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A method for quantitatively evaluating the predation effect of field surface natural enemies on wheat aphids

A quantitative evaluation, wheat aphid technology, applied in data processing applications, instruments, calculations, etc., can solve the difficulty of predators in regulating population and community structure, change the physiological state behavior and development of plants in cages, and reduce prey growth and activities. problems, and achieve the effect of avoiding human interference, outstanding accuracy and scientificity, and low cost

Pending Publication Date: 2019-06-14
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 Nylon netting will change the internal microenvironment (such as light intensity, temperature, humidity and wind speed, etc.), these changes may change the physiological state of the caged plants and the behavior and development of herbivores, and the lower temperature reduces the growth of prey and activity, thus increasing the probability of predation
Additionally, enclosures can also alter the behavior of predators or prey, confining predators and prey together within nylon mesh enclosures may increase predation rates as predators cannot migrate out and thus repeat previously searched locations

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1: Quantitative evaluation of the predation effect of surface natural enemies on wheat aphids without the application of pesticides

[0017] The experimental site was set up in a wheat field without pesticide application in Qihe County, Shandong Province. On April 25, May 18, and June 12, the prey-attracting devices were placed in the center of the wheat field, and each batch was crossed at 5 points. A total of 5 trapping and predating devices are arranged in the layout, and the distance between the devices is not less than 10 meters. In each device, 16 wheat aphids are fixed on the trapping and predating board. In each experiment, 24 hours after the installation of the device, the prey of the wheat aphid was predated or attacked by natural enemies on the surface. According to the formula PI = Na / Nt, calculate the intensity PI of the wheat aphid prey being predated / attacked.

[0018] Table 1 Predation / attack statistics of surface natural enemies on wheat aphi...

Embodiment 2

[0021] Example 2: Quantitative evaluation of the predation effect of surface natural enemies on wheat aphids in intensive wheat fields

[0022] The test site was set up in an intensive wheat field in Qihe County, Shandong Province. The predator was placed in the center of the wheat field on April 28, May 20, and June 15, respectively, and each batch was arranged in a 5-point cross A total of 5 trapping and predating devices were arranged, and the distance between the devices was not less than 10 meters. In each device, 16 wheat aphids were fixed on the trapping and predating boards. In each experiment, 24 hours after the installation of the device, the prey of the wheat aphid was predated or attacked by natural enemies on the surface. According to the formula PI = Na / Nt, calculate the intensity PI of the wheat aphid prey being predated / attacked.

[0023] Table 2 Statistics of predation / attack of surface natural enemies on wheat aphid prey

[0024] period

[0025]...

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Abstract

The invention discloses a method for quantitatively evaluating the predation effect of field surface natural enemies on wheat aphids. The quantitative evaluation method comprises the steps of arranging an inducing and preying device, carrying out preying / attack investigation on the wheat aphid prey and calculating the preying / attack intensity of the wheat aphid prey. The method is carried out under the field environment condition; severe human interference of a classic nylon net cage method on a field test is avoided, the predation effect of ground surface enemies on the wheat aphids in the farmland ecosystem is quantitatively evaluated, the predation effect of the ground surface enemies on the wheat aphids in the farmland ecosystem in different regions or under different managements is objectively reflected, and the accuracy and scientificity of an evaluation result are outstanding. The method disclosed by the invention is simple and feasible, low in cost and high in operability, andhas good applicability in quantitative evaluation of the predation effect of field surface natural enemies on the wheat aphids.

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 predation effect of natural enemies on the field surface on wheat aphids. Background technique [0002] Wheat aphids suck the sap of wheat plants with their piercing-sucking mouthparts, and secrete honeydew to cause mold growth, seriously affecting the normal growth of wheat, and spreading wheat virus diseases, resulting in reduced grain production and quality of agricultural products. Due to the lack of aphid-resistant wheat varieties, for a long time, the prevention and control of wheat aphids has mainly relied on chemical pesticides. The increasing amount of chemical pesticides and the abuse of pesticides are becoming more and more serious. While controlling wheat aphids, it has led to environmental pollution, increased planting costs, and natural enemies. Different degrees of drug resistance and w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q50/02
Inventor 张艳军赵建宁杨殿林王慧
Owner AGRO ENVIRONMENTAL PROTECTION INST OF MIN OF AGRI
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