بررسی جمع آوری و شناسایی حشرات طبیعی آنها در جنگلها و جنگلکاریهای بلوط استان گیلان

Guilan forests with 565000 hec. is about one theird of Iran northern forests . This forests because of precipitation and high humidity , has a special plant divercity , so that about 50 species have been and beech , oak , maple , alder , hornbeem , elm , cherry are considered as the most important species of Guilan forests . Oak species of Guilan are Quercus castaneifolia , Q.macranthera and Q.petraea . Different species of insects (Insecta) cause growth rudeness and induce galls on different organs (leaf , stem , fruit and root) of this beneficial species . There is a consierable amount of in some galls , and for this reason , they are favored by villagers in margin of forests and are used in different perposes . Due to importance of oak gallinducing insects , their biological variation were very important in north of Iran . This study was conducted in arried on 9 regions (natural stands and afforestation of oak) in west , center , south and east of Guilan province in north of Iran , during 2004 2006 . In this research , all of oak gall-inducing insects were collected regularly each 15 days during the growth season from different organs of oak trees , and then transferred to laboratory . Then they wrer identified on the basis of gall morphology and external morphology of insects . In this study , 11 gall samples , 11 species of oak gall-inducing wasps (5 species on Q. castaneifolia , 4 species on Q.macranthera and 2 species on Q.petraea) 4 species of parasitoid wasps and 3 species of inquiline wasps were collected on 3 species of oak trees . Key word : oak., gall inducing wasps , forest , afforestation , Iran , Guilan province

کلیدواژه ها:

حشرات مسبب گال ، گیلان ، بارندگی ، رطوبت ، راشیان ، کارپینوس ، گیلاس ها ، کوارکوس