How to prevent and cure pear tree pests and pears?
When the pear trees are planted, the most troublesome thing is the pests and diseases. Next, Xiaobian brings everyone to come and know the pear tree and pear. In order to facilitate the management of pear trees in the back.
Pear carp is a kind of pest of pear tree. It is more serious in the main producing area of ​​pear. It is mainly used to suck buds, leaves and twig sap, and then secrete mucus, causing bacteria to cause brown spots on the leaves, causing early leaves. Phenomenon occurs, sometimes contaminating the fruit, seriously affecting the quality and yield of the pear, but also affecting the life of the pear tree, causing huge losses to the fruit farmers.
What is the pear raft?
Adults are mainly divided into summer and winter. Summer-type adults are slightly smaller, yellow-green, with no markings on the wings, black eyes, and four yellow or red-yellow stripes on the chest. The winter-type adult has a long body, a yellowish-brown body with dark brown markings.
The incidence of pear hibiscus
Winter-type adults generally overwinter in the gaps of bark, weeds, and Shishui Lake. When early pear blossoms sprout, they begin to lay eggs before germination, and begin to endanger young tissues during germination and leafing. The hazard period is mainly concentrated in June-July, and at the same time, due to the overlapping of generations, the whole year can be harmed. In the rainy season from July to August each year, the glue secreted by pear hibiscus began to cause a large number of bacteria, and when the relative humidity was greater than 65%, mildew began to occur, which led to brown spot disease necrosis and severe defoliation.
Control measures of pear hibiscus
Qingyuan
In the winter, the dead branches, fallen leaves and weeds in the garden are completely removed. At the same time, the old bark is scraped off, the diseased branches are cut off, and the disease is burned or buried to eliminate the overwintering insect source.
2. Chemical control
Chemical control is mainly divided into three periods:
Germination period: The whole tree is sprayed with 5 degree stone sulfur mixture, or 1500-2000 times liquid of pyrethroid agent is sprayed during the flower bud germination period to control the number of adult mites.
Falling flowering period: When the flowering rate is about 95%, spray 10% imidacloprid 4000-6000 times solution, or 5% pyriproxyfen 1500 times solution + 1.8% Ainochrome 2000-4000 times solution + 3.2% Avi The bacterin is 5000-8000 times liquid for prevention and treatment.
15 days after flowering: In this period, 10% imidacloprid 3000 times solution + 3.2% avermectin 3000 times solution was used for spray control.
The above is some understanding of the pear tree pear hibiscus and prevention measures, more pear tree knowledge in the Hui Nong school!
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