Vegetable worms, also known as borers, are one of the more difficult pests to control in cruciferous vegetables. Its larvae bore the heart and growing points of the seedlings and had the habit of transforming the plants. A larvae could harm 4-5 strains a year. Vegetable pods occur every 3-4 generations, causing vegetables to lose seedlings and ridges, stop growing, or fail to serve. In recent years, due to the extensive use of various pesticides, the drug resistance of rapeseed meal has been increasing year by year and it has been difficult to prevent and control it. We have combined many years of production experience to explore a set of effective integrated prevention and control measures, which are summarized below for reference by relevant personnel.
First, eliminate overwhelming insect sources. After the vegetables are cooked, the soil seams and the soil around the vegetable roots, the soil seams, and the residual plants around them will cause the silkworms to sprout. The body is about 7mm long, yellow-brown and five vertical lines are visible on the back of the abdomen. Prevention and control should promptly remove stubborn leaves in the field, bury or burn, and deep-dip the land, eliminate a large number of insect sources, and reduce the harm to the next season vegetables.
Second, the use of agricultural measures for prevention and control. The 2-4 leaf stage of cruciferous vegetables met with the larval stage and suffered serious damage. Production can be based on the previous generation of rapeseed larvae during the prosperous period, the appropriate adjustment of vegetable sowing, so that the seedlings 2-4 leaf stage and vegetable larvae occur at the peak period of staggered; followed by combination of seedlings, Dingmiao and other agricultural activities, remove pest vegetable seedlings, and be destroyed Again, we must avoid cruciferous vegetables for continuous cropping or replanting, and avoid scattered cultivation of cruciferous vegetables in the field.
Third, carry out the regulation of the ecological environment. High temperature and low humidity are conducive to the occurrence of rapeseed meal. In drought years, it is necessary to pay attention to irrigation water in the morning and evening, increase the humidity in the field, and change the microclimate in the field suitable for rapeseed, which will help reduce pests.
Fourth, strengthen physical control measures. Cruciferous vegetables covered with polyethylene pest control network can effectively block the adult spawning, reduce pest occurrence; the use of adult phototaxis, black light trapping adult insects in the field, usually 1-2 per hm2 set 1-2, can reduce adult oviposition hazards.
Fifth, the use of pharmaceuticals to help control. The spraying was started from the seedlings and the spraying period was sprayed at intervals of 7-10 days. Sprays were sprayed 2-3 times, and the liquid sprayed onto the leaves. Note that during a growing season, each type of insecticide should be used only once or twice and should be used in rotation with other types of pesticides in order to avoid drug resistance and increase the difficulty of control. For example, the first spraying can use antibiotic pesticides, such as 0.2% Anoxone 1 750 times, or 1.8% Anoxa 3500-4000 times; secondary spraying is switched to pyrethroids. Insecticides, such as 2.5% deltamethrin EC, are sprayed at 3000 times; three sprays can be sprayed with the Bt insecticide Kono Chison 500-800 times. Pay attention to avoid spraying at noon, so as to avoid decomposition of the liquid caused by direct light, such as spraying after spraying.
Ulcers is commonly known as gastric ulcer and duodenal ulcer, the formation of ulcers is closely related with gastric acid or pepsin digestion. Ulcer disease is a chronic disease, its seizures were cyclical, episodes and remission of alternating appear, and the onset of abdominal pain has a certain rule. The main cause of ulcers include: 1. Helicobacter pylori infection 2. Bad diet 3. Mental factors 4. Drug stimulation. Many patients with gastric ulcer who have taken non-steroidal anti-inflammatory drug history, these drugs will stimulate our gastric mucosa, causing damage, then it will cause ulcer disease over time. The current anti-ulcer drug is mainly focused on reducing gastric acid and enhance the protective effect of gastric mucosa. In recent years,the research and development of anti-ulcer drug progress is faster, effective drugs have been listed, sales are also rising.
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