Diapause induction method of red-shouldered ladybird

Abstract

The invention discloses a diapause induction method of harmonia dimidiate. The diapause induction method comprises the steps of 1) determining the diapause control sensitive stage of the harmonia dimidiate as adjusts just after eclosion and selecting the harmonia dimidiate at the stage as the diapause induction objects, and 2) putting the harmonia dimidiate selected in the step 1) in a diapause induction environment and enabling the harmonia dimidiate to enter the diapause state by regulating and controlling the combination of illumination time each day, temperature and total induction time, wherein the illumination time each day is photoperiod (8-10)L: (16-14) D, the temperature is in the range of 13-15, and the continuous induction time is greater than or equal to 192 hours. The diapause induction method of the harmonia dimidiate is capable of realizing accurate control on the excellent natural predatory enemy insect harmonia dimidiate by controlling the environmental factors in combination necessary treatment measures; the diapause rate can be about 95%; technical guarantee is provided for annual large-scale production of the harmonia dimidiate.

Description

technical field [0001] The invention relates to a method for inducing diapause of the red-shouldered ladybug, through which the adults of the red-shouldered ladybug can develop slowly, enter the diapause stage, and delay the oviposition time. Background technique [0002] The crop yield loss caused by agricultural diseases and insect pests in my country is 10-15% every year. Realizing the scientific control of agricultural diseases and insect pests has important economic and social benefits for ensuring the implementation of the national food security strategy and promoting agricultural high yields. Aphids are the largest pests in agricultural production, and the global losses caused by aphids are nearly 5 billion US dollars each year. At present, chemical insecticides are mainly used to prevent and control aphids. [0003] In the process of controlling agricultural pests, if we blindly rely on chemical pesticides, it will bring a series of negative problems in terms of ecol...

AI Technical Summary

Problems solved by technology

[0004] At present, a bottleneck problem in the industrialization of natural enemy insects at home and abroad is: natural enemy insects have a long propagation cycle and short survival period, and it is difficult for the product delivery time to coincide with the occurrence period of pests, which often leads to the death of natural enemies before the occurrence of pests, or the occurrence of pests. Occurs when no natural enemy product is available

However, in actual production and application, there are often problems such as short multiplication cycle, long-term storage and timely application of products, and diapause of adults, which affect the multiplication efficiency, which has become a technical bottleneck restricting the large-scale production and application of red-shouldered ladybug.

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