Chitosan oligosaccharide composition for resisting rice black streaked dwarf as well as purpose and method thereof
A technology of rice black streak dwarfing and composition, which is applied in the field of agricultural chemistry, can solve the problems of different control effects of rice sheath blight, different degrees of induced disease resistance, and the reduction of rice plant incidence and disease index, achieving improved effect of effect
Active Publication Date: 2013-11-20
HAINAN ZHENGYE ZHONGNONG HIGH TECH
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Problems solved by technology
However, at the adult plant stage of rice, spraying different concentrations of chitosan oligosaccharide solutions on the rice leaves, the incidence and disease index of rice plants were significantly lower than those of the control, and the relative control effects were all above 50%, and different concentrations of chitosan oligosaccharides The degree of resistance to rice sheath blight induced by solution is different, and the control effect on rice sheath blight is also different
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Embodiment 1
[0027] The 5wt% chitosan oligosaccharide solution is diluted with water to the corresponding application concentration respectively, and the concentration is calculated according to the weight percent concentration, and is calculated in ppm (parts per million) concentration in the result record, and 50ppm represents the weight percent in the result record below The concentration is 0.005%. Water treatment was used as a control. Treating the rice seeds and rice plants with the diluted solution in stages according to requirements, the seed treatment is soaking the seeds, and the soaking time is 24 hours. The treatment mode of other stages is spraying treatment of chitosan oligosaccharide aqueous solution, and the interval time of spraying treatment is 15 days. Each treatment is observed and detected through 3 test fields (667 square meters). The samples of the treated seeds are counted when the crops grow into 4 leaves after germination. The statistics of the treatments at each...
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The invention relates to a chitosan oligosaccharide composition for resisting rice black streaked dwarf as well as a purpose and a method thereof, in particular to a pesticide composition for resisting the rice black streaked dwarf. The pesticide composition comprises chitosan oligosaccharide, and the chitosan oligosaccharide accounts for 0.0048 percent to 0.02 weight percent of the pesticide composition. The invention also provides the purpose of the chitosan oligosaccharide composition for preventing and treating the rice black streaked dwarf, which is characterized in that the weight percentage of the chitosan oligosaccharide in the chitosan oligosaccharide composition is 0.0048 percent to 0.02 percent. The composition solves the important problem of the rice black streaked dwarf resistance, particularly, after the pesticide composition comprising the chitosan oligosaccharide is used for treating the rice seed and plants, the rice black streaked dwarf resistance is realized, the phytotoxicity on the crops can not be generated, and no pesticide residue is left.
Description
technical field [0001] The invention belongs to the field of agricultural chemistry, and in particular relates to a control composition and a control method for rice black-streaked dwarf disease, in particular to a chitosan oligosaccharide composition for resisting rice black-streaked dwarf disease and its use and method. Background technique [0002] Rice black-streaked dwarf virus belongs to the genus Fijivirus of the family Reoviridae. The disease is a newly discovered rice virus disease transmitted by white-backed planthopper and striatellus in recent years in my country. The disease has the characteristics of wide range, strong sudden and explosive, fast spread and hidden damage. If the rice is infected at the seedling stage and the early tillering stage, the rice will not be heading normally, and the harvest will be basically lost; if the disease is infected at the jointing and booting stages, the yield will be lost by 30% to 50%, especially in late rice, which poses a...
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IPC IPC(8): A01N43/16A01P1/00A01G13/00
Inventor 张善学陆红霞张余胜陈丁丁肖斌杜丽芬徐俊光
Owner HAINAN ZHENGYE ZHONGNONG HIGH TECH