Different types of flowers, different growth periods, should be cautious when selecting pesticides. The wrong pesticides will cause great losses to flowers, especially those that are sensitive to pesticides. The choice of different flowers for pesticides should be based on the following principles: Dimethoate, Omethoate: Kiwifruit is sensitive, avoiding it; for the plum, cherry, peach, eucalyptus, stalked sea bream, apricot, pear and other Rosaceae ornamental plants, It can produce obvious phytotoxicity; Dimethoate is also very harmful to the shrimp flower and coral flower of Jujube. If it is sprayed with dimethoate from June to October, it often causes the petals to curl, and the leaves, inflorescences and twigs fall off. , lost its ornamental value; in addition, dimethoate also has a certain impact on melons. Therefore, it is not appropriate to use dimethoate and omethoate in the above ornamental plants. Dichlorvos: Dichlorvos has obvious phytotoxicity to ornamental plants such as plum, cherry, peach, apricot, eucalyptus, 20th century pear, and Jingbai pear. Usually, other types of pesticides should be used instead. Dichlorvos also has different degrees of phytotoxicity to rhododendrons, taro, kiwi, medlar, walnuts and melons. When using pesticides to control pests of these plants, care should be taken to avoid unnecessary losses.
Trichlorfon: It has phytotoxic effects on cherry, plum, and apple varieties.
Stone sulphur mixture: Stone sulphur mixture has phytotoxicity to Rosaceae plants such as peach, plum, plum, pear, etc. If stone sulphur mixture is used on these plants, it is best to spray in the deciduous season, not in the growing season or flowering period. Stone sulphur mixture has certain phytotoxicity to kiwi, grape, cucumber and legume flowers.
Bordeaux mixture: sensitive to peach and plum in the growing season; below, the pear, apricot and persimmon are susceptible to phytotoxicity. When the amount is higher than the amount, the grape is susceptible to phytotoxicity.
Rosin mixture: In the summer, the use of rosin mixture has obvious phytotoxicity to persimmon, and it has an adverse effect on citrus in spring and summer.
Tobuzin: Dobutin should be avoided when controlling pests and diseases of kiwifruit.
Petroleum emulsion: It is easy to cause phytotoxicity to certain peach species, preferably in the deciduous season.
In order to prevent pesticides from causing phytotoxicity to many ornamental plants, one is to purposefully switch to other high-efficiency and non-toxic pesticides; the second is to minimize the use concentration; the third is not to spray under high temperature and high humidity conditions; in order to avoid losses, Also pay attention to the reasonable mixing of pesticides.
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