Red-shouldered ladybug diapause relief method

Abstract

The invention discloses a leis dimidiata diapause relieving method which comprises the following steps: 1) selecting leis dimidiata imago in the diapause condition as diapause relieving objects; 2) placing the leis dimidiata selected in the step 1) under the diapause relieving environment, and through regulation and control of combination of everyday lighting duration, temperature and total lighting duration, enabling the leis dimidiata to lay eggs so as to relieve diapause, wherein the everyday lighting duration adopts photoperiod (8-14)L:(16-10)D, the temperature is 24 DEG C, and the treatment continues for 72 h. Through the control of environmental factor and the combination of necessary treatment measures, the accurate control on growth start time of an excellent predatory natural enemy insect, namely the leis dimidiata, is realized, the diapause relieving rate can reach more than 98%, and technical support is provided for annual mass production of the leis dimidiata.

Description

technical field [0001] The invention relates to a method for relieving diapause of red-shouldered ladybug, through which the vitality of adult red-shouldered ladybug that has been diapaused can be restored, including reproductive ability, predation ability, and ability to fly and multiply, so as to ensure the control of natural enemy products. Pest efficacy. 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 agri...

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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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