Bactericidal composition for preventing and controlling rice kernel smut disease of hybrid rice seed production field, and application thereof

A technology for rice smut and hybrid rice is applied in the field of fungicide preparation, which can solve the problems of stagnation of research and development of new compound drugs, and achieve the effects of avoiding the decline of germination rate, environmental protection production process and ensuring seed quality.

Active Publication Date: 2021-10-08
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned rice smut control agent in the hybrid rice seed production field, Keheijing, has been discontinued. At present, Aimiao is the most widely used one, which mainly controls rice sheath blight, and can also play a certain role in the control of rice smut. However, it has been used for many years, and the resistance of Ustilago oryzae to it has been enhanced and the impact on the quality of seeds after storage has not been reported.
Development of new compound agents against rice smut stalled

Method used

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  • Bactericidal composition for preventing and controlling rice kernel smut disease of hybrid rice seed production field, and application thereof
  • Bactericidal composition for preventing and controlling rice kernel smut disease of hybrid rice seed production field, and application thereof
  • Bactericidal composition for preventing and controlling rice kernel smut disease of hybrid rice seed production field, and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1. Test material: 'Huazheyou 261'; the female parent is "Huazhe 2A", and the male parent is "16T".

[0024] 2. Drugs to be tested: 80% mancozeb WP, 5% allicin microemulsion, Aimiao (30% difenoconazole·propiconazole) emulsifiable oil.

[0025] 3. Test method

[0026] The experiment was carried out in 2020 in the hybrid rice production field of Wuwangnong Seed Industry Co., Ltd., Suichang County, Zhejiang Province, and the sowing was carried out in stages according to the growth period characteristics of the parents. When transplanting, the ratio of parents to parents is 2:8, and the distance between parents is 25cm; the male parents are in double rows, the row spacing is 24cm, and the plant spacing is 24cm. This is suitable for dense planting, the planting density is 15cm (spacing between plants) × 22.5cm (row spacing), and 5 grain seedlings are inserted in each stalk. After heading, spray gibberellin in stages to ensure that the parents meet at the flowering stage.

...

Embodiment 2

[0042] In Example 1, it was confirmed that the bactericidal composition can significantly reduce the diseased grain rate of rice smut in the hybrid rice seed production field, and the control effect is significantly better than the current field production commonly used medicament CK-3 (Ai Miao) and does not affect the germination ability of the seeds , In this embodiment, the application effect of the fungicide composition and the impact on seed quality are further verified.

[0043] 1. Test material: 'Zhongzheyou 8'; the female parent is "Zhongzhe A", and the male parent is "T-8".

[0044] 2. Drug for testing: the same as in Example 1.

[0045] 3. Test method

[0046] The experiment was carried out in Suichang County, Zhejiang Province, in 2020 in the hybrid rice production field of Wuwangnong Seed Industry Co., Ltd. The planting method of the parents, the design of the experiment, the area of ​​the plot, the chemical treatment and control used, and the amount of spraying w...

Embodiment 3

[0056] It has been confirmed in Examples 1 and 2 that the bactericidal composition can significantly reduce the rate of diseased grains of rice grain smut in the hybrid rice seed production field, and the control effect is significantly better than Aimiao (CK-3) and does not affect the germination ability of seeds. This implementation In this case, under the special conditions that the parents and parents met at the flowering stage were poor, which was conducive to the occurrence of rice smut, the application effect of the fungicide composition and the impact on seed quality were further verified.

[0057] 1. Test material: 'Qianyou 0508'; the female parent is "Qianjiang No. 1 A", and the male parent is "Zhehui 0508".

[0058] 2. Drug for testing: the same as in Example 1.

[0059] 3. Test method

[0060] The test was carried out at the Zijingang Sub-station of the Agricultural Experiment Station of Zhejiang University in 2020. The parent planting method, test design, plot ar...

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Abstract

The invention discloses a bactericidal composition for preventing and controlling rice grain smut disease of a hybrid rice seed production field. The bactericidal composition takes water as a solvent and contains 100-5000 mg.L<-1> of mancozeb and 5-100 mg.L<-1> of allicin. The bactericidal composition for preventing and controlling the rice kernel smut disease of the hybrid rice seed production field, provided by the invention, contains a protective bactericide mancozeb and a biological extract allicin, can effectively prevent and treat the rice kernel smut disease, can effectively avoid the decrease of thousand seed weight and germination rate of seeds, and ensures the quality of the harvested seeds.

Description

technical field [0001] The invention relates to the technical field of fungicide preparation, in particular to a fungicidal composition for preventing and treating rice smut in hybrid rice seed production fields and its application. Background technique [0002] Rice Kernel Smut (RKS) is caused by the soil-borne fungus-Basidiomycete Tilletia horrida. It is the most destructive disease to male sterile lines in hybrid rice production areas in the world. High temperature, high humidity and rainy weather , is the suitable weather for the germination of rice smut pathogen. The site and period of infection of the pathogenic fungus of rice smut are relatively concentrated, mainly in the earing and flowering stage of the sterile line in the seed production field, and invade from the stigma of the sterile line to cause disease, so the flowering stage is scattered and the angle of flowering Larger sterile lines with higher stigma exposure rate are more conducive to the infection of p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N47/14A01N41/02A01P3/00A01G13/00
CPCA01N47/14A01N41/02A01G13/00
Inventor 胡伟民刘家丰剧佳华关亚静胡晋丁焓赟宋博文宋文坚
Owner ZHEJIANG UNIV
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