Degradable spraying agent and process for enhancing disease resistance of Hongyang kiwi fruit plants

Abstract

The invention relates to a degradable spraying agent and process for enhancing disease resistance of Hongyang kiwifruit plants, and the degradable spraying agent is prepared by taking environment-friendly degradable natural polysaccharides or natural polymers, water-soluble high-molecular polymers, a coalescing agent, a wetting agent, a bactericide and deionized pure water as raw materials through weighing, blending, grinding, compounding, sealing and packaging. The prepared degradable spraying agent can be sprayed and smeared, the pesticide effect of the Bordeaux mixture or lime sulfur is enhanced, the usage amount of the Bordeaux mixture or lime sulfur is greatly reduced, and the degradable spraying agent has a good effect on enhancing the canker and root rot resistance of the Hongyang kiwi fruit plants.

Description

Technical Field

[0001] The invention relates to a degradable spraying agent and process for enhancing the disease resistance of Hongyang kiwifruit plants. Background Art

[0002] Among the Chinese varieties, the delicious varieties are severely affected by diseases. For example, 'Hongyang' kiwifruit is vulnerable to diseases such as canker and root rot. The output of kiwifruit in China has been increasing continuously. Especially, the red-fleshed series represented by Hongyang kiwifruit has developed rapidly, and its plants are easily affected by canker, which causes great harm to production. In addition, low-temperature freezing damage, wounds formed by strong wind blowing and collision, weak tree vigor, improper fertilization, unreasonable pruning, and incomplete winter orchard cleaning have increased the incidence of canker. The high temperature and high humidity conditions during the peak growth period of new shoots are also prone to canker. To effectively prevent and control canker and root rot of Hongyang kiwifruit, it is necessary to comprehensively consider and take corresponding new prevention and control measures. Summary of the Invention

[0003] The invention prepares a degradable spraying agent for enhancing the disease resistance of Hongyang kiwifruit plants by using environmentally friendly and degradable natural polysaccharides or natural polymers, water-soluble polymer polymers, film-forming aids, wetting agents, fungicides, and deionized pure water as raw materials.

[0004] The invention is a process for a degradable spraying agent for enhancing the disease resistance of Hongyang kiwifruit plants. The process includes weighing, modulating, grinding, compounding, and sealed packaging, which are specifically as follows:

[0005] Weighing Weigh the raw materials of natural polysaccharides or natural polymers, water-soluble polymer polymers, film-forming aids, wetting agents, and fungicides in proportion, and control the amount of the raw materials excluding fungicides in the product to be 15%-45%.

[0006] Modulating Mix the weighed natural polysaccharides or natural polymers with water-soluble polymer substances evenly; then fully stir and dissolve them with deionized pure water to obtain the slurry.

[0007] Grinding Process the slurry with a sand mill or a three-roll mill to make its fineness reach 100 meshes or more to obtain the base material.

[0008] Compounding Fully stir and mix the weighed film-forming aids, wetting agents, fungicides, and the slurry to obtain the spraying paint; the fungicide added during compounding is one of the commercial or self-made Bordeaux mixture or lime sulfur mixture, and its mass fraction in the product is 0.05%-0.10%.

[0009] Sealed Packaging Quantitatively fill the spraying paint into a clean and dry plastic bucket for sealed packaging to obtain the degradable spraying agent product.

[0010] In the weighing process, the environmentally friendly and biodegradable natural polysaccharides or natural polymers are one or a compound of 2 - 3 kinds selected from chitosan, starch, cellulose, agar, and alginic acid.

[0011] In the weighing process, the environmentally friendly and biodegradable water-soluble polymer is one or a compound of 2 - 3 kinds selected from polyvinyl alcohol (PVA), polyhydroxyalkanoate (PHA), and polylactic acid (PLA).

[0012] In the weighing process, the environmentally friendly and biodegradable film-forming adjuvant is one or a compound of 2 - 3 kinds selected from ethylene glycol, propylene glycol, alcohol ester 12, tert-butyl hydroquinone, ethylene glycol monobutyl ether, and propylene glycol monomethyl ether.

[0013] In the weighing process, the environmentally friendly and biodegradable wetting agent is one or a compound of 2 - 3 kinds selected from HY-6170, Dynol604, Dynol960, and sodium dodecyl sulfate.

[0014] The bactericide in the weighing process is one of commercial or self-made Bordeaux mixture or lime sulfur mixture, and the mass of its active ingredient in the product is 0.05% - 0.10% (calculated based on 100% of the active ingredient).

[0015] The product prepared according to the invention process is a biodegradable spraying agent for enhancing the disease resistance of Hongyang kiwifruit plants, which can be directly used for smearing or spraying protection on the branches, wounds or pruning cuts; it can also be diluted with water at a ratio of 1:0.5 - 1.5 and used for spraying protection on the leaves, branches and soil.

