil tests. Metarhizium anisopliae Pathogenicity of its larvae. Results: Most of the overwintering larvae were concentrated in the northern side of the soil, 0 ~ 3 cm in the surface soil layer and 100 cm in the drip irrigation line. The distribution pattern was Metarhizium anisopliae Bud maggot larvae have a certain degree of virulence, especially strain No. 4, the strongest virulence. CONCLUSION: The bud maggot is selective to the orange-red of different strains and aggregated in the soil. Metarhizium anisopliae has virulence on the bud maggot larvae and shows good biocontrol potential.