Bandyopadhyay Subhendu, Choudhury Partha P
Department of Agronomy, Uttar Banga Krishi Viswabidhyalaya, Pundibari-736165, Coochbehar, West Bengal, India.
Interdiscip Toxicol. 2009 Dec;2(4):250-3. doi: 10.2478/v10102-009-0025-z. Epub 2009 Dec 28.
An experiment was conducted at the farm of Zonal Adaptive Research Station, Uttar Banga Krishi Viswavidhyalaya, Pundibari, Cooch Behar, West Bengal to evaluate the effect of pendimethalin on the yield, weed density and phytotoxicity in different varieties of rai (Brassica juncea) and yellow sarson (B. campestris var. yellow sarson) under higher soil moisture regime in Terai region of West Bengal. Pre-emergence application of pendimethalin at higher dose i.e. 1.0 kg/ha recorded higher plant mortality (30.92%) due to the presence of higher concentration of pendimethalin residue (0.292 µg/g) till the tenth day of crop age and consequently had the reduced yield (12.59 q/ha) than the dose of 0.7 kg/ha (13.33 q/ha) where plant mortality was only 12.62% due to comparatively lower level of pendimethalin residue (0.192 µg/g). Although the application of pendimethalin at the rate of 1.0 kg/ha was able to control weed more efficiently (18.96/m(2)) than the dose of 0.7 kg/ha (30.41/m(2)) and subsequent lower doses. The herbicide leached down to the root zone resulting in phytotoxicity towards crop. Yellow sarson group (Brassica campestris) showed more susceptibility than rai (Brassica juncea) group against pendimethalin application at higher doses.
在西孟加拉邦库奇比哈尔县蓬迪巴里的北邦加农业大学分区适应性研究站农场进行了一项实验，以评估在西孟加拉邦特莱地区较高土壤湿度条件下，二甲戊灵对不同品种油菜（芥菜）和黄芥（油菜变种黄芥）的产量、杂草密度和植物毒性的影响。在作物生长至第十天时，较高剂量即1.0千克/公顷的二甲戊灵芽前施用记录到较高的植株死亡率（30.92%），这是由于二甲戊灵残留浓度较高（0.292微克/克），因此产量（12.59公担/公顷）低于0.7千克/公顷剂量（13.33公担/公顷），后者因二甲戊灵残留水平相对较低（0.192微克/克），植株死亡率仅为12.62%。尽管1.0千克/公顷剂量的二甲戊灵比0.7千克/公顷剂量及后续较低剂量更能有效控制杂草（18.96株/平方米）。除草剂向下淋溶到根区，导致对作物产生植物毒性。在较高剂量的二甲戊灵施用下，黄芥组（油菜）比油菜组（芥菜）表现出更高敏感性。
