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症状由于农药使用剂量不当或施药时间和方法不当,农药中的化学物质渗入植物体后,引起植物新陈代谢发生变化,生长发育受到抑制,外部形态出现畸形。如除草剂2。4-D、百草敌等施用时,特别是2,4-D挥发性强,漂移现象严重,往往使麦株受害。同时小麦在幼穗分化期,对农药敏感性增强。因此,易出现叶片扭曲,穗不能正常抽出,或抽出畸形德、小穗等现象。空气污染是由于污染源排放了对植物有害气体,如二氧化硫、氟化氢等毒气。一般在砖窑附近植物易于发生二氧化硫毒气伤害,并常随风向成片发生。叶上初现水浸状不规则形斑块,
Symptoms due to improper use of pesticides or spraying time and improper methods, chemicals in pesticides into the plant, causing changes in plant metabolism, growth and development was inhibited, the external morphology deformity. Such as herbicides 2.4-D, paraquat enemies and other applications, especially 2,4-D volatile strong, severe drift, tend to wheat plant damage. At the same time, wheat is sensitive to pesticides during the panicle differentiation period. Therefore, prone to leaf distortion, the ear can not be normal extraction, or out deformity Germany, spikelet and so on. Air pollution is due to pollution sources emit harmful gases to plants, such as sulfur dioxide, hydrogen fluoride and other gases. Plants are generally prone to sulfur dioxide poisoning in the vicinity of the brick kilns, and often occur as a result of the wind becoming a hit. Leaves appear on the water-like irregular shaped patches,