First, the main disease 1, date rust. The disease mainly damages the leaves and sometimes affects the fruit. On the back of the victim leaves, scattered light green dots, after the gradual grayish brown, and finally lesions turn yellow-brown, resulting in a prominent summer spores heap. In the place where the front of the blade faces the summer spore heap, irregular brown-green spots appear and gradually lose their luster and turn brown into brown spots. Most of the bacteria overwintered on diseased leaves. After the rain in late June, the wintering spores began to invade and invade the leaves. The disease began in mid-July and the pathogens continued to infect in August and September. The leaves of the severely damaged leaves began to shed large amounts of fallen leaves. Rainy and high humidity are the main conditions for the occurrence of date rust. Prevention and control measures: (1) Strengthen cultivation management, increase organic fertilizer, make tree growth robust, and increase tree disease resistance. (2) During the dormancy period in winter, through proper pruning, the park maintains good ventilation and light transmission conditions, thoroughly removes diseased leaves, and burns them in a concentrated manner to reduce overwintering germs. (3) Control of spraying: In late June, before the germs began to invade, spray protection, spray once every 15-20 days, and spray 3-5 times. The commonly used agents are 50% carbendazim 800-1000 times, 200 times the amount of Bordeaux mixture, 50% tetromycin special 600 times, 25% Triadimefon WP 1000-1500 times and so on alternately, the effect is better. 2, jujube anthracnose. The disease mainly damages jujube fruit and can also harm the leaves. Damage to the fruit, brown spotted water spots appear initially, and after enlargement, it becomes a nearly circular pitted spot. The spot expands densely with gray to black spots, causing fruit drop. The diseased fruit is bitter and difficult to eat, and the leaves will become yellow. Fall off. When it rains, it will increase the incidence. Prevention and control measures: (1) Strengthen the management of fertilizer and water, improve the soil, make it possible to pour drought, energy, and organic fertilizer, promote the robust growth of trees, and improve the resistance of trees. (2) Clean orchard: After falling leaves, all the fallen leaves and fruit drop in the garden will be burned or buried deeply. (3) Chemical control: Before the budding of jujube trees, 1 spray of Bami 5 degree lime sulfur was sprayed. In the middle and the middle of June, a 200-fold lime-type Bordeaux mixture was sprayed once. In the middle and late July and the beginning of August, each fungicide was sprayed once. The commonly used agents were 65% zeocin 500 times, 50% carbendazim 800-1000 times, and 75% chlorothalonil wettable powder 600 times. , 200 times the lime times Bordeaux mixture and so on. 3, jujube disease. The disease mainly damages jujube trees and wild jujube trees, and is a devastating disease of jujube trees. After jujube was infected, both the aerial and underground parts showed abnormal reproductive status. The above-ground parts showed flowering leaves, branches and leaves caused by abnormal development and growth of shoots, yellowing of leaves, and spoon-like curls. The underground part is mainly manifested in the roots. Saplings will die 1-2 times, the trees will become infected, and they will die after 3-6 years. Jujube tree disease spreads through grafting or fieldworm pests. Prevention and control measures: (1) Eradicate diseased plants and diseased roots to prevent infection. (2) Select the disease-free scion and graft the seedlings. (3) Choose varieties with strong disease resistance, strengthen cultivation and management, and promote robust growth of trees. (4) Control pests of disease vectors, spray 20% pyrethroid 3000 times or 10% imidacloprid 3000 times. Second, the main insect pests 1, peach borer. In the northern part of China, it takes 1-2 generations a year. Old larvae are used for wintering in winter in the soil. They are unearthed in mid-May in the following year, and are continuously excavated in the middle and early June. The mid-to-late June is the most prosperous period, and adult eclosion occurs in July. In the middle of July, the larvae hatched and the larvae began to hatch fruit. The larvae lived in the fruit for about 25 days. The fruit pods phlegm and goose, and the second generation continued. After the middle of July, the larvae of the pods were harvested. Wintering occurs only for 1 generation. Prevention and control measures: (1) The tree tray is used for earth-cultivation or film-covering. Before the larvae are unearthed, soil is compacted and compacted within 1 m around the trunk to prevent larvae from unearthing. Before the film is covered, it is sprinkled with 5% phoxim granules in the ground and then shallowly scooped. (2) Appropriate medication. When the egg rate reaches 1-2%, spraying control begins. Continuous spray 2-3 times, spray once every 15 days, commonly used drugs have 20% of chrysanthemum 2000-3000 times, 30% of Tao Xiaoling EC 1500 times, careful when spraying. 2, date feet. The buds, leaves and buds of larvae that injure the jujube occur one generation per year. They spend winters in the soil about 10-15 cm deep around the canopy, and they become adults after the end of March in the following year. They lay eggs after mating, and the female adults are wingless. Climb to the trunk to lay eggs. After about 25 days of the egg period, the larvae hatch into the trees in mid-to late April to mid-May. The larvae have small food intake from the 1-3th instar. The main food is young leaves, and the food intake of the 4-5 instar larvae increases greatly. The leaves are often eaten. After the larvae have developed at the fifth instar, they begin to plough into the earth in late May and begin in mid-June. Prevention and control measures: (1) In combination with deep plowing of soil in the winter, pick and kill overwhelming insects. (2) In early March, a thin film about 10 centimeters wide is tied around the base of the tree trunk at a height of about 20 centimeters from the ground to prevent females from spawning and laying eggs. Every morning or evening, adults are killed by hand under the tree, or cypermethrin pesticides are sprayed around the trunk. Kill hatched larvae. (3) Spraying on trees to prevent and cure. If the trees are not completely controlled and there are still dangers of trees, they can be sprayed with chemicals and treated with 25% diflubenzuron 2000 times. 3, jujube armyworm. Also known as the leaf worm, the larvae damage the leaves, flowers, and fruit, and stick the jujube tree branches together to make the leaves roll into dumplings and harm them, or the fruits are sucked into the fruit and cause fruit damage. Fall early. The worm occurred in 3 generations in 1 year. The pupa was shed in winter under the old quagmire and in the crevices. The eclosion began in late March of the following year. In mid-April, it was the eclosion period. After mating, 2-4 days after mating, 1-2 after mating. Spawning eggs, the egg period 10-15 days, the first generation of larvae occur in the early May, the second generation larvae occur in the late June to early July, the third generation in the middle and early August. Prevention and control measures: (1) In the beginning of September, the grass stems are to be tied to the trunks to trap the larvae on the earth to cover the overwintering season, and to collect the grass stems in winter to burn or bury them deeply. (2) scraping old cracked skin in winter to reduce the source of overwintering insects. (3) spraying control, pay close attention to the first generation of larvae control, spraying control in the larval stage in time, with 90% trichlorfon 1000 times, 20% cypermethrin 3000 times alternately used, the effect is good.