Seed coating agent for preventing and treating wheat rot disease

Abstract

A seed coating agent for preventing and treating a wheat rot disease is provided. The seed coating agent includes a fungicide and a seed priming and elicitor. The fungicide includes silthiopham and coumoxystrobin. The seed priming and elicitor includes salicylic acid and compound sodium nitrophenolate. The weight percentage of each components is 1%-60% of the fungicide, 0.0005%-0.05% of salicylic acid, and 0.001%-0.1% of compound sodium nitrophenolate. The seed coating agent has a good effect of promoting seed germination and strengthening seedlings on wheat seeds. Both silthiopham and coumoxystrobin are of low toxicity, and are safe for humans, animals, beneficial organisms, and the environment. It can delay the pathogens resistance to a single agent

Claims

1. A seed coating agent for preventing and controlling wheat rot disease, comprising a fungicide and a seed priming and elicitor; wherein the fungicide comprises silthiopham and coumoxystrobin, and the seed priming and elicitor comprises salicylic acid and compound sodium nitrophenolate.

2. The seed coating agent of claim 1, wherein a mass percentage of each components is 1%-60% of the fungicide, 0.0005%-0.05% of the salicylic acid, and 0.001%-0.1% of compound sodium nitrophenolate.

3. The seed coating agent of claim 1, wherein a mass ratio of silthiopham and coumoxystrobin is 5:1˜1:10.

4. The seed coating agent of claim 1, further comprising auxiliary materials; wherein the auxiliary materials comprise one or more of a dispersant agent, an antifreeze agent, a film forming agent, a thickener, or a warning coloration.

5. The seed coating agent of claim 4, wherein the seed coating agent is microcapsule suspension or suspension.

Description

DETAILED DESCRIPTION OF EMBODIMENTS

(1) The present disclosure will be further described below in conjunction with embodiments, but the essence of the present disclosure is not limited to the following embodiments.

Embodiment 1

(2) Preparation of 18% silthiopham⋅coumoxystrobin suspension seed coating agent, by mass percentage.

(3) silthiopham: 15%, coumoxystrobin: 3%, plant regulator composition: 0.06% (compound sodium nitrophenolate 0.05%, salicylic acid 0.01%), sodium dodecyl sulfate: 8%, naphthalene sulfonated formaldehyde condensates: 4%, NNO: 2%, ethylene glycol: 5%, magnesium aluminum silicate: 3%, bentonite: 1%, Erit anhydrous fast T: 2%, film former: 5%, dye: 5%, water balance.

(4) Preparation method: According to the formula, weighing the above components (except for film-forming agents and dyes) in proportion, adding them to the ball mill for 60 minutes, filtering, pumping into the dispersion tank for high-speed shearing for 3 minutes, and then fully grinding with a sand mill to control the solid components with particle diameters within 1 μm. After grinding, stirring evenly, and adding film-forming agent and dye to obtain suspension seed coating product.

Embodiment 2

(5) Preparation of 20% silthiopham⋅coumoxystrobin microcapsule suspension seed coating agent, according to weight percentage.

(6) silthiopham: 10%, coumoxystrobin: 10%, plant regulator composition: 0.06% (compound sodium nitrophenolate 0.05%, salicylic acid 0.01%), methyl oleate: 6%, cyclohexanone: 4%%, diphenylmethane diisocyanate: 6%, fatty amide N-methyl taurate: 3%, ethylenediamine: 1.5%, 1,3-propanediol: 2.5%, dispersant NNO: 4%, magnesium aluminum silicate: 4%, reducing glue: 2%, polyvinyl alcohol: 2%, polyacrylate: 2.5%, permanent red: 3%, water balance.

(7) Preparation method: dissolving the proportions of silthiopham, coumoxystrobin and plant regulator in a solvent, adding diphenylmethane diisocyanate and stirring to obtain the oil phase; adding emulsifiers and auxiliary agents to the water and stirring to obtain water phase; adding the water phase into the oil phase and homogenizing at a high speed to form an oil-in-water emulsion; at 450 rpm, adding ethylenediamine to participate in the interfacial polymerization reaction, increasing the reaction temperature to 55° C., and keeping for 3 hours to solidify into a capsule; adding dispersant NNO, magnesium aluminum silicate, permanent red, polyvinyl alcohol and polyacrylate, stirring evenly to make microcapsule suspension seed coating agent.

(8) Field control experiment of seed coating agent.

(9) In the experiment, Embodiment 1 (18% siliciclofen⋅coumoxystrobin suspension seed coating agent), Embodiment 2 (20% siliciclofen⋅coumoxystrobin microcapsule suspension seed coating agent), control agent 1 (12.5% Siliclostrobin suspension seed coating agent), and control agent 2 (10% coumoxystrobin suspension seed coating agent) are tested. The suspension seed coating agent is used for seed coating treatment, the coated wheat seeds are naturally dried in the shade and then sown for sowing. 40 days after sowing, the seedling emergence rate, seedling height, root length, fresh weight and control effect are investigated, and the control effect is investigated 90 days after sowing.

(10) TABLE-US-00003 TABLE 3 Effects of different seed coating formulations on the growth of wheat and the prevention and control of wheat rot disease Control 40 days after sowing effect 90 Agent Fresh days (g): Plant Root effect Control after Treatment seed Emergence height length weight after sowing agent (g) rate (%) (cm) (cm) (g) (%) (%) Embodiment 1 1:100 90.8 12.8 ± 1.7 5.3 ± 1.8 1.41 ± 0.21 95.8 88.7 Embodiment 2 1:100 88.7 12.5 ± 1.5 4.8 ± 2.4 1.49 ± 0.23 96.9 89.7 12.5 % Siliclostrobin 1:50 78.6 9.2 ± 1.3 3.6 ± 2.1 1.09 ± 0.17 84.8 76.3 suspension seed coating agent 10% coumoxystrobin 1:50 81.4 10.4 ± 1.6 4.1 ± 2 1.16 ± 0.21 70.5 58.4 suspension seed coating agent Blank control Water 79.8 10.8 ± 1.9 3.4 ± 1.9 1.13 ± 0.16 — —

(11) The field test results show that the suspension seed coating agent formed by the compound of silthiopham, coumoxystrobin and plant regulators significantly improves the emergence rate, plant height, root length and fresh weight of wheat. The overall prevention and control effect of wheat rot disease is obvious. According to field investigations, within the test dose range, the crops grew normally, and no phytotoxicity or abnormal phenomena were seen on the plants, which is safe for wheat.

(12) Described above are merely illustrative of the disclosure to enable those skilled in the art to implement or use the disclosure, and are not intended to limit the invention. It should be understood that any modifications, replacements or changes made by those skilled in the art without departing from the spirit of the disclosure should fall within the scope of the disclosure.