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Method for quantitatively evaluating natural control effect of field surface predatory natural enemies on wheat aphid population

A quantitative evaluation and wheat aphid technology, applied in botany equipment and methods, applications, horticulture, etc., can solve the problems of predators regulating the population and community structure, reducing the growth and activity of prey, increasing predation, etc., to avoid Effects of human interference, outstanding accuracy and scientificity, and strong operability

Pending Publication Date: 2019-06-25
AGRO ENVIRONMENTAL PROTECTION INST OF MIN OF AGRI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, evaluating the role of predators in regulating population and community structure is often difficult
Chinese patent documents CN102260507A and CN106447512A disclose two kinds of field detection methods of the control ability of predatory natural enemies to rice planthoppers, both of which adopt the field cage method, although quantitative evaluation of the control ability of predatory natural enemies to rice planthoppers in the field can be realized, but Caging can change the internal microenvironment (such as light intensity, temperature, humidity, and wind speed, etc.), and these changes may change the physiological state of caged plants and the behavior and development of herbivores. Lower temperatures reduce the growth and activity of prey , thus increasing the probability of being prey
In addition, enclosures can also alter the behavior of predators or prey, confining predators and prey together within enclosures may increase predation rates as predators cannot migrate out and thus repeat previously searched locations

Method used

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  • Method for quantitatively evaluating natural control effect of field surface predatory natural enemies on wheat aphid population
  • Method for quantitatively evaluating natural control effect of field surface predatory natural enemies on wheat aphid population

Examples

Experimental program
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Embodiment 1

[0015] Example 1: Quantitative evaluation of the biological control effect of predatory natural enemies on the surface of wheat aphids without the application of pesticides

[0016] In a wheat field without pesticide application in Qihe County, Shandong Province, 10 square sample plots (length 2m×width 2m) were drawn, and the distance between each sample plot was not less than 10m. as a passing area. Bamboo poles (height 1m) were inserted in the four corners of the enclosed area, surrounded by 60-mesh nylon nets (height 45cm) and buried at a depth of 15cm, so that arthropods moving on the surface were completely blocked; bamboo poles (height 1m) were also inserted in the four corners of the passage area. But there is no nylon net to enclose, and the arthropods that move on the surface can come in and out freely.

[0017] On April 30 (starting period of wheat aphid) and May 19 (peak growth period of wheat aphid), two wheat aphid population surveys were arranged. Cross-samplin...

Embodiment 2

[0021] Example 2: Quantitative evaluation of the biological control of wheat aphids by predatory natural enemies on the surface of intensive wheat fields

[0022] In a wheat field where pesticides are normally applied in Qihe County, Shandong Province, 10 square sample plots (2m in length x 2m in width) were drawn, and the distance between each sample plot was not less than 10m. as a passing area. Bamboo poles (height 1m) were inserted in the four corners of the enclosed area, surrounded by 60-mesh nylon nets (height 45cm) and buried at a depth of 15cm, so that arthropods moving on the surface were completely blocked; bamboo poles (height 1m) were also inserted in the four corners of the passage area. But there is no nylon net to enclose, and the arthropods that move on the surface can come in and out freely.

[0023] Two population surveys of wheat aphids were arranged on April 28 (starting period of wheat aphid) and May 20 (peak growth period of wheat aphid). Cross-samplin...

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Abstract

The invention discloses a method for quantitatively evaluating the natural control effect of field surface predatory natural enemies on a wheat aphid population. The quantitative evaluation method comprises the steps of test area setting, wheat aphid population survey and biocontrol index calculation. The method is completely carried out under the condition of a field environment, serious human interference of a classic cage method on field tests is avoided, evaluation results can completely reflect the control effect of the earth surface predatory natural enemies on wheat aphids in a farmlandecosystem, the control effect difference of the earth surface predatory natural enemies of the farmland ecosystem on the wheat aphids under different areas or under different management can be objectively reflected, and the accuracy and scientificity of evaluation results are prominent. The method is simple and feasible, low in cost and high in operability; the method has very good applicabilityin quantitative evaluation of the biological prevention and control effect of the field surface predatory natural enemies on the wheat aphid population.

Description

technical field [0001] The invention belongs to the field of agricultural biological prevention and control detection, and relates to a method for quantitatively evaluating the natural control effect of predatory natural enemies on the field surface on wheat aphid populations. Background technique [0002] The wheat aphid sucks the sap of wheat plant stems, leaves and young ears with its piercing and sucking mouthparts, and secretes honeydew, which causes mold growth and affects the normal development of wheat, and also spreads wheat virus diseases, resulting in reduced crop yield and quality. Due to the lack of aphid-resistant varieties, for a long time, the prevention and control of wheat aphids has mainly relied on chemical pesticides, resulting in the continuous increase in the amount of chemical pesticides and the increasingly serious abuse of pesticides. While controlling wheat aphids, it has also led to environmental pollution, increased planting costs, and natural ene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G13/00
Inventor 张艳军杨殿林王慧赵建宁
Owner AGRO ENVIRONMENTAL PROTECTION INST OF MIN OF AGRI
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