tailieunhanh - Báo cáo khoa học: "Impact of insects damaging seed cones of cypress, Cupressus sempervirens, in natural stands and plantations of southeastern Europe"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: Impact of insects damaging seed cones of cypress, Cupressus sempervirens, in natural stands and plantations of southeastern Europe. | 167 Ann. For. Sci. 56 1999 167-177 Inra Elsevier Paris Original article Impact of insects damaging seed cones of cypress Cupressus sempervirens in natural stands and plantations of southeastern Europe Alain Roquesa Stephanos Markalasb Geraldine Rouxa Yong-zhi Pana Jiang-hua Suna Jean-Paul Raimbaulta a Zoologie Forestiere Inra Ardon 45160 Olivet France b Laboratory of Forest Protection Thessaloniki University Box 228 54006 Thessaloniki Greece Received 15 January 1998 accepted 31 March 1998 Abstract - A total of 18 stands of Cupressus sempervừens L. Cupressaceae were surveyed in the natural Greek range plus one stand in Turkey during 1994-1996 in order to identify the pests of seed cones and assess their impact on seed survival. Naturalised stands of mainland Greece Albania and Malta were sampled for comparison. The cone entomofauna seven insect and one mite species did not differ between the native and introduced ranges of cypress. A tortricid Pseudococcyx tessulatana LepidopteraiTortricidae and a mite Trisetacus juniperinus AcariiNalepellidae were the most damaging pests because they usually killed cones during the growth period. A more intensive survey of damage together with cone development in four Greek stands showed that only 11-37 of the initial cones survived until maturity. The seed crop decreased by 78-95 . Pests predominantly tortricid larvae mites and Orsillus seed bugs Hemiptera Lygaeidae were responsible for 41-84 of that decrease according to the stand. Inra Elsevier Paris. Cupressus sempervirens I insect pests cone seed Greece Resume - Impact des ravageurs des cones et graines de cypres Cupressus sempervirens dans des peuplements naturels et plantations du sud-est de 1 Europe. Un total de 18 peuplements de Cupressus sempervirens L. Cupressaceae ont été échantillon-nés en 1994 1995 dans Taire naturelie grecque plus un peuplement en Turquie de 1 essence en vue d identifier les ravageurs des cones et graines et estimer leur impact sur la survie des .