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首页> 外文期刊>Cotton Reseach Journal >Cotton Leaf Reddening-Systematic Damage Caused by Use of Methomyi in Cotton
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Cotton Leaf Reddening-Systematic Damage Caused by Use of Methomyi in Cotton

机译：棉花使用甲基霉菌引起的棉花叶片变红系统性损伤

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摘要

Methomyi (S-methyl-N-[(methylcarbamoyl)oxy}-thioacetimidate) is a broad spectrum carbamate insecticide and nematicide and is extensively used as foliar spray in cotton. Methomyi has an ovicidal action and is recommended at 300-400g a.i./ha to controlbollworm in cotton. This study reports the effect of foliar application of three commercially available methomyi formulations against six popular cotton hybrids. The foliar application of insecticides irrespective of the formulations at the recommended dose (0.2gL ') led to reddening of whole plant within 24-48 hours in all the hybrids tested. The photosynthetic apparatus was damaged as indicated by reduction in chlorophyll content (20-28%) and concomitant increase in anthocyanin content (60%). The major biochemical constituents showed a decline with the application of insecticide viz., reducing sugar (36%), amino acid (20%), proline (24%) and protein (14%) respectively. This is the first report to demonstrate that methomyi damages adaxial leaf by damaging the stomatal guardcells, mesophyll cells and entering into the veins. Methomyi movement can be tracked by trail of anthocynin left behind and that finally leading to death of cells. Even though there were reports on damage of membrane permeabihty, leakage of electrolytes and reddening of leaves, this is the first confirmed report of cellular damage caused by methomyi application through studies on mesophyll cells.
机译：甲菌素（S-甲基-N-[（甲基氨基甲酰基）氧基}-硫代乙酰胺酸酯）是广谱的氨基甲酸酯杀虫剂和杀线虫剂，被广泛用作棉花的叶面喷雾剂。 Methomyi具有杀虫作用，建议以300-400g a.i./ha./ha的剂量防治棉铃虫。这项研究报告了叶面喷施三种可商购的灭多威制剂对六种流行的棉杂种的影响。不管推荐剂量（0.2gL'）的配制剂如何，叶面施用杀虫剂都会导致所测试的所有杂种在24-48小时内使整个植物变红。叶绿素含量减少（20％至28％）和花青素含量随之增加（60％）表明，光合作用装置受到损坏。随着杀虫剂的使用，主要生化成分呈下降趋势，分别降低了糖（36％），氨基酸（20％），脯氨酸（24％）和蛋白质（14％）。这是第一个证明灭多威通过破坏气孔保卫细胞，叶肉细胞并进入静脉而破坏叶片背面的报告。可以通过残留的花青素的踪迹来追踪甲硫磷的运动，并最终导致细胞死亡。即使有膜通透性受损，电解质渗漏和叶片变红的报道，这也是通过对叶肉细胞的研究首次证实了灭多威对细胞造成损害的报道。

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