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检查药剂防治玉米螟的效果,最可靠的方法是“剖秆检查”。即用不同药剂处理被害株,经过一定时间,将供试植株齐地面割下,剖秆检查。检查心叶期的植株,一般可先在心叶最下面的一张叶片(指宽大的叶片,不是靠近地面的)的叶鞘处用小刀截断,就能将叶片逐一展开,进行仔细的检查;然后再剖查茎秆部分。检查穗期的植株,一般先摘下雌穗,剥去苞叶进行检查;其次将叶片逐一拆除,检查叶鞘和茎秆交接处;最后再剖查茎秆。根据不同试验目的,具体记载方法可分以下两类:
Check the effect of chemical control corn borer, the most reliable method is “cut stalks check.” That is, using different agents to deal with the victim strain, after a certain period of time, the test plant cut off the ground together, cut stalks check. Check the leaf stage of the plant, the general can be the first heart leaf at the bottom of a leaf (referring to the large leaves, not near the ground) at the leaf sheath cut off with a knife, you can expand the leaves one by one, for careful examination; Check the stalk section. Check the plants at the ear stage, usually first off the ear, stripped bracts to check; followed by the removal of leaves one by one, check the leaf sheath and stem junction; and finally check the stalk. Depending on the purpose of the test, the specific methods can be divided into the following two categories: