Radishes are very seriously affected by locusts in the late winter and early spring. The locusts are adsorbed on the stems and leaves of radish, sucking sap, making the radish plants malnutrative and affecting the elongation and enlargement of the underground fleshy roots, and causing hollowness, reducing yield, reducing quality, and also transmitting viral diseases and inducing soot, Causes leaf curling and beam tops. Therefore, radish should pay attention to prevention and control of aphids at the beginning of winter and early spring to protect stems and leaves in order to ensure high yield and quality of radish. Specific prevention methods are as follows: At the end of winter and early spring, attention should be paid to the inspection of radish stems and leaves. When it is found that there is aphid activity on the stems and leaves, it is necessary to continuously spray the leaves with 2-3 times 1500 times 3.2% avermectin aqueous solution, or 1500 times 20 times. An aqueous solution of imidacloprid, or 1000 times 25% pymetrozine aqueous solution, or 1500 times 0.5% veratrine aqueous solution, spray once every 7 to 10 days, evenly spray all the stems and leaves, to start dropping drops of water is appropriate . In addition, pay attention to ensuring the moisture supply. Because the radish is more vulnerable to aphids in the absence of water and drought. Therefore, generally every 2 to 3 days, water once every 8 to 10 kg per square meter radish. When pouring water, be sure to pay attention to the need to pour clean water, do not pour turbid muddy sewage, so as not to induce aphids and exacerbate the damage. 10-15 days before radish harvesting, if any locust is found to be harmful, 10-15 times of dry and pure ash should be used for leaching the clear liquid, or 5 to 10 times the dilution of biogas slurry, no toxic residues, the same day of spraying. It can be harvested without polluting the radish and not harming human health. White Pepper Powder Usage,Pepper Powder Usage,Bottled White Pepper Powder,Bottled Pepper Powder jiangmen city hongsing food co., ltd. , https://www.jmhongsing.com