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柑桔爆皮虫为我国主要柑桔产区的重要害虫,发生已久。在浙江衢县是柑桔上的一种毁灭性害虫,对柑桔生产的影响很大。本文系1958—1960年在浙江衢县桔区結果此虫生活习性和防治的研究。 1.此虫在衢县对衢桔为害最重,广柑、香枹(柚之一种)次之,福桔和有柑为害最輕。一年发生一代,主要以第2—4龄幼虫在树干不同部位越冬,尤以木质部內的第4龄幼虫越冬为主。3月下旬开始化蛹,4月下旬化蛹盛期,同时成虫开始羽化,5月上旬羽化盛期,5月中旬成虫出洞,5月下旬为出洞盛期,以后一直延續到10月间陆續有成虫羽化出洞,但为数不多。 2.成虫产卵有选择性,在已受害的桔树上产卵多,并都在这些桔树树皮的小裂縫內产卵,在地衣、苔蘚內較少。 3.爆皮虫为害桔树主要在幼虫时期,其为害的发展趋势:一是在虫株上从下向上发展,这是主要的;二是横的发展,在同株內从虫干向邻近健干扩散或从被害株向邻近健株扩散,同园内不同桔株是从园边扩散到中間。 4.幼虫有4个龄期,第1—3龄幼虫在韌皮部与形成层内为害,第4龄幼虫在形成层及木质部內为害。 5.用10％二二三乳剂涂刷被害桔树,封閉成虫出洞的效果极好,同时它的残效长,对桔树无药害,是安全有效的防治方法。
Citrus detritivore is an important pest of the main citrus producing areas in our country, and it has been occurring for a long time. Qu county in Zhejiang is a devastating insect on citrus, a great impact on citrus production. This article is from 1958 to 1960 in Qujiang County, Zhejiang Province, the results of the pest habits and control research. 1. This insect in Qu County Quchuang most harmful, Kwong Kwan, Hong Kong (one of the pomelo) followed, bilberry and citrus damage the lightest. One generation a year, mainly in 2-4th instar larvae wintering in different parts of the trunk, especially in the xylem 4th instar larvae overwinter. In late March pupation began in late April pupation flourishing period, at the same time the adult began to emerge, early May feathering peak, mid-May adult wormhole, late May for the hole peak period, until after the October One after another emergence of adult emergence hole, but one of the few. 2. Adult ovipositing is selective, spawning more eggs in the already damaged orange trees and spawning in small cracks in these orange tree barks, with less in lichens and moss. 3. Eggplant pest damage Orange trees mainly in the larvae period, the development trend of harm: First, the strain from the bottom up development, which is the main; Second, the horizontal development in the same strain from the worm to the neighboring health Diffusion of dry or spread from the victim to neighboring healthy plants, with different orange plants in the garden is spread from the garden to the middle. 4 larvae have 4 instars, 1-3 instar larvae in the phloem and formation of layer damage, 4th instar larvae in the formation and xylem damage. 5. With 10% Er’san emulsion brushing the victim orange tree, closed the worm out of the hole is extremely effective, while its long residual effect, no harm to orange trees, is a safe and effective method of prevention and treatment.