The symptoms of pesticide phytotoxicity on plants are as follows:
1. Spots: Spot damage mainly occurs on the leaves, and sometimes on the stems or fruit epidermis. Common brown spots, yellow spots, dead spots, net spots and so on.
2, yellowing: yellowing may occur in the stems and leaves of plants, with more yellowing of leaves. The main cause of yellowing is that pesticides hinder the normal photosynthesis of chlorophyll.
3, deformity: deformity caused by phytotoxicity, can occur in the stems and roots of crops, common curls, clumps, swollen roots, deformed ears, deformed fruit and so on.
4, withered: phytotoxicity withered often the whole plant symptoms, mostly caused by herbicides. After the watermelon seedlings are harmed by the green mellon, the leaves are scorched, the plants are withered, and even the dead seedlings.
5, growth stagnation: This kind of phytotoxicity is to inhibit the normal growth of crops, so that the plant grows slowly, herbicide phytotoxicity generally has this phenomenon, but how much different.
6. Infertility: Infertility is a kind of phytotoxicity caused by improper use of crops during reproductive growth.
7. Shedding: Most of this phytotoxicity is manifested in fruit trees and some dicots, with symptoms such as falling leaves, falling flowers, and falling fruits. After the peach tree is harmed by the copper preparation, it will cause leaves. The use of methamidophos in the flowering period of pear trees can cause falling flowers.
8. Inferior fruit: These phytotoxics are manifested on the fruit of the plant, which makes the fruit smaller, the shape is abnormal, the quality is deteriorated, and the edible value is affected. Watermelon is harmed by ethephon, and the melon is dark red and has an odor.
9, the germination rate is reduced: This phytotoxicity is manifested in the seed germination, germination, emergence rate is low, severe cases of lack of seedling ridges. For example, triadimefon mixed wheat seeds, the active ingredient of the drug exceeds 0.05% of the seed amount, which significantly reduces the germination rate of wheat seeds.
Huaxian Agricultural Technology Promotion Center Lu Shuguang
1. Spots: Spot damage mainly occurs on the leaves, and sometimes on the stems or fruit epidermis. Common brown spots, yellow spots, dead spots, net spots and so on.
2, yellowing: yellowing may occur in the stems and leaves of plants, with more yellowing of leaves. The main cause of yellowing is that pesticides hinder the normal photosynthesis of chlorophyll.
3, deformity: deformity caused by phytotoxicity, can occur in the stems and roots of crops, common curls, clumps, swollen roots, deformed ears, deformed fruit and so on.
4, withered: phytotoxicity withered often the whole plant symptoms, mostly caused by herbicides. After the watermelon seedlings are harmed by the green mellon, the leaves are scorched, the plants are withered, and even the dead seedlings.
5, growth stagnation: This kind of phytotoxicity is to inhibit the normal growth of crops, so that the plant grows slowly, herbicide phytotoxicity generally has this phenomenon, but how much different.
6. Infertility: Infertility is a kind of phytotoxicity caused by improper use of crops during reproductive growth.
7. Shedding: Most of this phytotoxicity is manifested in fruit trees and some dicots, with symptoms such as falling leaves, falling flowers, and falling fruits. After the peach tree is harmed by the copper preparation, it will cause leaves. The use of methamidophos in the flowering period of pear trees can cause falling flowers.
8. Inferior fruit: These phytotoxics are manifested on the fruit of the plant, which makes the fruit smaller, the shape is abnormal, the quality is deteriorated, and the edible value is affected. Watermelon is harmed by ethephon, and the melon is dark red and has an odor.
9, the germination rate is reduced: This phytotoxicity is manifested in the seed germination, germination, emergence rate is low, severe cases of lack of seedling ridges. For example, triadimefon mixed wheat seeds, the active ingredient of the drug exceeds 0.05% of the seed amount, which significantly reduces the germination rate of wheat seeds.
Huaxian Agricultural Technology Promotion Center Lu Shuguang
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