The black spots and dark spots appearing in the fruit of the bagged fruit tree before and after the maturity period, in most cases, the type or quality of the agent sprayed at the young fruit stage is inappropriate, causing the skin of the young fruit to be injured, providing an invasive passage for some parasitic bacteria, and finally Black or brown spots are formed on the fruit surface. The use of 2,4-D butyl ester in large doses after wheat jointing will cause wheat spike differentiation to be disturbed, and wheat ears often appear after twisting. The use of bensulfuron-methyl in large doses can also cause hidden phytotoxicity to the peanuts of the lower jaw, with symptoms such as slow growth of peanuts and short roots.
Many pesticides, especially herbicides, tend to have a significant sensitivity to a certain stage of growth of a certain crop or crop. For example, peach trees are sensitive to copper preparations, dichlorvos, trichlorfon, dimethoate, and chlorpyrifos. Peanuts are sensitive to sulfonylurea herbicides such as bensulfuron-methyl and metsulfuron-methyl, and wheat is sensitive to chlorpyrifos and atrazine. The class is sensitive to flusilazole, propiconazole and the like. Some inferior agents are also particularly susceptible to phytotoxicity in crops in sensitive periods. In order to save labor, some farmers sometimes pour the medicine that should be divided into three buckets of water into a bucket of water, which is easy to cause excessive pesticides in the crop to cause phytotoxicity.
There are three main ways to circumvent phytotoxicity. First, rational choice of pesticides, try not to choose the type of chemicals that are sensitive to crops; second, choose suitable weather conditions to use pesticides, avoid high temperature, drought, high humidity, low temperature, low light or high light when spraying pesticides; Require the dosage and operating procedures to use the drug, accurately calculate the dosage, dilute step by step, and clean the spray device as soon as possible after spraying the herbicide.
Plant Protection Institute of Chinese Academy of Agricultural Sciences Zhao Zhanzhou
Farmers Daily
Antioxiant With Three Functional Groups
Chemical name:1,3,5-Tris(3,5-di-tert-butyl-4-hydroxy benzyl)-s-triazine-2,4,6-(1H,3H,5H)trione
Physical Properties: White Crystalline Powder Assay: ≥98% Melting range: 218-224℃ Ash: ≤0.006% Light Transmittance:425nm≥95% ,500nm≥97% Volatiles: ≤0.5%
Introduction: The product is soluble in solvents like acetone,chloroform and amide, and insoluble in alkane and alcohols. Flash point:289.4℃kindling point:302℃.
Applications:The product is a kind of tri-function group phenolic antioxidant, without pollution and coloring up. Dependent on high molecular weight and melting point, it has low volatility, low transferring,and good water extraction resistance, white equips plastics with resistance to thermo-oxidation and light-oxidant. AT-3114 suits for PE,PP,PS,ABS,nylon,PVC,PU,cellulose and synthetic rubber, especially effective for polyolefin.When used with UV absorbent and phosphite ester,a synergistic effect can be reached, thus enhancing the thermo-stability and light stability.
This product can be used to contact food polyolefin products(contact fatty and non-fatty foods).The photo-thermal stability can be further improved by synergism with UV absorber or phosphates.It can prevent the aging of the polymer by heat and oxidation, and also has anti-light property. It is mainly used as an antioxidant for polypropylene and polyethylene, which has the functions of heat and light stabilization. There are synergistic effects with photostabilizers and adjuvant antioxidants. The product is low in toxicity. POLYOLEFIN products available for food exposure at a dosage not exceeding 15 % of the main materials.
Antioxiant With Three Functional Groups
Antioxiant With Three Functional Groups,Polyethylene Additive,High Melting Point Antioxidant
Tianjin Xindafeng Import & Export Trade Co., Ltd. Tangshan KeAo chemical additives Co., Ltd. , http://www.tskaantioxidant.com