A kind of bactericidal composition containing prothioconazole and its application
A technology of prothioconazole and a composition is applied in the field of bactericidal compositions containing prothioconazole, which can solve the problems such as easy generation of resistance of bacteria and decrease in drug efficacy, and achieves reduction in the amount of pesticides used, high control efficiency, and durability. long-lasting effect
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[0023] In the present invention, the bactericidal composition includes lentinan, and the lentinan in the present invention is preferably derived from the fruiting bodies of Lentinus edodes. The preparation method of lentinan described in the present invention preferably comprises the following steps: 1) After the fruit body of Lentinus edodes is crushed, add water and homogenize to obtain a homogeneous liquid; 2) Mix the homogeneous liquid with water and boil for 40-80 minutes, then filter collecting the supernatant; 3) concentrating the supernatant, and precipitating the protein in the concentrated solution with chloroform-n-butanol to collect the polysaccharide solution; 4) precipitating the polysaccharide solution with ethanol to obtain lentinan.
[0024] In the present invention, the mushroom fruiting body is preferably dried before crushing, and the drying in the present invention is preferably carried out in a vacuum drying oven, and the dried mushroom fruiting body has a...
Embodiment 1
[0038] Toxicity determination of prothioconazole complex against rice sheath blight
[0039] Among them, the rice sheath blight pathogen was collected from the field and purified and cultured indoors. The test method was referred to "The Agricultural Industry Standard of the People's Republic of China NY. / T 1156.2-2006"
[0040] Table 1 shows the results of the indoor toxicity test of the composition containing prothioconazole and lentinan against rice sheath blight.
[0041] Table 1 Indoor toxicity test table of prothioconazole and lentinan compound against rice sheath blight
[0042]
[0043] As can be seen from Table 1, the EC of prothioconazole and lentinan on rice sheath blight 50 3.68mg / L and 15.82mg / L respectively, when the mass ratio of prothioconazole and lentinan is 15:1-1:15, the co-toxicity coefficient is greater than 120, showing a synergistic effect, when prothioconazole and When the mass ratio of lentinan is 1:2, the co-toxicity coefficient is the largest a...
Embodiment 2
[0045] Prothioconazole and lentinan were compounded at a weight ratio of 1:4 to conduct a field test on the control of rice sheath blight. The method of application was spraying, focusing on the base of the stem, and the amount per mu was formulated as 60 kg per acre according to the following table. The drug was applied for the first time at the peak tillering stage of rice, and the second application was applied 7 days later. A total of two applications were applied. The disease index was measured 7 days, 14 days, and 30 days after application, and the drug efficacy was calculated. The results are shown in Table 2.
[0046] Table 2 Comparison of the effects of pesticides for controlling rice sheath blight
[0047]
[0048]
[0049] (The data comes from the field efficacy test in 2017)
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