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System and method for quickly testing and analyzing deposition and drift performances of pesticide

A technology for testing and analyzing pesticides, applied in the direction of analyzing materials, instruments, etc., can solve the problems of high price, small sampling quantity, error, etc., and achieve the effect of low cost, low water absorption and strong adaptability

Active Publication Date: 2014-02-05
南京林卫生态农业科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the size and coverage of droplets are usually analyzed by microscopy, manual measurement, machine vision analysis, and optical instrument application. Disadvantages such as slow speed, expensive price, short storage time of sampling water-sensitive paper, and low pixel resolution, resulting in huge errors in spray deposition and drift analysis

Method used

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  • System and method for quickly testing and analyzing deposition and drift performances of pesticide
  • System and method for quickly testing and analyzing deposition and drift performances of pesticide
  • System and method for quickly testing and analyzing deposition and drift performances of pesticide

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Embodiment Construction

[0036] 1. This method selects the following characteristic parameters to analyze and evaluate the performance of pesticide deposition and drift.

[0037] D. v10 : The cumulative distribution of the droplet volume is 10% of the droplet diameter, that is, the volume of the fog particles smaller than this droplet diameter accounts for 10% of the total volume of the fog particles, and the unit is μm. such as D v10 =120μm means that on the tested sampling paper, particles with a particle size of less than 120μm account for 10% of the total volume, D v10 Indicates the ease of drifting of the droplets. In general, the droplets below 100 μm are prone to greater drifting.

[0038] D. v50 : The cumulative distribution of the droplet volume is 50% of the droplet diameter, that is, the volume of the fog particles smaller than this droplet diameter accounts for 50% of the total volume of the fog particles, also known as the volume median diameter (VMD), referred to as VMD, and the unit ...

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Abstract

The invention provides a system and method for quickly testing and analyzing the deposition and drift performances of pesticide. The system and the method are capable of quickly, accurately, economically and effectively analyzing the deposition and drift characteristics of fog drops. The system comprises white photographic paper and a scanner, wherein the white photographic paper is used for receiving the fog drops; the output of the scanner is connected with a computer. The method comprises the following steps: spraying a pigmented medium from a spraying nozzle; receiving the fog drops, which are sprayed from the spraying nozzle, through the white photographic paper, and depositing the fog drops (i) on the photographic paper to form color spots; scanning the photographic paper through the scanner to obtain a scanning image, and calculating to obtain the actual area (Ti) of each color spot in a scanning region, wherein i is equal to 1,..., N; calculating the actual diameter of each fog drop according to a formula that di is equal to 1.06Ti<0.455>, and calculating the volume (Vi) of each fog drop; reflecting the size of the fog drops which are deposited on the photographic paper according to the corresponding diameter (Dv50) of each fog drop when a cumulative distribution function of the volume of the fog drops is 50 percent; and reflecting the coverage rate of the medium on the photographic paper according to the area of each color spot in the scanning region and / or the area of the scanning region.

Description

technical field [0001] The invention relates to a method for testing and analyzing pesticide deposition and drift performance. Background technique [0002] In the process of aerial spraying and ground spraying, it is necessary to ensure that pesticides can be evenly deposited and covered in the leaves and canopies of crops or trees, and to reduce non-target drift loss, that is, to improve the efficiency of pesticide use and reduce the loss of pesticides to pollute the environment. The most important issue is the performance of plant protection machinery and the rationality of spraying technology. The most important evaluation index is spray quality, including spray deposition, drift and droplet coverage. Pesticide deposition refers to the amount of pesticide deposited per unit area on the target (crops, trees, diseases, insect pests, targets that require pesticide landing) after pesticide application. Pesticide drift refers to a physical movement of pesticide droplets or p...

Claims

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Application Information

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IPC IPC(8): G01N15/04G01N15/00
Inventor 张慧春郑加强周宏平
Owner 南京林卫生态农业科技有限公司
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