Grab the key period to focus on controlling citrus hibiscus
There are four characteristics of citrus wood-borne tick-borne disease: First, the disease transmission rate is high, and the rate of transmission of a single adult can reach 70% to 80%; Second, it is a lifelong disease. After the nymph has acquired the pathogen of citrus hwangtungensis, it does not follow the suede. After disappearing, it turns into a high-inferior nymph or becomes an adult and still bears the pathogen of Huanglong disease. Third, as the wind spreads, the adult can fly 7 meters high and spread with the wind at a short distance. Fourth, rapid toxicity. These characteristics determine that to control the spread of Huanglong disease, it is necessary to kill adult and adult hibiscus quickly and effectively. The prevention and control of Citrus scutellariae should be based on prevention, and should not be sprayed when the raft is found. If you only spray medicine when found in the orchard, wooden clogs may have spread Huanglong disease. The current prevention and treatment of citrus hibiscus is mainly based on rapid and effective chemical control, supplemented by agricultural, biological, and physical control. Spraying chemical pesticides is still the most important measure to control citrus hibiscus. The critical period of spraying is the clearing period in the winter and spring, summer and autumn shoots. Because the raft only feeds on the shoots, the tipping period is also the peak of the raft. The clear garden in winter can eliminate overwintering adults and significantly reduce the number of spring populations. It is the most critical period for the prevention and treatment of citrus pods in the year. Followed by the new shoot extraction period, should start spraying control when the sprout length 0.5 ~ 1.0cm, with the growth of new shoots, 5 to 10 days after spraying again. The main agents are 21% thiamethoxam water suspension 3500 times, 25% quinoline EC 1000 times, 4.5% bifenthrin water emulsion 1500 times, 2.5% beta-cyfluthrin water emulsion 1500 times, 51.5% High chlorine chlorpyrifos EC 1000 times and so on. It is worth noting that before digging the Huanglong disease tree, it must be sprayed to kill the adult C. pleuroti on the diseased tree to avoid driving the diseased C. elegans adult into a healthy tree. Immediately after fruit picking, the winter clearing garden should be used to kill the raft. After the typhoon rain or heavy rain, we must pay attention to the timely killing of hibiscus. The adult citrus psyllids have the ability to migrate long distances. In the typhoon rainy season and strong convective weather (May-September), the adult pupae of the dragonfly disease in the southeastern part of the area with severe yellow dragon disease will be blown by the wind and will be moved passively over a long distance. Adults in the woodpile near the Huanglong Disease Orchard will also be blown up by strong winds and fly into the orchard. Therefore, after the typhoon rain and storm, they should be sprayed and killed immediately on sunny days. In addition, auxiliary measures such as agricultural physical control can also be used, such as clearing the host plants of hibiscus, such as yucai and yellow husks around the orchard. Through pruning, fertilizing, and irrigation to promote new shoots and uniform, shorten the drawing time, and promote new shoots and mature. Yancheng Rongtai Labware Co.,Ltd , https://www.shtestlab.com