Bactericide composition for preventing and treating pear black spots and preparation method thereof

Abstract

The invention provides a bactericide composition for preventing and treating pear black spots and belongs to the technical field of pesticides. The bactericide composition for preventing and treating the pear black spots is prepared from, by weight, 10-30 parts of radix angelicae pubescentis, 10-30 parts of fructus cnidii, 10-30 parts of sophora alopecuroide, 10-30 parts of broom flowers, 5-20 parts of herba asari sieboldii, 5-20 parts of lesser bougainvillea flowers, 5-20 parts of calculus bovis, 5-15 parts of the fruit of Chinese magnoliavine, 3-12 parts of cacumen biotae, 3-12 parts of apocynum venetum, 3-12 parts of solidago virgaurea, 1-10 parts of saururus chinensis and 1-5 parts of biological fungicide, and the biological fungicide is prepared from, by mass, 50%-70% of bacillus subtilis and 30%-50% of beauveria bassiana. The bactericide composition can efficiently prevent and treat the pear black spots, the preventing and treating effect can reach 97% or above, the pesticide effect is stable, and duration time is long; the stress resistance of pear trees can be improved, and the bactericide composition also has a good preventing and treating effect on pear scab, the pear rust disease, pear phylloxera and the like.

Description

technical field [0001] The invention belongs to the technical field of pesticides, and in particular relates to a fungicidal composition for preventing and treating pear black spot and a preparation method thereof. Background technique [0002] Pear belongs to Rosaceae (Rosaceae) Pear subfamily (Maloideae) Pyrus (Pyrus) plant, is an arbor deciduous fruit tree. my country is one of the origins of pears and has abundant pear germplasm resources. Many varieties such as Yali, Lili, etc. are famous at home and abroad for their high quality. Pear black spot (Pearblackspot), also known as fruit cracking disease, is caused by Alternariakikuchiana Tanaka and is one of the important diseases of pear trees. The disease mainly infects fruits, causing cracking and early fruit drop, which directly affects the yield and quality of pome fruit; it also infects leaves and new shoots, weakens the tree vigor, and can cause early leaf fall and young shoots to die in severe cases. Pear black s...

AI Technical Summary

Problems solved by technology

However, at present, the development of botanical pesticides is still slower than that of chemical pesticides. There are many limiting factors in the use of pesticides, including the low activity of some botanical pesticides, large dosage, weak knockdown power, and slow efficacy, which is not conducive to sudden outbreaks. The prevention and control of epidemic diseases and insect pests; the type and content of its active ingredients are affected by its own genetic factors and external environmental conditions such as soil, temperature, light, and soil value, and there will be regional and seasonal changes; and the active ingredients in plants The content of different parts is also different, especially some active ingredients are unstable to light and heat, etc.

However, the research and development of new strains to the expansion of applications requires a lot of investment, and it is difficult to promote. Because they are newly discovered microorganisms, it is difficult to accurately predict the adaptability and potential impact on the environment.

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