Thieron M, Kerres W, Schäffer A
ARGUS monitoring, Langweiler Str. 17, DE-52477 Alsdorf, Germany.
Commun Agric Appl Biol Sci. 2007;72(2):247-55.
A new strategy combining modem hoeing technique and spray application has been developed in order to reduce the amount of herbicides down to 20% compared to common practice. The effects on weed control have been investigated as well as the impact on qualitative and quantitative harvest. In two large scale field trials and two years of testing the authors evaluated different hoeing techniques combined with band spray application and standard spray application, the minimal lethal herbicide dose method (MLHD). All varieties have been calculated for environmental impact as well as practical and economical means. These studies reveal crop losses due to improper weed control as well as losses due to herbicide stress. Detailed information on concentration depending impact of several herbicides have been correlated to their control of different weeds and the achieved yield. Two contrary effects influencing the total yield have been identified. The novel strategy is based on the knowledge of these complex effects which finally led to a well practicable and highly economic strategy that enables onion farmers to control weeds while reducing the amounts of herbicides down to approximately 20%.
为了将除草剂用量比常规做法减少至20%，已开发出一种结合现代锄草技术和喷雾施用的新策略。研究了其对杂草控制的效果以及对定性和定量收获的影响。在两项大规模田间试验和两年的测试中，作者评估了不同的锄草技术与带状喷雾施用和标准喷雾施用（即最小致死除草剂剂量法，MLHD）相结合的情况。对所有品种都从环境影响以及实际和经济角度进行了计算。这些研究揭示了因杂草控制不当导致的作物损失以及因除草剂胁迫造成的损失。关于几种除草剂浓度依赖性影响的详细信息已与它们对不同杂草的控制及所实现的产量相关联。已确定了影响总产量的两种相反效应。这种新策略基于对这些复杂效应的了解，最终形成了一种切实可行且高度经济的策略，使洋葱种植者能够在将除草剂用量减少至约20%的同时控制杂草。
