caa a22 4500 397570880 CHVBK 20180308164841.0 cr unu---uuuuu 161202e19960401xx s 000 0 eng 10.1093/ee/25.2.350 doi (NATIONALLICENCE)oxford-10.1093/ee/25.2.350 Emergence of Pear Thrips (Thysanoptera: Thripidae) and its Relation to Foliar Damage [Elektronische Daten] [Margaret Skinner, Bruce L. Parker] Adult emergence of pear thrips, Taeniothrips inconsequens (Uzel), from soil in forests predominating in sugar maple, Acer saccharum Marshall, was monitored, using 7.6- cm-diameter traps, at sites in north central, northeastern, central and southwestern Vermont from 1989 to 1991. The onset of emergence ranged from 2 April to 15 May, but generally occurred in mid-April in all regions. We measured the number of thrips in soil in September and how many emerged in the spring, and monitored the timing and rate of emergence to determine if damage could be predicted from these factors. Thrips density in the soil was not consistently correlated with damage, making it an unreliable predictive measure. A correlation between thrips damage and the timing or duration of emergence was also not detected. The number of thrips per emergence trap was positively correlated with damage in all study years, and from this correlation the predicted number of thrips per trap for moderate damage to occur was 18 in 1989, 13 in 1990 and 8 in 1991. Annual fluctuations in the threshold number of thrips required for damage could limit the use of thrips emergence data for predictive purposes. © 1996 Entomological Society of America Population Ecology nationallicence pear thrips nationallicence Thysanoptera nationallicence Acer saccharum nationallicence adult emergence nationallicence survey methods nationallicence forests nationallicence Skinner Margaret University of Vermont, Entomology Research Laboratory, P.O. Box 53400, Burlington, VT 05405-3400 aut Parker Bruce L. University of Vermont, Entomology Research Laboratory, P.O. Box 53400, Burlington, VT 05405-3400 aut Environmental Entomology Oxford University Press 25/2(1996-04-01), 350-358 0046-225X 25:2<350 1996 25 ee https://doi.org/10.1093/ee/25.2.350 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/ee/25.2.350 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Skinner Margaret University of Vermont, Entomology Research Laboratory, P.O. Box 53400, Burlington, VT 05405-3400 aut NATIONALLICENCE 700 1- Parker Bruce L. University of Vermont, Entomology Research Laboratory, P.O. Box 53400, Burlington, VT 05405-3400 aut NATIONALLICENCE 773 0- Environmental Entomology Oxford University Press 25/2(1996-04-01), 350-358 0046-225X 25:2<350 1996 25 ee Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford