Compound bactericide capable of preventing and treating wheat takeail

Abstract

The invention discloses a compound fungicide for controlling wheat take-all and a using method thereof. Active constituents of the compound fungicide consist of myclobutanil and tebuconazole, wherein the mass ratio of the myclobutanil to the tebuconazole is (5-10): (2-3), the preferred mass ratio is 6: (2-3), and the optimum mass ratio is 6: 2 or 6: 3. The compound fungicide compounds the myclobutanil with the tebuconazole, ensures that the effect of strong seedling dwarfing of the tebuconazole on seedlings and the effect of seedling growth promotion of the myclobutanil are combined, overcomes the disadvantage that the single use of the tebuconazole is easy to cause the hazard, avoids the condition that the seedling treatment of the myclobutanil is easy to cause the vain growth of the seedlings, ensures safe seedling emergence and robust seedlings after the seedling treatment, has good control effect on the wheat take-all, and has the control effect superior to single fungicides.

Description

technical field [0001] The invention relates to a compound fungicide for preventing and treating wheat take-all. Background technique [0002] Wheat take-all (Gaeumammomyces graminis (Sacc.) Arx & oliver var. tritici Walker) is an important root disease of wheat. In my country, it has expanded to the northern winter wheat area, the northwest spring wheat area and the middle and lower reaches of the Yangtze River wheat area in 18 provinces (regions), and the occurrence area and the degree of damage are increasing. Take-all disease mainly harms the root system of wheat and is one of the devastating diseases of wheat. According to statistics, the field with mild disease will reduce the yield by 10% to 30%, and the serious one will reduce the yield by more than 50%, or even stop production. At present, there is no wheat variety resistant to take-all in my country. Although cultivation measures such as crop rotation and stubble inversion have certain effects on the control of t...

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Problems solved by technology

[0005] Studies have shown that myclobutanil is easy to systemically transmit to the whole plant of wheat seedlings. In addition to having a certain control effect on soil-borne diseases, it also has good control effects on aboveground diseases such as powdery mildew, and has a certain effect on promoting seedling production. Use Improper dosage can easily cause tall and slender wheat seedlings (Acta Pesticide Science. 2008, 10(1): 23-27; Efthimiadis, P.1988. Myclobutanil seed treatment--a new approach to control cereal diseases. Proceedings of the British Crop Protection Conference-Pests and Diseases.British Crop Protection Council.: p.887-893); Tebuconazole and other first-generation triazole fungicides have the effect of dwarfing and strengthening seedlings. Wheat seedlings are mainly enriched at the junction of rhizomes (Master's Thesis of China Agricultural University, 2002, Gao Renjun), so it has good control effect on soil-borne diseases such as sheath blight and take-all, but the dosage is slightly higher. It is easy to cause phytotoxicity of seedlings that are difficult to unearth

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