Crops to the adr of the eight symptoms
1, wither
This kind of phytotoxicity symptoms tend to whole plant performance, great majority is caused by improper use of herbicides.Such as glyphosate phytotoxicity of rice seedling, can cause the plants withered and yellow seedling death;Watermelon seedlings by green Cameron after the adr, show the leaves yellow, withered leaves, plant contraction, to death.
2, yellowing
This type of adr in plant stem leaf area all have performance, with blade yellowing occurred more, mainly caused by pesticide hindered the normal photosynthesis of chlorophyll.Weight, according to the adr have yellow or whole plant yellow leaf.Leaves became brown and intentional leaves became brown and yellow 2 kinds.
Such as kill yellow chrysanthemum ester on the watermelon have new tip performance;Wheat by green Cameron slight phytotoxicity, performance based leaves yellow;When wheat by simazine adr, but starting from the edge of blade tip is yellow, and then extended to the whole leaf, leaf or whole plant yellow dies.Against the grass long can make the cotton seedling leaves yellowing type back green symptoms.
3, spot
This kind of the adr mainly on plant leaves, sometimes occur in the stem or the fruit peel.Common medicine has brown spots, macular, mesh spot spot to wait for a few kinds.Such as rice seedling bed early spraying butachlor is undeserved, rice leaf will happen irregular blotches.Use spray jinggangmeisu watermelon seedling leaves, there will be a small macula;The bordeaux mixture on the surface of the apple can produce phellem brown spot of network.
4, deformity
This kind of adr in crop stalk leaf and root are symptoms, common deformities are leaf, cluster, root, deformity, deformity fruit, etc.Such as wheat bud is dimethyl four chlorine adr, show the bud sheath base and young roots swollen;By nitrofen phytotoxicity of cotton seedlings growing point atrophy, cotton leaf curl leaf shaped deformity;Tomato by 24 - D the adr, typical hollow fruit and deformity fruit.
5, stunted growth
This type of adr is suppresses the normal growth of crops, make plant growth.Such as rapeseed improper use green Cameron, growth retardation, branch to reduce, has certain influence on yield;Multi-effect azole used in the late seedling bed, if he does not make processing of transplanting, the pulling of seedling seedling cultivation, makes the seedlings growth is slow, affect the normal earing.
6, infertility
This kind of adr is in crop use drug undeserved and cause reproductive stage.As in the rice before and after the meiosis of pollen mother cell, use green rice feet, can cause male sterility, caused empty batch of green grain of grain production.
7, bad fruit
This kind of the adr mainly on plant fruit, the fruit volume smaller, fruit table is unusual, quality become worse, affect the edible value.Such as watermelon by ethephon phytotoxicity, pulp wine, smell;Tomato by cupric phytotoxicity, can make the fruit surface cell death, formation of brown fruit phenomenon;Grapes be hurt by muti, loose grain, fruit shrink.
8, fall off
This kind of phytotoxicity mostly on fruit trees and some dicotyledons, have fallen leaves, fallen petal.The symptom such as fruit drop.Such as peach by cupric phytotoxicity, can cause deciduous;Pear tree flowering use methamidophos, can cause the fallen petal;Hawthorn using ethephon undeserved, can cause fruit abscission, deciduous;Bordeaux mixture can cause the apple out of fruit;Lime sulfur agent can also cause for apple fruit drop.
