Method for improving breeding efficiency of encarsia formosa

Abstract

The invention discloses a method for improving breeding efficiency of encarsia formosa. When bemisia tabaci nymphs are bred by adopting a variable-temperature mode, the method disclosed by the invention has the following advantages: 1, individuals of bemisia tabaci nymphs of 2-3 instar are bigger than nymphs of the same instar in the prior art; 2, the survival rate of the nymphs and adults of the bemisia tabaci of all instars is improved, and the time, from egg development to the nymphs and the adults, of the bemisia tabaci is shortened; 3, service lives of the bemisia tabaci adults produced by breeding are longer than bemisia tabaci adults bred by adopting a conventional mode; the bemisia tabaci adults obtained by variable-temperature breeding are used for breeding next generation bemisia tabaci; the egg laying amount of females is higher than that of female bemisia tabaci adults bred by adopting the conventional mode, and the parasitism rate of the encarsia formosa to the bemisia tabaci nymphs is improved. According to the method disclosed by the invention, by shortening the breeding time of an encarsia formosa host, the breeding efficiency of the encarsia formosa is improved.

Description

technical field [0001] The invention belongs to the technical field of biological control of agricultural and forestry pests, and in particular relates to a breeding method of Bemisia tabaci, the host of the bemiphid, used in the process of biological control of the agricultural and forestry pests, and a breeding method of the bemiphid. Background technique [0002] Bemisia tabaci (Gennadius) has a wide range of hosts and is prone to outbreaks. It causes serious damage to a variety of economic crops. It is one of the main pests of tobacco and can transmit tobacco viruses, which has a great impact on tobacco quality. [0003] After Bemisia tabaci infested tobacco, the changes in each component were more complicated, but basically alcohols, ketones, aldehydes and esters decreased, while alkanes increased, and the content of total plant alkaloids decreased; total nitrogen, protein, potassium , reducing sugar and total sugar content increased, and showed a certain relationship w...

AI Technical Summary

Problems solved by technology

One is to cause environmental pollution and pesticide residues

The second is the emergence of drug resistance, the control effect is reduced, and the cost of control is increased

The third is that the use of medicaments is greatly affected by the environment, and the control effect is not ideal

Fourth, the large-scale application of chemical agents does not meet the strategic needs

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