Reasons for the use of corn for medicinal use and control methods: when planting corn seeds, using pesticides or herbicides, over a certain concentration, can form leaf stalks with abnormal color, such as white spots or brown spots, young shoots and roots curled or thickened, plants Growth is inhibited, the leaves are shortened or the grains are exposed; when the fertilizer is used excessively or the insecticide is applied too much, the seeds will germinate or die after being germinated, the remaining seedlings will be dwarfed, and the leaves will turn yellow or die. Causes of corn remedies for vegetables: dichlorvos, trichlorfon, phoxim, 2.4-D and chemical fertilizers may cause the above symptoms. Excessive soluble nitrogen and potassium fertilizers may inhibit seed germination when they are close to the seeds. The seedlings died after being unearthed; 2.4-D applied or drifted. The leaves can be curled into onion leaves, the lower stems and leaves are clustered together, and the aerial roots are not in contact with the soil; excessive application of phoxim can whiten the leaves partially or mostly, causing the leaves to dry and freeze like a freeze. The mechanism of chlorophyll and other organophosphorus pesticides causing discoloration and other phytotoxicity is that the hydrophobic organophosphorus pesticide is adsorbed by the green leaf body or surrounding tissues, causing the chloroplast function to fluctuate, thereby hindering the electron conduction reaction, ie, Hill reaction, inhibition. Photosynthetic, discoloration occurs, the more serious the phytotoxicity, the lower the carbohydrate content in the body and the relative increase in total nitrogen. Production is different due to conditions such as corn variety, developmental stage and environmental factors. Different degrees of phytotoxicity will cause the leaves to die, discolor, deformity and so on. Vegetable corn harm control method: Rectangular Hollow Section,Hollow Section Steel,Steel Box Profile,Metal Box Section Guangdong Tianchen Steel Structure Engineering Co. Ltd. , https://www.tcsteeltech.com
(1) Formulated fertilization technology, timely and appropriate application, not excessive.
(2) When using herbicides , strictly select the variety and master the dosage, avoid the concentration is too high, and should not be sprayed directly in the flare period.
(3) Do not use sensitive insecticides such as trichlorfon and dichlorvos in corn fields, and strictly control the dosage when applying phoxim to control underground pests.
(4) If the concentration is too high, it should be watered immediately.
(5) After the occurrence of phytotoxicity, it is necessary to strengthen management.
(6) Spraying Fengbao I type active liquid fertilizer 400~500 times if necessary.
Causes and prevention methods of vegetable corn damage