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Bactericide for preventing and curing wheat scab

A technology of wheat head blight and fungicide, applied in the field of plant protection, can solve the problem of poor efficacy of a single dose of drug resistance, and achieve the effects of safe use, good control effect, and delay of drug resistance

Inactive Publication Date: 2010-09-22
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a fungicide for preventing and treating wheat head blight, which solves the problem that pathogens are prone to produce resistance to existing fungicides or the efficacy of a single dose of existing fungicides is not strong

Method used

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  • Bactericide for preventing and curing wheat scab
  • Bactericide for preventing and curing wheat scab
  • Bactericide for preventing and curing wheat scab

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 3

[0013] Embodiment 1 triadimefon tebuconazole compound agent and the plate efficacy test in the prevention and treatment of wheat scab

[0014] Triadimefon and tebuconazole were dissolved in acetone respectively, and then triadimefon and tebuconazole were mixed into the culture substrate according to different weight concentration ratios, and the inhibitory activity on the growth of wheat head blight was determined. The test strains used were carbendazim-resistant strain GJ33, tebuconazole-resistant strain DY3-4 and sensitive strain ZJ2-9. These different types of strains can represent several main groups of wheat scab in the field at present. Determination of the inhibitory rate of the agent on the growth of these bacterial strains, using the software DPS to calculate the inhibitory concentration EC 50 value, this experiment was repeated three times. (The results are shown in Table 1).

[0015] In this test, a single dose of triadimefon was used as the standard drug, and th...

Embodiment 2 3

[0033] Example 2 Triadimefon tebuconazole compound and its in vitro drug efficacy test in the prevention and treatment of wheat scab

[0034] The test material is wheat ears at flowering stage (Zimai 12), and a control group and a treatment group are set up, with 30 wheat ears in each group. The control group was moisturized with clear water, and the drug treatment group included the recommended field dosage of triadimefon or tebuconazole single agent, and a compound agent of 1:1 weight percentage, and 30 wheat ears in each treatment group were soaked in the above drug for 15 seconds , quickly take it out and dry it in the shade. 1.0×10 5 10 microliters of the wheat gibberella spore suspension were injected into the glumes in the middle part of the ear, bagged and moisturized with clear water, and cultivated at 25°C for 5 days to count the incidence rate, the incidence rate (%)=(the number of glumes / total number of glumes of the disease)× 100%. Control effect (%)=(morbidity...

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Abstract

The invention discloses a bactericide for preventing and curing wheat scab, which comprises triazolone and tebuconazole as active components. The bactericide of the invention has stable chemical properties; in the mixing process, triazolone and tebuconazole are mutually soluble and do not generate chemical reaction; the bactericide has wide range of application, obvious synergy and safe use; and the bactericide has good antibacterial activity to gibberellic groups of wheat of different types in the field at present, and the antibacterial activity of the bactericide is obviously higher than the antibacterial activity of a single triazolone agent or a single tebuconazole agent, i.e. the bactericide has compound synergy of the triazolone agent and the tebuconazole agent. The compound agent also has good effect on preventing other important diseases such as wheat powdery mildew and the like in wheat production, has broad-spectrum sterilizing effect, can delay generation of drug resistance of pathogenic bacteria to single agents in the formula, and has significance for resistance management.

Description

technical field [0001] The invention relates to the field of plant protection, in particular to a fungicide for preventing and treating wheat scab. Background technique [0002] Scab is an important disease of wheat crops, especially wheat suffers the most. The pathogen is Gibberella zeae (Schw.) Petch in sexual form and Fusarium graminearum SchW in anamorphic form. It is mainly distributed in winter wheat areas in the middle and lower reaches of the Yangtze River and spring wheat areas in Northeast China, and also often occurs in the upper reaches of the Yangtze River and winter wheat areas in South China. After the disease occurs, the yield is generally reduced by 10-20%, and when it is severe, it reaches 80-90%. In addition, diseased wheat grains contain deoxynivalenol, zearalenone and other toxins that are harmful to humans and animals, which seriously endanger food safety and pose a serious potential threat to the food manufacturing industry. [0003] At present, due ...

Claims

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Application Information

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IPC IPC(8): A01N43/653A01P3/00
Inventor 马忠华刘馨蒋金花
Owner ZHEJIANG UNIV
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