I. Contraindications of Phosphapids in Orchard Use: Peach trees are sensitive to them and should not be used. Trichlorfon, dichlorvos: There are great phytotoxicity to stonefruit trees and should not be used; there are phytotoxicity to apple varieties such as Golden Delicious, Field Marshal, Dioscorea, Cockscomb, etc.; they are used in other apple trees and should be used in young fruit (flowers) After and physiological fruit drop) spray. Dimethoate, omethoate: Apricot and Lie are sensitive to the emulsion with a dilution factor of less than 1500 times. When using it, the cell should be tested first, and then the safe use concentration should be determined before large-area use. Insecticidal ring: Some fruit varieties are sensitive and should be tested for phytotoxicity before use. Rice Fungsan: Some varieties of peaches, grapes, and apples are sensitive to them and are prone to phytotoxicity and should not be used. Dicofol: The varieties of hawthorn and apple, such as ruby ​​and Xuguang, are sensitive and easy to produce phytotoxicity and should not be used. Keziol, Keke: The pear tree is sensitive and should not be used. Arsenic preparations: Certain varieties of stone fruits, apples and pears are prone to phytotoxicity and should not be used. Bordeaux mixture: Peach, Li, and Hawthorn are sensitive to the growing season. No matter what kind of preparation, they are prone to phytotoxicity. When the lime in Bordeaux mixture is lower than the multiple type, pear, apple and apricot produce phytotoxicity; hawthorn and apple. Spraying after flowering and fruit growing period, fruit rust is heavier and should not be used; apple medicine should be used as late as possible during its growth. Lithosulfide mixture: Peach, plum, apricot, grape, pear, etc. are used when young tissue is prone to phytotoxicity and should be used with caution or avoidance. Glyphosate, Gram-free: all herbicides, all fruit trees are sensitive to them, can not be used in fruit trees, can only be used for directional spray between fruit trees weeding. Apricot trees are sprayed with this herbicide to prevent weeding. It is very easy to produce phytotoxicity and herbicide should be prohibited. Atrazine: Peach is sensitive and should not be used. 2.4-D Butyl Chloride, 2 A 4 Chloride: All fruit trees are very sensitive to them and should not be used on fruit trees. Second, the orchard phytotoxicity defense measures 1. Although all types of pesticides are equipped with instructions for use, but it refers to the general term. In order to ensure the safety of medication, the community test should be conducted before use. After 3 days to 5 days, there is no change phenomenon, and then a large area of ​​use. 2. When pesticides are used, they must be used strictly in accordance with the prescribed concentration of use and the amount per unit area. Do not arbitrarily increase the amount and expand the scope of use. 3. It must be formulated and used strictly in accordance with the formulation and use methods specified in the specification, and the preparation and use methods must not be simplified. 4. Formulate and use pesticides in strict accordance with the external environmental conditions specified in the specification to improve the quality of dispensing and application. 5. When using pesticides, pay attention to the safety interval, the appropriate period of use, and the safe withdrawal period of pesticides so as to avoid phytotoxicity and toxic effects on humans and animals. Author unit: Association of Science and Technology, Linxia County, Gansu Province
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