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2,4——滴丁酯防除麦田杂草是一种简便易行、有效的方法,是争取小麦丰产的重要措施。但不少社队在使用过程中,由于药量不准、打药偏早或偏熟以及打药技术等原因,不同程度地造成了药害,影响产量。为进一步掌握这一药剂的特性,明确施药适期,去年我们在城郊公社蔡桥大队作了不同时期施药的药效、药害观察。试验在一块生长整齐、杂草危害较轻的墨卡小麦田作小区对比,分三叶期、分蘖期、拔节期、孕穗期四个不同时期施药,以不施药为对照,每处理10平方米,重复两次。用药量按市售72％2,4——滴丁酯8钱兑水30斤,用工农16型喷雾器喷施,试验结果如下表:
2,4 - Dibutyl control of weeds in wheat fields is a simple and effective method is an important measure for wheat yield. However, many commune teams in the course of their use, due to inaccurate doses, premature or premature drug fight and fight drug technology and other reasons, to varying degrees, causing injury, affecting output. In order to further grasp the characteristics of this medicine and to clarify the proper period of drug application, last year we conducted the efficacy and injury observation of pesticide application in different periods in Caiqiao Brigade of the Outskirts Commune. Experiments in a neat, weed less harmful to the wheat field for residential comparison, divided into three-leaf stage, tillering stage, jointing stage, booting stage in four different periods of application, with no application of control, each treatment 10 Square meter, repeated twice. Dosage 72% 2,4-D on the market - drip eight money watered 30 kg, spraying with a worker-peasant type 16 sprayer, the test results are as follows: