Application of metarhizium anisopliae strain in preparation of medicine for killing aphids

Abstract

The invention discloses an application of a metarhizium anisopliae CQMa421 strain in the preparation of a medicine for preventing and treating aphids. The medicine for preventing and treating the aphids is prepared from the following raw materials in percentage by weight: 35%-52% of metarhizium anisopliae CQMa421 xerospore powder, 40%-50% of kieselguhr, 1%-2% of nanometer aluminum oxide, 3%-5% of sodium carboxymethylcellulose, 2%-4% of OP-10 and 2%-4% of HEL-40. Black peach aphids and lipaphis erysimi kaltenbach can be infected by the metarhizium anisopliae CQMa421 strain; and the fatality rate on the black peach aphids and the lipaphis erysimi kaltenbach can respectively reach 71.5% and 70.8%. The fatality rate of the metarhizium anisopliae CQMa421 strain prepared by adopting a method for enhancing the toxicity can reach 100% and is improved by 30%; and the effect is very outstanding. Various components of a metarhizium anisopliae preparation effectively cooperate to reach the effect of synergistic interaction. The metarhizium anisopliae preparation disclosed by the invention is sprayed by blending in water; and the field control effect on the black peach aphids and the lipaphis erysimi kaltenbach reaches 80% or above. The preparation has good ultraviolet resistant characteristic and wetting dispersion characteristic; the biological activity in long-term storage is kept; and the storage time can reach 12 months.

Description

technical field

[0001] The invention relates to a new application of a strain of Metarhizium anisopliae, in particular to a preparation for killing aphids and an application of the Metarhizium anisopliae, belonging to the field of biological pesticides. Background technique

[0002] Cabbage aphid is an important vegetable pest. In addition to direct feeding hazards, it is also the main vector of various plant viruses, and the damage of the latter is often more than that of direct feeding. Among them, the main vegetable aphids in my country, including peach aphid and radish aphid, are broad-feeding pests. The hosts mainly include pears, peaches, plums, plums, cherries and other Rosaceae fruit trees and cabbage, cabbage, radish, mustard greens, brassica, turnips, sweet peppers, Capsicum, spinach and many other crops. Radish aphids can damage cruciferous vegetables such as cabbage, Chinese cabbage, radish, kale, broccoli, and sedge vegetables, and often occur mixed with peach a...

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