The shell pecan is also known as pecans and pecans of the United States. It is a world famous dried fruit. Originating in North America, China has introduced nearly 100 years of history. The 7-mu production plantation of thin-shelled pecans planted in Jiande Forest Farm of our city has an annual average maximum yield of 146 kilograms per mu, exceeding the average yield per unit area in the United States (100 kilograms per acre) in the United States, with a considerable economic benefit and promising market prospects. . The official Chinese name for the shell husk of Bemisia serrata is the police root nodule, which is a food-specific leaf-feeding pest of the family Helminthidae. It generally only harms shell pecans. The pest is very common in Jiande City Shell shell walnut nursery, young forest, forest, can be described as ubiquitous. The two-year-old seedlings are the most severely affected and can be jeopardized in spring, summer and autumn. The hazard rate of the strains can reach 100%. The annual seedlings and grafted seedlings are followed by them. Generally, summer and autumn are severely endangered, and spring hazards are lighter; young forests and pastures Lin had the most serious hazards in the first generation. The leaves of the affected plants are covered with large and small bugs, large like soybeans and small like sesame seeds. The pests hide in the insects and suck in the sap, causing the leaves to fall early, the plants to grow slowly, the tree vigor to be weak, and the yield to fall. The biological characteristics of the poliomyelitis occur four times a year. The wintering eggs begin to hatch at the end of March and early April, and the mid-April period is the hatching period. The newly hatched cubs began to climb to the buds that just broke their stomachs from 8 to 9 pm. From 10 to 14 o'clock, with the increase of temperature, the rhythm of the activities was accelerated. A hundred buds of cubs can often be gathered on one bud. As the buds continue to grow, the cubs are gradually fixed to the newly formed young leaves and form worms. The first generation of insects is larger and has a diameter of 3.2-8.5mm and a maximum of 12mm or more. The half of the same insect on the upper surface of the leaf is hemispherical, with a smooth surface, a half peach shape in the other half of the leaf, and a hairy cusp at the top. In the first stage of the insect infestation, there is a cavity in which insects feed and lay eggs. The first generation of worms began to mature in late May. The top of the worms began to dry and cracked. The insects climbed out of the cracks and climbed up to the young, tender new leaves to form the second generation of worms. The long-winged females crawling out of the worms (the adult females of the larvae have dry mothers, wingless females, short-winged females, long-winged females, females, and males.) The difference is that the division of labor is not the same.) To move females, they can move to nearby plants on a short distance to harm them. In the first half of June, it was the first generation of the protozoa infestation. The second, third, and fourth generations are smaller, with a diameter of 1-5mm, and the maturation stages of the galls are at the end of July, end of August, and early October. However, due to the irregular growth period, in fact, from the beginning of June to October, all the stages of the galls are present at the same time. In mid-to-mid-October, the mature females and males copulate in the galls, and the females climbed out of the galls and climbed into the gaps in the trunk of the tree trunk to lay their eggs during the winter. Each female only spawned eggs. grain. Control 1, seedling quarantine. When transporting thin shell pecan seedlings to other places, it is necessary to find out if there are any local police hazards. In view of the widespread distribution of this worm in our province, almost no nursery with no such damage can be found. Therefore, the seedlings must be disinfested prior to the exit of the nursery to prevent spread. Pesticides can be used 40% aqueous solution of iridescent EC 800 times. 2. In late March, before wintering eggs hatch, use 2.5% of deltamethrin emulsifiable concentrate, waste diesel oil, waste engine oil, and flour to prepare an ointment in a ratio of 1:40:60:100. Apply a brush with a width of 5cm in the middle and upper trunk. The left and right hoops stop the hatching of overwintering eggs that are crawling upwards. 3, nursery to the first generation of insects when the first time, you can manually remove the leaves with insects, bring out the nursery burned. 4, pesticide control should grasp several favorable opportunities for the emergence of pests. The first is the overwintering egg hatching period in mid-April. Second, in the first half of June, the first generation of insects was cracked, and the pests had a tumory period. If the timing of the prevention and control is missed for some reason, the second or third generation of pests can be treated early in the early of August or early September. The third is when pests are ready for winter before and after falling leaves. Pesticides can use both aqueous amiosulfuron and acephate in killing eggs. Spraying after falling leaves can increase the concentration appropriately, and pay special attention to the annual spraying of gaps in the base of the trunk, killing females crawling outside the infestation, and producing overwintering eggs. 5, in winter with Baume 5 degrees lime sulfur or 45% crystal lime sulfur 25-30 times liquid or white paint spraying (brushing) trunk, but also have some control effect.
Royal Jelly is also called Bee Milk. The fresh royal jelly is slightly ropy milk paste substance; it is the excretive mixture of nutrition gland and maxilla gland of the head of little worker bee. The worker bees use this to feed the 1-3 days` worker bee larva and drone larva, 1-5.5 days` queen bee larva and queen bee in the oviposition period. The royal jelly is the biologic product containing very complicated active elements which contains almost all the nutrition elements required by the growth of the human body.
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