Control techniques of Diseases and insect pests of Fruit trees in Summer

Control techniques of Diseases and insect pests of Fruit trees in Summer

There are many Rain Water in summer, with high temperature and humidity, all kinds of weeds grow vigorously, and fruit tree diseases and insect pests are prone to epidemic and flooding. In order to effectively control the outbreak of diseases and insect pests of fruit trees in summer and ensure fruit quality and bumper harvest, we should adhere to the principles of prevention, comprehensive control, early treatment and early treatment, and effectively control the occurrence of diseases and insect pests on the basis of good prediction.

The period of prevention and control. The occurrence of diseases and insect pests in ① fruit trees can be divided into three stages: the first stage, the peak stage and the last stage. Should be mastered in the initial stage, before the spread and concealment of drug killing. At this time, the insect has small body, thin body wall, less food, concentrated activity and low drug resistance. The initial control indexes of different pests in ② are different, such as 1% egg rate of peach heart borer, 2 ~ 3 red spiders per leaf, 5% leaf eaters, 5 ~ 6 aphids per leaf or 8 ~ 10 populations per 100 buds. Do a good job in forecasting and control indicators in a timely manner. ③ spray control pay attention to weather changes, do not do four unsuitable, not windy weather spraying; should not spray protective and internal inhalation fungicides before rain; should not spray high temperature time to avoid drug poisoning; should not spray when the dew is not dry, easy to burn leaves.

Prevention and control methods. According to the prediction of ①, 5 ~ 10 sites were randomly selected from different directions in the orchard to investigate the occurrence of diseases and insect pests on leaves, fruits and branches, and put forward the control plan in time according to the control index of diseases and insect pests. ② should strengthen and improve the cultivation and management measures, promote the tree body to be strong, improve the disease resistance, and carry out comprehensive control in time. ③ adopts biological and physical methods to control the diseases and insect pests of fruit trees. Such as removing diseases, insects and rotten fruit; scraping off hidden eggs, pupae, insect bodies, diseased bark and tumor gall bodies on branches; digging out pathogens and pests in roots and underground; cutting off branches and tips of various harmful diseases and insect pests; using black light, frequency insecticidal lamps, sugar and vinegar, sex attractants, trunk binding weeds and other methods to kill heart borer such as pear small, peach small, peach borer and some caterpillar pests such as leaf moth and roll leaf moth. ④ was used rationally. Pyrethroids with high efficiency, low toxicity and low residue pesticides were selected, diluted accurately and applied reasonably in strict accordance with the instructions. The spray should be comprehensive and uniform, and the trunk and the back of the leaves should be fully sprayed. Alternating application of organic pesticides and inorganic pesticides, or mixed application of more than two different pesticides. According to the occurrence of diseases and insect pests, difenoconazole, carbendazim, tebuconazole, avermectin, cypermethrin, imidacloprid, acetamiprid, imidacloprid and other pesticides can be selected according to the occurrence of diseases and insect pests, such as difenoconazole, carbendazim, carbendazim, tebuconazole, avermectin, imidacloprid, acetamiprid, imidacloprid and so on. When the occurrence of ⑤ diseases and insect pests is light, spray as little as possible, in order to give full play to the role of natural enemies of insect pests and achieve insect control.