Combined bactericide for preventing and controlling Ustilaginoidea virens

Abstract

The invention discloses a combined bactericide for preventing and controlling Ustilaginoidea virens, and belongs to the field of pesticides. The combined bactericide comprises 15-30 wt% of coumoxystrobin, 10-25 wt% of prochloraz, 5-12 wt% of tricyclazole, 5-35 wt% of assistants, and the balance of a filler. The above bactericides are compounded and complement with each other to achieve synergisticeffects, so compared with single agents, the combined bactericide has the advantages of obvious synergistic effect on the rice Ustilaginoidea virens, remarkable improvement of the prevention and control effect, long lasting period, effectiveness in delaying the pesticide resistance of the rice Ustilaginoidea virens to the single agents, replacement of a part of medium-high toxicity bactericides,reduction of the dosage, reduction of environmental pollution and residues of agricultural products, and reduction of the cost.

Description

technical field [0001] The invention relates to the field of pesticides, in particular to a combined fungicide for preventing and treating rice false smut. Background technique [0002] Rice false smut, also known as green smut, usually occurs on middle and late rice, and is more common on hybrid rice and high-quality rice. The disease mainly damages the ears, and the serious reduction in yield can reach 10%-20%. With the increase of japonica rice planting and nitrogen fertilizer application level, rice false smut has gradually increased from a minor disease to a major disease. Rice false smut not only affects the yield, but its pathogen is a substance that is toxic to humans, livestock, and poultry and a pathogenic pigment C9H607. For such diseases, the application of chemical agents is currently the most effective means. Commonly used drugs are conventional drugs such as thiophanate-methyl, Jinggangmycin, triadimefon, and carbendazim. Since these drugs have been populari...

AI Technical Summary

Problems solved by technology

Commonly used drugs are conventional drugs such as thiophanate-methyl, Jinggangmycin, triadimefon, and carbendazim. Since these drugs have been popularized in a large area since the 1970s, long-term continuous high-dose use of varieties or modes of action A single chemical fungicide is likely to affect problems such as drug residues, environmental pollution, and the development of drug-resistant fungi

According to a 2003 study by Jiangsu Zhenjiang Institute of Agricultural Sciences, it was found that the resistance of rice smut fungus to carbendazim in the coastal areas increased by an average of 2-3 times compared with 1995. Unfavorable factors such as the frequency of application and the reduction of control effect