Due to the different types of flowers, the differences in growth and development stages often cause some common flowers to cause phytotoxicity when using pesticides . Light, defoliation, falling flowers, and fruit drop occur, and the heavy ones cause plant death, causing great losses. Therefore, it is especially important to select pesticides correctly for ornamental plants that are sensitive to pesticides. The following is an introduction to the phytotoxicity caused by common pesticides.

Dimethoate, Omethoate: Kiwifruit is particularly sensitive and avoids it; it can produce obvious phytotoxicity to plum, cherry, flower peach, eucalyptus, stalked sea bream, apricot, pear, etc. It 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 be rolled up, and the leaves, inflorescences and small schools fall off and lose their ornamental value. In addition, music It also has a certain impact on melons. Therefore, it is not appropriate to use dimethoate and omethoate in the above ornamental plants.

Being enemies: Dichlorvos has obvious phytotoxicity to plum, cherry, peach, apricot, eucalyptus, 20th century pear, Jingbai pear and other ornamental plants. Usually, other types of pesticides should be used instead. Dichlorvos also has different degrees of phytotoxicity to rhododendrons, taro, kiwi, sorghum, 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 blossoms and plum blossoms.

Stone sulphur mixture: Stone sulphur mixture has phytotoxicity to 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. Use; stone sulfur mixture has certain phytotoxicity to kiwi, grape, cucumber and legume flowers.

Killing pine: use the killing insects in the hot season, have serious phytotoxicity to the pomegranate, and have certain damage to the flowers of the cruciferous family.

Bordeaux mixture: sensitive to peach and plum in the growing season; when less than double, pear, apricot and persimmon are susceptible to phytotoxicity. When the amount is higher than that, the grape is susceptible to phytotoxicity.

Pine fat tableting agent: In the summer, the use of rosin mixture has obvious phytotoxicity to persimmon, and the spring and summer season has an adverse effect on citrus.

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 rational use of pesticides.

More pesticide knowledge , please pay attention to China Pesticide Network

(Source: China Apple Industry Network)

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