With the arrival of the beginning of summer, the temperature in Hebei province rapidly rises, and the vegetables in the open field have entered a period of high growth. Various pests that are suitable for high temperatures begin to occur. According to a survey conducted by the Hebei Province Agricultural Pest Biological Monitoring Network, pests of cruciferous vegetables are beginning to be harmed. The propagation of rapeseed meal is accelerating, and the virus disease will increase in popularity. Vegetable growers should step up prevention and treatment. 1. Plutella xylostella and Pieris rapae. Kangbao County light induced test, on April 15 to see the diamondback moth, beginning to see the period 12 days earlier than usual. The survey of cabbage fields in Zhengding County showed that there were four hundred larvae and the current diamondback moth was at the initial stage. The occurrence of cabbage caterpillar occurred earlier than the diamondback moth. The Zhengding County System Survey April 7 saw the eggs and larvae in the field. On April 30, the census had 100 eggs and 16 larvae. Pingshan County investigated on May 4th, the county cabbage farmland cabbage caterpillar has generally occurred, generally 100 insects 10 to 20 heads, the highest 40 heads. Since the temperature is lower this year and precipitation is more, the current occurrence is lower than the previous year. 2. Dishes. In recent days dishes have begun to rise. In the Zhengding County system survey, the cabbage planting rate was 50% on April 25th and 100 plants were 452. On April 30th, it was 54% and 100 plants were 742. Pingshan County surveyed on May 4th, cabbage hundred strains 30 to 50 heads, up to 250 heads. 3. Viral disease. There will be a peak of viral disease in May of all year round, especially for melons and vegetables. In addition to the spread of aphids, symptoms of diseased plants increase significantly with increasing temperature. According to the forecast of the Provincial Meteorological Observatory, there are three rainfall processes in the middle and late May, which have adverse effects on the occurrence of pests. The temperature in May is 0.5°C higher than normal, which is conducive to the occurrence of aphids and viral diseases. Prevention and control of vegetable pests and diseases should implement green prevention and control technologies. Prominent use of physical and biological control, selection of biological agents to fight pest control, so that natural enemies can be protected, the ecological balance, so that the level of pests and diseases gradually decreased, reducing the hazards, thereby reducing the frequency and quantity of pharmaceutical use. 1, carry out light trapping. Set insecticidal lamps to trap pests and reduce the number of pests; or set up traps to trap and kill male moths to reduce spawning of pests. 2. Promote the use of biological agents. Bacillus thuringiensis (trade name: BT, Enemy, etc.), used to control cabbage caterpillars, diamondback moth. Bacillus thuringiensis emulsion with 100 grams of mu, 1000 times the water. Plutella xylostella granulovirus (commercial name: Huanye No.2, etc.) is used to control diamondback moth, with 150-200 g mu, and 300-500 times diluted vegetable shoots. Matrine (commodity name: Lu Yu, Xia Xia, Jing Lu, etc.), 0.3% water solution with 90 to 150 ml of mu, control of cabbage caterpillars. 100-150 ml/mu control of diamondback moth. 50 ~ 70 ml / mu control dishes, spray uniform and thoughtful. Doxorubicin (commercial name: dish hi, hunt flies, escort, etc.), mu 25 g/L suspension 33-50 ml, control diamondback moth. Beauveria bassiana, with 100 million spores per milliliter of bulbar spore oil suspension 100-120 ml to control water spray. 3. Chemical pesticides. Several agents that have not yet developed resistance are used interchangeably. In the low-invasive stages of pests, 59% of Sitabao can be used to control resistant cruciferae Plutella xylostella, Spodoptera exigua, and ovicidal effects; cyhalothrin (trade name: Kung Fu, monthrin, cyhalothrin) For the control of diamondback moth, etc.; profenofos (commercial name: Coulomb, unification), a broad spectrum of insecticides, acaricides, anti-resistant pests, and a certain degree of ovicidal effect. The control of cabbage caterpillar, diamondback moth mu 40% EC 50 ~ 100 ml, 1000 times water. 4. Prevent melon and solanaceous vegetables virus disease. Can be sprayed with 0.5% amino oligosacchine 600-800 times solution at the seedling stage, after planting, and in the fruiting stage (stem-plant stage), with the use of ningnanmycin (trade name: bacillus gram), 2% Aqueous agent 200 ~ 250 times liquid, can improve the immunity of vegetables, prevent virus disease. After the onset of the disease, treatment with green leaf god 200 grams of water 30 kg spray control.
Intestinal localization was administered to reduce adverse effects.
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