caa a22 4500 386361207 CHVBK 20180307111916.0 cr unu---uuuuu 161130e198908 xx s 000 0 eng 10.4039/Ent121699-8 doi S0008347X00031916 pii (NATIONALLICENCE)cambridge-10.4039/Ent121699-8 Shea Patrick J. Pacific Southwest Forest and Range Experiment Station, Forest Service, U.S. Department of Agriculture, Berkeley, California, USA 94701 PHYTOPHAGOUS INSECT COMPLEX ASSOCIATED WITH CONES OF WHITE FIR, ABIES CONCOLOR (GORD. AND GLEND.) LINDL., AND ITS IMPACT ON SEED PRODUCTION [Elektronische Daten] [Patrick J. Shea] White fir cones were sampled for insect damage from wild stands in California and Nevada during 1984-1986. Insects were recovered from cones and seed damage was partitioned by insect species. The important phytophagous insects were separated into guilds: the cone- and seed-mining guild, Dioryctria abietivorella Groté, Eucosma prob. siskiyouana (Kearfoot), Cydia prob. bracteatana (Fernald), Barbara sp.; the seed-feeding guild, Megastigmus pinus Parfitt, M. rafni Hoffmeyer, Earomyia abietum McAlpine; and the scale- and bract-feeding guild, Asynapta hopkinsi Felt, Dasineura prob. abiesemia Foote, Resseliella conicola (Foote), Strobilomyia abietis (Huckett). Total damage by insects varied by year and site, reaching a maximum of 47% in 1986 on one site and a minimum of 12.5% in 1984 on another. Abortion and incomplete development also were major factors in the production of sound seed. Populations of white fir cone and seed insects varied with cone crop but also were affected by the occurrence of cone crops on alternate hosts. During most years, the seed-mining guild insects were the major cause of seed damage. Copyright © Entomological Society of Canada 1989 The Canadian Entomologist Cambridge University Press 121/8(1989-08), 699-708 0008-347X 121:8<699 1989 121 TCE https://doi.org/10.4039/Ent121699-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.4039/Ent121699-8 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Shea Patrick J. Pacific Southwest Forest and Range Experiment Station, Forest Service, U.S. Department of Agriculture, Berkeley, California, USA 94701 NATIONALLICENCE 773 0- The Canadian Entomologist Cambridge University Press 121/8(1989-08), 699-708 0008-347X 121:8<699 1989 121 TCE CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge