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蚜虫是桃树发生最早的害虫,在营山县,3月中旬开始为害,初夏进入发生盛期,为害最烈。成蚜和若蚜群集嫩梢、桃叶背面吮吸汁液,被害新梢生长滞缓,叶片扭卷成团,污斑点点,桃树生长势减弱,严重影响花芽分化,桃果产量下降。为了确保桃果产量,及时防治蚜虫是一项重要措施。目前已初步查明,营山县桃树上发生的蚜虫主要有桃粉蚜、桃蚜、桃瘤蚜,它们的为害状与发生特点比较如下: 在桃树上发生的三种蚜虫,发生规律大致相同,每
Aphids peach tree is the earliest pests occurred in Yingshan County, mid-March began to damage, early summer entered the peak, the worst damage. Aphid and aphid clustered shoots, the back of peaches sucking juice, the growth of stagnant shoots stagnation, leaves twisted into groups, little stain, peach growth potential weakened, affecting the flower bud differentiation, peach yield decline. In order to ensure peach fruit production, timely prevention and control of aphids is an important measure. At present, it has been initially identified that there are mainly peach aphids, peach aphids and peach aphids occurring in peach trees in Ying Shan County. Their pest damage and occurrence characteristics are as follows: The three kinds of aphids that occur on peach trees occur regularly Roughly the same, each