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Method for killing larva of rice water weevil and device

A technology for rice water weevil and larvae, which is applied in the field of insecticidal methods and devices, can solve the problems of no physical control method for larvae, poor control effect of larvae pesticides, unsatisfactory effect, etc., and achieve good use effect, low cost and simple method Effect

Inactive Publication Date: 2011-08-17
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no physical control method for larvae living in the roots of rice plants, and chemical control is not effective against larvae because it is difficult for the liquid to penetrate into the root soil.
The above method is not only costly, but also unsatisfactory

Method used

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  • Method for killing larva of rice water weevil and device
  • Method for killing larva of rice water weevil and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1 of the present invention: the method for killing rice water weevil larvae, the voltage of 12V is converted into the direct current of 6000V by PWM technology and output, utilize the electric current of output to carry out convection between electrodes, make this electric current can be in In the designated area, the rice water weevil larvae gathered at the root of the rice plant were shocked for 10 minutes, so that their body fluids were conductive, reversed and exuded to death, with an effective rate of 93%.

[0017] The structure of the device for killing rice water weevil larvae is as follows: figure 1 As shown, including power supply 1 (power supply adopts existing portable power supply, such as batteries, storage batteries, etc.), connect transducer 2 to power supply 1 (use conventional commercially available transducers), and connect transducer 2 to transducer 2 Connect the electrode 3; the length of the electrode 3 is 20 cm.

Embodiment 2

[0018] Embodiment 2 of the present invention: the method for killing rice water weevil larvae, the voltage of 16V is converted into the direct current of 8000V by PWM technology and output, utilize the electric current of output to carry out convection between electrodes, make this electric current can be in In the designated area, the rice water weevil larvae gathered at the root of the rice plant were given an electric shock for 5 minutes, so that the body fluid conduction reversed and exuded to death, with an effective rate of 97%.

Embodiment 3

[0019] Embodiment 3 of the present invention: the method for killing rice water weevil larvae, the voltage of 36V is converted into the direct current of 10000V by PWM technology and output, utilize the electric current of output to carry out convection between electrodes, make this electric current can be in In the designated area, the rice water weevil larvae gathered at the roots of rice plants were given electric shocks for 5 minutes, so that their body fluids reversed and exuded to death, with an effective rate of 100%.

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Abstract

The invention discloses a method of utilizing high-voltage current to act on larva of rice water weevil gathering at the roots of rice plants in a designated area, so as to make the body fluid to be conductive, flow back and bleed out, causing the larva to die. The method utilizes the characteristics of PWM, the power of safety voltage is amplified at the roots of the rice plants, so that the voltage can act on the bodies of the rice water weevil, and make the body fluid to be conductive, flow back and bleed out, causing the larva to die. Indoor and field experiments prove that the effective rate is up to 90 percent to 100 percent. The invention has the advantages that the method is simple, the device employing the method is easy to fabricate, the cost is low, and the effect of use is good.

Description

technical field [0001] The invention relates to an insecticidal method and device, in particular to a method and device for killing rice water weevil larvae. Background technique [0002] Rice water weevil is a genus of Coleoptera, Weevilidae, Swamp Elephant Subfamily Water Weevil. It is a phytosanitary pest stipulated by my country, and is listed as one of the 100 most threatening invasive alien organisms in the world by the International Union for Conservation of Nature. It is a major potential threat to rice production. area with catastrophic consequences. Rice water weevil first occurred in the United States and was introduced to Japan from the United States in 1976. It was first discovered in Tanghai County, Hebei Province in 1987 in China. Currently 16 provinces have distributed hazards. [0003] Rice water weevil mainly harms rice. Both adults and larvae can harm rice. Adults gnaw on young rice leaves and leave the lower epidermis to form vertical stripes; larvae m...

Claims

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Application Information

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IPC IPC(8): A01M1/22H05C1/04
Inventor 陈文龙
Owner GUIZHOU UNIV