Breeding method for increasing percentage of females in neoseiulus californicus offsprings

Abstract

The invention belongs to the technical field of biological control, and discloses a breeding method for increasing the percentage of females in neoseiulus californicus offsprings. The breeding methodincludes the following steps that firstly, spider mites are fed, then, neoseiulus californicus is fed with the spider mites as a mite source, and the conditions of feeding neoseiulus californicus include that illumination time is 10-14 h during a light cycle, the highest temperature is 23-32 DEG C, the lowest temperature is 13-25 DEG C, and the difference between the highest temperature and the lowest temperature is 8-13 DEG C; spawn laid by female neoseiulus californicus is collected and placed under the same condition to be fed into adult mites. The breeding method for increasing the percentage of the females in the neoseiulus californicus offsprings has the advantages that the percentage of the females in the artificially fed neoseiulus californicus offsprings is significantly increased, the population quantity is increased rapidly, the population breeding quantity in a unit interval is greatly increased, commercial production is promoted, and important bases are provided for areasand seasons of producing and releasing neoseiulus californicus. Neoseiulus californicus offspring breeding is rapid so that an ideal quantity can be reached within a short time without later rejuvenation or periodical putting or other operation, and economic value of neoseiulus californicus natural enemy commodities can be improved.

Description

technical field [0001] The invention belongs to the technical field of biological control, and in particular relates to a breeding method for increasing the female ratio of the offspring of Neoseiius californica. Background technique [0002] Neoseiulus californicus belongs to the family Phytoseiidae. It is widely distributed and has strong adaptability. It is an important natural enemy of spider mites. It has been developed as a natural enemy commodity abroad and is mainly used in the biological control of various pest mites. Due to the wide feeding range of Neoseius californica, it can prey on a variety of harmful mites, and can also catch some small insects. It can be used to solve the problems of harmful mites and pests in the production process of various plants, and has a great commercial prospect. The sex ratio and fecundity of the offspring of Neoseius californica are important parameters to describe the germplasm, and also an important index to measure the quality o...

AI Technical Summary

Problems solved by technology

[0003] Neoseius californica likes to live in a living environment of 10-33°C, but short-term low temperature is not enough to make it fatal, and the current research on increasing the population of Neoseius californica and the economic value of this natural enemy commodity, It mainly focuses on the following three aspects: one is to achieve different effects through the selection of different feeding devices, mainly adding acaroid mites and pollen to supplement nutrition in various shapes of feeding racks or feeders made of gauze and skeletons Carry out group breeding. Compared with natural prey, the survival rate of predatory mites under this method is lower than that of natural prey, the reproduction rate is not high enough, and the vitality cannot fully meet the test requirements. Extensive conservation breeding, and it is difficult to achieve the ideal number in a short period of time

The second is to achieve the purpose of continuous damage control by controlling the ratio of feeding predatory mites to field pest mites. This method can prolong the survival time of predatory mite populations to a certain extent, but it still needs regular feeding

The above three types of methods all have certain technical defects, and cannot meet the needs of the existing environment for the natural enemy product Neoseius californica.