There are countermeasures for the second flowering of pear trees
Dried Garlic Flakes,Dehydrated Vegetable,Cabbage Flakes a Grade Greenfarm Import And Export Co., Ltd. , http://www.jn-foods.cn
The phenomenon of secondary flowering in pear trees has a certain degree of universality, and many growers are guilty of this. The flowers that should have been opened in the spring of the following year were opened early in the autumn of that year, and the amount of flowers spent the following year would be reduced or even eliminated. When the second flower is opened, a large number of autumn shoots and autumn leaves will be extracted and the tree nutrients will be consumed. Such a tree will not be fully populated in the second year, and will be more susceptible to diseases. This will not only affect the output of the current year, but also increase management difficulties. And input. The key measure to prevent secondary flowering is to protect the leaves. The specific measures are as follows: 1. Strengthen pest control. Pygnet, Pear, Pearwood, which causes a large number of major insect pests. (1) The critical period for the prevention and control of Pygnet is from late May to early June. During this period of time, it was often checked in the orchard. The first drug was found when there were a few insect pests on the leaves, and then once again after 10-15 days. The first generation of adults emerged in early June and it was difficult to prevent and control completely after successive generations overlapped. The effective medicine is 50% killer pine oil, kung fu, enemy kill, dimethoate and so on. (2) The critical period of prevention and treatment of pear hibiscus. Take a medicine before flowering, and take medicine once after flowering. The effective pharmaceutical agent Awei insect clear, methamidophos and so on. (3) Peach leafhopper. The first peak occurred from May to June, and the second peak from late July to August. Effective agents: carbamide, clotris, triclosan, dicofol. The main diseases causing a large number of fallen leaves are black spot, ringworm, black spot, and rust. The main prevention period is from April to July. Effective pharmaceuticals: Xiansheng, Dasheng m-45, polyoxorubicin, teconazole, rustin, thiophanate-methyl, carbendazim, etc., can be combined with pest control. Prevention and control of pests and diseases, disinfection of clear gardens is the key. During the winter, the weeds and defoliants in the garden were burned to reduce the incidence of diseases and insects. In late February, 5 bumeite lime sulfur + 200-fold sodium pentachlorophenol were sprayed before sprouting. Pay attention to the trunk of the tree and the ground around the trunk. Minimize the source of the disease. 2, do a good job of irrigation and drainage in the pear garden. Dry leaves can cause defoliation. Too much water, lack of air in the soil, the new root of the pear tree suffocates and dies, and it also causes fallen leaves. Therefore, in the pear orchards with heavy soil, pay attention to drainage in rainy seasons, and timely irrigation in case of insufficient moisture to meet the moisture needed for normal growth of pear trees. The fruit trees are planted on the mowing belt to reduce the evaporation of soil moisture. 3, early application of deep basal fertilizer. In particular, adding organic fertilizer can not only increase nutrient consumption of the tree body, but also enhance the body potential, and can also increase soil fertility and water retention capacity. 4, timely removal has been flowering, reduce tree nutrient consumption.