摘要
在福建省洋口林场杉木种子园中常见的害虫有２６种，隶属７目２０科。其中杉木球果麦蛾、杉木扁长蝽和杉梢小卷蛾是影响良种产量的主要害虫。杉木球果麦蛾是中国新记录种，以幼虫危害球果的苞鳞、果轴及种子，使球果变色、干枯。杉木扁长蝽的危害及炭疽菌和散斑壳菌的侵染导致球果变色。１０月受害果率达３７．２％。测定结果表明，球果虫害及变色明显影响每百球果的鲜果重、种子重、千粒重及出籽率（平均下降２６．９％—７３．７％），但对种子的发芽率及涩籽率无显著影响，并提出以摘尽球果为主的综合治理措施。
In Chinese fir(Cunninghamia
lanceoiata)seed orchards on Yangkou Forest Farm of Fujian Province there are 26 species of
common injurious insects subordinate to 7 orders 20 fami-lies. of which Dichomoris
sp.Sinorsillus piliforus and Polychrosis cunninghamiacola are the main injurious inxects
affecting fine variety yield. Dichomoris sp.is a new record species in China whose larvae harm
the bract,cales,fruit axes and seeds of cones to make cones change their colour and dry. The
harm of S. piliforus and the infection of Gloosporium sp. and Lophodermium sp. cause cones to
change their colour, The affected cone rate reaches 37.2%in October. Determination re- sults
demonstrate that the cone insect harm and cone colour change evldently influence the fresh
cone weight.seed welght. thousand-seed weight and seed-producing rate(reducing 26.9-73.7%
on the average) per hundred cones,but have no significant effect on seed germination rate and
un-developed seed rate. Some comprehensive harnessing measures taking picking all cones
as the dom-inant factor are put forward.
出处
《福建林业科技》
1994年第3期76-80,共5页
Journal of Fujian Forestry Science and Technology
关键词
杉木
种子园
球果表蛾
害虫
防治
Chinese fir seed orchards:cone insect
harm:Dichomoris sp.
