A kind of determination method for trapping and killing effect of Spodoptera litura adults

Abstract

The invention discloses a method for measuring the trapping and killing effect of Spodoptera litura adults, which comprises the following steps: (1) Design of test plots: prepare several closed test plots without Spodoptera litura occurrence, divide the test plots into trapping and killing treatment zones and Blank control area; (2) Host plant planting: Spodoptera litura host plants were uniformly planted in each test plot, and the size and growth of the Spodoptera litura host plants were consistent; (3) Trapping treatment; (4) Pupa insertion; (5) Data recording; (6) Calculation of trapping effects. The present invention eliminates the uncertain factors of outdoor evaluation, and designs a larger closed community, which can not only meet the physiological life, mating and oviposition activities of Spodoptera litura, but also reflect the actual production situation, except that Spodoptera litura cannot fly outwards. The other conditions outside of flying in and out are basically consistent with the natural state, which ensures that the test data is close to the natural state, which not only reduces the area of ​​the field test, but also shortens the period of the field test.

Description

technical field [0001] The invention belongs to the field of trapping and killing agent evaluation, and particularly relates to a method for measuring the trapping and killing effect of Spodoptera litura adults. Background technique [0002] Spodoptera litura Fabricius belongs to Lepidoptera, Spodoptera, also known as Spodoptera litura. A total of 109 families and 389 species. Spodoptera litura can feed on the leaves, flower buds, flowers and fruits of plants. The newly hatched larvae eat the lower epidermis and mesophyll of the leaves. After being damaged, the epidermis of the leaves becomes transparent spots; lower main vein. Spodoptera litura is the main pest of soybean in southern my country. [0003] At present, the main method to control Spodoptera litura is still to use chemical pesticides. However, the large-scale use of chemical pesticides over the years has brought about the reduction of the number of natural enemies, the enhancement of pest resistance, environm...

AI Technical Summary

Problems solved by technology

[0006] 2. Commonly used sexual luring techniques are generally to trap and kill male insects. It is not easy to determine whether the trapped male insects have mated with female insects before being trapped. To achieve the control effect, and the general practice is to count the number of trapped males as the control effect

[0007] 3. Light trapping and killing technology, it is not easy to determine whether the adults have completed mating or laying eggs before they are trapped by the lamp; if the male insects have completed mating or the female insects have completed laying eggs, whether it is trapped or not has no effect on the control effect , generally only the number of trapped adults can be counted

[0008] 4. In production, the damage of the target pests in the control field is often investigated as the control effect. The problem is that the adults can fly, and it is not sure whether it is caused by the target pests flying from other areas or the target pests in the control area.

However, this method of determination does not distinguish between male and female test insects, and there are still technical problems in the above-mentioned 2nd and 3rd points

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