Method for evaluating lasting period and rain wash resistance of disease control drug of tree branches and trunks

A rain-resistant and long-lasting technology, which is applied to the detection of insecticidal active ingredients and the effective sterilization of chemical pesticides after drying, can solve the problems of evaluating the long-lasting effect, and achieve short evaluation period, simple operation, and low requirements for experimental conditions Effect

Active Publication Date: 2019-07-19
QINGDAO AGRI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there is currently no technology and method that can accurately evaluate the resistance to rain erosion and the persistence period of various agents on the branches.
Although field experiments can be an effective way to evaluate the insecticidal and bactericidal effects of various pesticides, field experiments require one or several growing seasons for pesticides for the control of branch diseases and insect pests. In addition to the influence of various factors, it is difficult to evaluate its exact duration in the short term

Method used

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  • Method for evaluating lasting period and rain wash resistance of disease control drug of tree branches and trunks
  • Method for evaluating lasting period and rain wash resistance of disease control drug of tree branches and trunks
  • Method for evaluating lasting period and rain wash resistance of disease control drug of tree branches and trunks

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Experimental program
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Effect test

Embodiment 1

[0032] Embodiment 1 Coating agent rainwater erosion resistance evaluation

[0033] 1. Configuration of branch coating agent: In order to develop coating agent for apple branch disease, Nippon New Shili Yaguang interior wall latex paint and lime slurry (quicklime and water are prepared in a ratio of 1:5, adding 2% Starch paste to increase its adhesion) as the matrix, divided into two experimental groups, directly mixed with 25% pyraclostrobin EC (Kairun) into each group, the volume ratio of the agent and the matrix was 1:400, mixed and stirred evenly , respectively made two branch coating agents, and carried out subsequent performance tests.

[0034]2. Application and sampling: Use kraft paper cards with a size of 9cm×5cm as attachments, number the cards, put them in a drying box, and weigh them one by one after drying at 35°C for 2 hours; Apply it on the card, dry it under natural conditions for 24 hours, transfer it to a drying oven at 35°C and dry it for 2 hours, then weigh...

Embodiment 2

[0040] Extraction and detection of active ingredient in the coating agent of embodiment 2

[0041] 1. Configuration of branch coating agent:

[0042] In order to develop a coating agent for apple branches and stems, use Nippon New Shili Yaguang interior wall latex paint, Qingdao Zhongda company's Liangzhu, and lime slurry (quicklime and water are prepared in a ratio of 1:5, and 2% starch is added) paste to increase its adhesion), starch paste (modified starch and water mixed at a ratio of 1:14 and then boiled with water) were used as substrates respectively, and were divided into four experimental groups, and each group was directly mixed with 25% pyrazole ether bacteria into the substrate Ester emulsifiable oil (Kairun), make the ratio of base and agent 1:400, mix and stir evenly to make branch coating agent, and directly coat apple branches.

[0043] 2. Application and sampling

[0044] The non-woven fabric is used as the attachment of the medicament, and the apple tree tr...

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Abstract

The invention discloses a method for evaluating the lasting period and the rain wash resistance of a disease control drug of tree branches and trunks. The method comprises the following steps: selecting a film material similar to or approximate to the surface smoothness of the branches and trunks as an attachment, and fixing the attachment on the surface of a vertically arranged rod-shaped supporting object; uniformly coating or spraying the drug on the attachment to form a drug film layer; periodically and directly picking, cutting or getting drug film layer sample pieces with the same specification, marking the sample pieces, and storing the same at a low temperature; and respectively using the mass of the drug film layer sample pieces and the content of active ingredients during the first sampling as reference, calculating the loss amount of the drug film layers in the sample pieces and the loss amount of the active ingredients in the drug film layers during every sampling so as toevaluate the lasting period and the rain wash resistance of the drug.

Description

technical field [0001] The invention relates to the field of detection and evaluation of chemical pesticides, in particular to the detection technology of effective bactericidal and insecticidal active ingredients after the chemical pesticides are dried. Background technique [0002] Fruit trees and forest branches are harmed by various diseases and insect pests, such as apple tree rot, ring spot, cotton aphid, branch beetle, anthracnose of various fruit trees, poplar canker, etc., which can cause dead branches, dead branches, etc. Trees, gardens and forests were destroyed, causing great damage to fruit trees and forest trees. The damage period of various branch diseases and insect pests is very long, some as long as three months, some span one year, and some even perennial damage. For example, various diseases on the branches of fruit trees and forest trees have a long infection period of pathogenic bacteria. In the northern region, from the germination of trees in March ...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G01N5/04G01N30/02G01N30/06
CPCG01N5/04G01N30/02G01N30/06
Inventor李保华马俊欢李栋李平亮董向丽
OwnerQINGDAO AGRI UNIV