Method for assisting migration of predatory natural enemies from wheat fields to maize fields

Abstract

The invention belongs to the technical field of biological control of agricultural pests, and particularly relates to a method for assisting the migration of predatory natural enemies from wheat fields to maize fields. The method of assisting the migration of predatory natural enemies from wheat fields to maize fields is implemented by planting cnidium monnieri zones beside wheat-maize rotation fields, wherein the ratio of the number of rows of wheat zones to the number of rows of cnidium monnieri zones is 40-80:1 or the ratio of the number of rows of maize zones to the number of rows of cnidium monnieri zones is 15-45:1, the wheat zones, the maize zones and the cnidium monnieri zones are uniform, the row spacing of the wheat zones is 18-25cm, the row spacing of the maize zones is 50-70cm,and the row spacing of the cnidium monnieri zones is 33-40cm. The method for assisting the migration of predatory natural enemies from wheat fields to maize fields provided by the invention is efficient and simple, and can increase the income of farmers. Moreover, the seeds of cnidium monnieri will not diffuse into the farmland to interfere with the growth of crops in the farmland, and thus, themethod is of high safety.

Description

technical field [0001] The invention belongs to the technical field of biological control of agricultural pests, and in particular relates to a method for assisting the migration of predatory natural enemies from wheat fields to corn fields. Background technique [0002] At present, the prevention and control of pests in agriculture still relies on chemical control to a large extent, and the large-scale use of chemical pesticides in chemical control has caused three major problems: the increase of pest resistance, the rampant pests, the pesticide residues in food exceeding the standard, and the farmland itself. Natural regulation is severely reduced. Biological control reduces the use of chemical pesticides by using biocontrol microorganisms and natural enemy insects to control pests. However, in the past, biological control mainly focused on crop habitats, and used physical, chemical and biological methods to control pests, which were rarely used. The method of planting fu...

AI Technical Summary

Problems solved by technology

[0002] At present, the prevention and control of pests in agriculture still relies on chemical control to a large extent, and the large-scale use of chemical pesticides in chemical control has caused three major problems: the increase of pest resistance, the rampant pests, the pesticide residues in food exceeding the standard, and the damage of farmland itself. Severely reduced natural regulation

Wheat-corn rotation is the crop planting mode with the largest planting area in North China. However, under the background of agricultural intensification in my country, the proportion and area of ​​non-crop habitats next to crop fields have gradually declined and tended to decline at an accelerated rate. And before corn emerges, natural enemies in wheat fields lack habitat plants and food sources, resulting in a rapid decline in their species and numbers, and then the function of transferring to corn or other crops for pest control is seriously insufficient

At present, in the North China region of my country, there is no report on the technology of relocating the predatory natural enemies of "wheat-jade".

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