A method for evaluating the persistence period and rain erosion resistance of forest tree branch disease control chemicals

A rainwater-resistant and long-lasting technology, which is used in the detection of insecticidal active ingredients and effective sterilization after chemical pesticides are applied and dried. Effect

Active Publication Date: 2022-01-28
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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  • A method for evaluating the persistence period and rain erosion resistance of forest tree branch disease control chemicals
  • A method for evaluating the persistence period and rain erosion resistance of forest tree branch disease control chemicals
  • A method for evaluating the persistence period and rain erosion resistance of forest tree branch disease control chemicals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1 Evaluation of Rainwater Erosion Resistance of Coating Agent

[0033] 1. Configuration of the branch coating agent: In order to develop the apple branch disease coating agent, Nippon Shinshiliyaguang interior wall latex paint and lime slurry (compounded with quicklime and water in a ratio of 1:5, adding 2% 25% pyraclostrobin EC (Kairun) was directly mixed into each group, the volume ratio of the agent and the substrate was 1:400, and the mixture was stirred evenly , respectively made two branch and trunk coating agents for subsequent performance tests.

[0034]2. Application and sampling: take the kraft paper card with a size of 9cm×5cm as the attachment, number the card, put it in a drying box, dry it at 35℃ for 2 hours, and weigh it one by one; Coated on the card, dried under natural conditions for 24 hours, transferred to a drying box for 2 hours at 35°C, and weighed again to calculate the dry weight of the coating agent on each card; They were fixed on th...

Embodiment 2

[0040] The extraction and detection of active ingredient in embodiment 2 coating agent

[0041] 1. Configuration of branch coating agent:

[0042] In order to develop the coating agent for diseases of apple branches, Nippon Shinshiliyaguang interior wall latex paint, beautiful piles from Qingdao Zhongda Co., Ltd., and lime slurry (compounded with quicklime and water in a ratio of 1:5, added 2% starch paste to increase its adhesion) and starch paste (modified starch and water were mixed with water at a ratio of 1:14 and then boiled with water) were used as substrates respectively, and were divided into four experimental groups, each group was directly mixed with 25% pyraclostrobin into the substrate. Ester emulsifiable concentrate (Kairun), the ratio of the base to the agent is 1:400, and after mixing, stir evenly to make a branch coating agent, and directly coat the apple branches.

[0043] 2. Application and sampling

[0044] The non-woven fabric is used as the attachment o...

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Abstract

The invention discloses a method for evaluating the lasting effect period and the rainwater erosion resistance ability of forest tree branch disease prevention and control agents. On the surface of a vertically arranged rod-shaped support; evenly coat or spray the drug on the attachment to form a drug film layer; periodically directly pick, cut or punch samples of the drug film layer of the same specification, and test each sample Mark and store at low temperature; based on the quality of the drug film layer and the content of the active ingredient in the first sampling sample, calculate the loss of the drug film layer in the sample sheet and the loss amount of the active ingredient in the drug film layer at each sampling to evaluate the drug Excellent rain erosion resistance and duration. Compared with the field test method, the above evaluation method is simple to operate, the practical evaluation period is short, the cost is low, and the evaluation results are accurate. It can be widely used to evaluate the rain erosion resistance and persistence period of various branch disease control agents.

Description

technical field [0001] The invention relates to the field of chemical pesticide detection and evaluation, in particular to a detection technology for effective sterilization and insecticidal active ingredients after the chemical pesticide is coated and dried. Background technique [0002] Fruit trees and forest tree branches are harmed by a variety of pests and diseases, such as apple tree rot, ring disease, cotton aphid, branch longhorn, anthracnose of various fruit trees, poplar canker, etc., which can cause dead branches and dead branches. Trees, gardens and forests are 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 spanning a year, and some even annual 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 budding of the tree i...

Claims

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Application Information

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Patent Type & AuthorityPatents(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