Bacteriacide composition for preventing main diseases of rice
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A composition and rice sheath blight technology, applied in the direction of fungicides, biocides, biocides, etc., can solve the problems of Jinggangmycin's reduced control effect
Active Publication Date: 2012-12-05
CHINA AGRI UNIV
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Problems solved by technology
However, due to the increase in the amount of pesticides used in the field, it has been reported in recent years that the control effect of Jinggangmycin has decreased, and resistant strains have emerged.
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Embodiment 1
[0019] Embodiment 1, the composition of different proportioning is to the virulence determination of rice sheath blight pathogenic bacteria
[0020] Two strains of rice sheath blight (Rhizoctonia solani) were collected from Jilin and Fujian respectively. Strain number: JHT158-3, FBS-3.
[0021] E medium: K 2 HPO 4 2g, KH 2 PO 4 2g, 14g agar powder, 10g glucose, 1000ml deionized water. Autoclave at 115°C for 15 minutes.
[0022] 1. The experimental steps are as follows:
[0023] 1) Mix Thiofuramide and Jinggangmycin with dimethyl sulfoxide to prepare 10 5 μg / ml stock solution, dilute thiofluxamide step by step to 1000μg / mL, 500μg / mL, 200μg / mL, 100μg / mL, 50μg / mL, 20μg / mL, dilute Jinggangmycin to 4×10 4 μg / mL, 1.6×10 4 μg / mL, 8×10 3 μg / mL, 4×10 3 μg / mL, 10 3 Concentration gradients of μg / mL and 500 μg / mL. Design 12 proportioning ratios of Thiofuramide and Jinggangmycin, respectively 1:5, 1:4, 1:3, 1:2, 1:1, 2:1, 2:3, 2:5, 3: 1, 3:2, 4:1, 5:1, each ratio has 6 conc...
Embodiment 2
[0049] Embodiment 2, field efficacy test of fungicide composition to rice sheath blight
[0050] Select the compound ratio with synergistic effect to construct the fungicide composition 16% thia.jing.mime suspension. According to the requirements of the "Pesticide Field Efficacy Test Guidelines" of the Pesticide Control Institute of the Ministry of Agriculture, field efficacy tests were carried out in Heilongjiang and Fujian provinces in my country. Design 3 different application concentrations of 16% thiium·jing·mimic acid suspension, 5 control agents and clear water control, a total of 9 treatments, each treatment was repeated 4 times, each plot was randomly arranged, and measured 15 days and 30 days after application The control effect of pesticides on major rice diseases and the safety of crops.
[0051] 3.1 Drugs to be tested
[0052] 3.1.1 Test drug
[0053] 16% thia.jing.mizu suspension concentrate: its detailed preparation method is as follows:
[0054] Using wet g...
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Abstract
The invention discloses a composition for preventing main diseases of rice. The composition is composed of thifluzamide, validamycin and prochloraz, and a mass ratio of the thifluzamide, the validamycin and the prochloraz is 1:5:2 or 1:5:5. The thifluzamide and the validamycin are mixed according to a proportion of 1:5 to serve as a bacteriacide composition, ternary compounding is carried out on the bacteriacide composition and the prochloraz according to different proportions, and results prove that bacteriostatic effects are best when the the thifluzamide, the validamycin and the prochloraz are compounded according to a proportion of 1:5:2. On the basis, the bacteriacide composition, namely a 16% thifluzamide-validamycin-prochloraz suspending agent is prepared to be used for preventing the main diseases of the rice, wherein a content of the thifluzamide is 2%, a content of the validamycin si 10%, and a content of the prochloraz is 4%. The bacteriacide composition can effectively prevent the main diseases of the rice such as rice sheath blight diseases, rice blasts and false smuts. A plurality of main diseases of the rice can be concurrently cured through one drug application simultaneously, and the bacteriacide composition is favorable for delaying of resistance to drugs, reduces drug application cost, is simple in operation, saves labor and drugs, and has good application prospects.
Description
technical field [0001] The invention relates to a fungicide composition for preventing and treating main rice diseases (mainly preventing rice sheath blight and rice blast, and also preventing rice smut and rice bakanae disease). Background technique [0002] Rice is one of the main food crops in my country, and rice disease has always been the core problem related to rice production. Rice sheath blight is a common disease on rice. The pathogen (Thanatephorus cucumeris (Trank) Donk) is a soil-inhabiting fungus that exists in the form of hyphae and sclerotia. The damage is the heaviest from the peak to the ear stage, mainly against the leaf sheaths and leaves. According to reports, rice sheath blight damages an area of more than 200 million mu every year, resulting in a 10% to 30% reduction in rice production, and up to 50% in severe cases (Meng Qingzhong, 2001). Rice disease ranks first among the three major diseases of rice in my country, seriously hindering the stable a...
Claims
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