[0016] The invention product is respectively added with lime sulfur mixture or Bordeaux mixture, and the corresponding products are represented by A and B respectively. There are slight differences in their performance in terms of the disease resistance of Hongyang kiwifruit, specifically in:

[0017] The protection efficiencies of product A against canker disease and root rot of planted Hongyang kiwifruit plants are 97.6% - 98.5% and 96.0% - 97.8% respectively;

[0018] The protection efficiencies of product B against canker disease and root rot of planted Hongyang kiwifruit plants are 97.8% - 98.2% and 95.2% - 97.0% respectively.

[0019] The protection efficiency is calculated based on the number of diseased plants in the test control and the number of diseased plants in the treatment. The formula is:

[0020] Protection efficiency (%) = (Number of diseased plants in the control - Number of diseased plants in the treatment) / Number of diseased plants in the control × 100%

[0021] The characteristics of the invention product are.

[0022] One is environmental friendliness and biodegradability. The degradation period of non-aqueous substances in the product except lime sulfur mixture or Bordeaux mixture is 40 days - 80 days;

[0023] Second, it enhances the effect of Bordeaux mixture or lime sulfur and greatly reduces its dosage, with the usage amount reduced by 50% - 75% compared to the traditional single Bordeaux mixture or lime sulfur;

[0024] Third, it does not rely on the rain - proof greenhouse that is currently effective in preventing and controlling the canker disease of Hongyang kiwifruit;

[0025] Fourth, there is no occurrence of phytotoxicity caused by the use of Bordeaux mixture or lime sulfur.

Claims

1. A degradable spraying agent process for enhancing the disease resistance of Hongyang kiwifruit plants, characterized by: Environmentally friendly and degradable natural polysaccharides or natural polymers, water-soluble polymers, film-forming aids, wetting agents, bactericides and deionized pure water are used as raw materials, and the preparation is carried out through weighing, modulation, grinding, compounding and sealed packaging. The method is as follows: 1) Weighing: Weigh the natural polysaccharide or natural polymer, water-soluble polymer, film-forming aid, wetting agent and fungicide raw materials respectively, and control the mass of raw materials excluding fungicides in the product to be 15%-45%; 2) Preparation: Evenly mix the natural polysaccharide or natural polymer weighed in 1) with the water-soluble polymer substance, and then stir and dissolve them with deionized pure water. The result is called slurry; 3) Grinding: Use a sand mill or a three-roll mill to process the slurry in 2) to make it finer than 100 mesh, and the obtained product is called base material; 4) Compounding: Fully mix the film-forming aid, wetting agent, fungicide weighed in 1) with the base material in 3) to obtain a spray coating; 5) Sealed packaging: quantitatively load the spray material in 4) into a clean and dry plastic barrel and seal it. The result is a biodegradable spray product.

2. The environmentally friendly and degradable natural polysaccharide or natural polymer in claim 1 is a compound of one or two to three of chitosan, starch, cellulose, agar and alginic acid.

3. The environmentally friendly, degradable, water-soluble high molecular polymer in claim 1 is one or a mixture of two to three of polyvinyl alcohol (PVA), polyhydroxyalkanoate (PHA), and polylactic acid (PLA).

4. The film-forming aid in claim 1 is one or a mixture of two to three of ethylene glycol, propylene glycol, alcohol ester 12, tert-butyl hydroquinone, ethylene glycol butyl ether, and propylene glycol methyl ether.

5. The wetting agent in claim 1 is one or a combination of 2-3 of HY-6170, Dynol 604, Dynol 960 and sodium lauryl sulfate.

6. The fungicide in claim 1 is one of commercial or homemade Bordeaux mixture or lime sulfur, and the mass of its active ingredient in the product is 0.05%-0.10% (based on 100% of the active ingredient).

7. The product prepared according to the process of claim 1 is a degradable spray that enhances the disease resistance of Hongyang kiwifruit plants, which can be directly used for smearing or spraying on branches, wounds or cuts for protection; the product can also be diluted with water at a ratio of 1:0.5-1.5 for spraying on leaves, branches and soil for protection.

8. The product prepared by the process of claim 1 is used to protect Hongyang kiwifruit plants from canker and root rot, with protection efficiencies of 97.6% and 95.2%, respectively.

9. The product prepared by the process of claim 1 has the following characteristics: first, it is environmentally friendly and degradable, with a degradation period of 40 to 80 days; second, the effect of Bordeaux mixture or lime sulfur is enhanced and its usage is greatly reduced, which is 50% to 75% less than the traditional single Bordeaux mixture or lime sulfur mixture; third, it does not rely on the rain shelter that is currently effective in preventing and controlling Hongyang kiwifruit canker disease; fourth, there is no phytotoxicity caused by the use of Bordeaux mixture or lime sulfur mixture.