一、生长素除草剂 在Jealotts Hiss的ICI研究站以NAA溶液喷燕麦作物来进行生长素对土壤中有机物质影响的研究。这个试验发现,燕麦植株未受伤害,芥菜幼苗则被杀死。这个试验结果导致了化学合成生长素作为控制谷类作物田间阔叶杂草选择性杀草剂的发展。它们不仅能够抑制对生长素敏感的根系的生长,而巳能杂乱地影响组织分化,分裂和伸长的过程,从而使敏感的植物发生极度的畸形。 First, auxin herbicides at the ICI Research Station in Jealotts Hiss NAA solution sprayed oat crops for the study of the effect of auxin on soil organic matter. This experiment found that oat plants were unharmed and mustard seedlings were killed. The results of this experiment led to the development of chemically synthesized auxin as a selective herbicide for controlling broad-leaved weeds in the field of cereal crops. Not only do they inhibit the growth of auxin-sensitive roots, they can mess up the processes of tissue differentiation, division and elongation, causing extreme deformities in sensitive plants.