论文部分内容阅读
吹绵蚧为庭院、花圃多种木本观赏花卉的一种常见害虫,月季、黄杨受害较重。吹绵蚧在许昌市一年发生2代,以受精雌成虫越冬。雌成虫与若虫分散固定于花木叶片或嫩枝上,吸取汁液,危害花木。危害期从3月下旬到9月下旬,严重时使叶、梢枯萎,甚至整株枯死。根据在全市56个庭院和11个苗圃调查590株月季、631株黄杨,月季盆栽和片植被害株率为46.3%和76.5%;黄杨的单株栽植和片植被害株率为51.2%和81.3%。而在海桐、佛手、桂花和茶花上为害较轻。为防治吹绵蚧危害,1986—1987年夏季,
Blown cotton wool for the garden, flower garden a variety of woody ornamental flowers of a common pests, rosewood, boxwood victims heavier. Mian Kuwana occurred in Xuchang City, one generation a year to female winter insemination. Female adults and nymphs scattered fixed in the flowers and leaves or shoots, draw juice, endangering flowers. Hazard period from late March to late September, when severe leaves, shoots wilt, and even the entire dead. According to the surveys of 590 rose seasons in 56 courtyards and 11 nurseries in the city, 631 strains of poplars and potted plants were planted in 46.1% and 76.5% %. In the Pittosporum, bergamot, sweet-scented osmanthus and Camellia harm less. In order to prevent the harm of blowing mealybugs, the summer of 1986-1987,