论文部分内容阅读
八十年代以来,在我县沿黄海棉旱粮地区,春季麦圆蜘蛛为害玉米逐年加重。1987年发生面积达622.4公顷,分布于各玉米产区。一、为害状麦圆蜘蛛为害玉米,主要是刺吸叶片汁液。被刺吸叶面处出现褪绿斑点,初害点有虫体大小,继而被害点失水枯白,随着叶面被害点的增加,出现叶片枯死。二、发生规律在我县麦圆蜘蛛为害玉米常年
Since the eighties, in our county along the Yellow Sea cotton riparian areas, the spring wheat spider harm corn increased year by year. In 1987 an area of 622.4 hectares occurred, located in the various maize producing areas. First, the damage-like wheat spider harm corn, thorn sucking leaves juice. Was stabbed sucking leaves appear chlorotic spots, the initial damage point with the size of parasites, then the water loss of withered point of withered, with the increase of the damage point of the leaves, leaves withered. Second, the law occurs in my county Maoyuan spider corn perennial damage