The major pests and diseases that occur during the growth of rapeseed are: aphids, cabbage caterpillars, virus disease, sclerotinia, downy mildew; grass damage: see Aunt, Poona, swine fever, big nest dishes. The control of these diseases, pests and weeds can be carried out in two stages, and according to the degree of severity of the different stages of the occurrence of the use of drugs, we can control the hazard within the allowable range. 1. Seedlings of rape seedlings mainly consist of roots, stems, leaves, and
Other vegetative organs. This stage mainly controls weeds, aphids, cabbage caterpillars, and viral diseases. 1, grassland damage to paddy fields to see aunts, per acre with 10.8% efficient cover grass can 30 ml or 5% fine grass 50 grams of water spray 60 kg, in the grass weeds three to five leaf application period; In the dry field, most of the piglets, big nest vegetables, and mother-in-law are used. In the second to fourth leaf stage of the weeds, spray 40 kg of water and 60 kg of water per acre with 50% high tec. 2. The high temperature of the locusts, the drought and the rain, the rape grow green, and it is favorable for its reproduction. It can be controlled by 10% Dagong Chen or 4.5% beta cypermethrin. 3. Cabbage caterpillars mainly feed on the leaves, resulting in holes or nicks in the leaves. When the leaves are severe, they can be used to control 50% phoxim EC or 2.5% Uranus EC or 2.5% Kung Fu EC 3000-4000 times. 4, virus disease, also known as mosaic disease, common diseases, serious impact on the yield of a serious occurrence, while reducing the oil content of rapeseed, infected plant resistance decreased, easily infected by other diseases. The disease mainly depends on the spread of locusts in the fields. Therefore, controlling aphids is the key. Second, the flowering period in this period to control Sclerotinia, downy mildew, and aphids. 1, Sclerotinia disease can occur from the seedling stage to maturity, but the incidence of the most prosperous flowering period. Such as high temperature and rainy flowering period, combined with a large amount of bacteria, the disease may have a popular chance. In the early flowering period to full flowering period, use 50% carbendazim WP 1000 times spray, spraying should pay attention to spray in the rape, the lower stem, leaves, in order to improve the control effect. 2, downy mildew pathogens damage rape calyx, can cause swelling and bending into a "head-turning" shape, it is commonly known as "head disease." When the diseased leaf rate reached 10% at the early flowering stage, the first control was conducted, and the control was repeated every 5-7 days. The commonly used agents are 50% carbendazim WP, or 75% chlorothalonil wettable powder. 3. In the period of locusts, aphids infract the inflorescences, causing the inflorescence to grow stagnant and deformed, resulting in reduced results. Can be combined with the control of sclerotinia, downy mildew compounding drugs, that is, in the control of sclerotinia or downy mildew in the drug solution by adding a big meritorious deterrence or deterrence net to carry out concurrent cure.
Fresh White Radish
Fresh Vegetables,Garlic,Ginger,Onion
Fresh Fruits,Fresh Vegetables Co., Ltd. , http://www.nbvegetables.com