caa a22 4500 39757200X CHVBK 20180308164844.0 cr unu---uuuuu 161202e19960801xx s 000 0 eng 10.1093/ee/25.4.749 doi (NATIONALLICENCE)oxford-10.1093/ee/25.4.749 Field Performance of F1-Sterile Gypsy Moth Larvae (Lepidoptera: Lymantriidae) on Loblolly Pine and Sweetgum [Elektronische Daten] [Brian L. Strom, Fred P. Hain, Matthew P. Ayres] The quality of sweetgum, Liquidambar styraciflua L., and loblolly pine, Pinus taeda L., as a foodsource for gypsy moth, Lymantria dispar (L.), larvae was evaluated using caged F1-sterile gypsy moths in a field study in southeastern Virginia. A 1st experiment compared host species at 3 sites. Because early instars do not feed on loblolly pine, 2nd and 3rd stadia larvae were caged only on sweetgum, and allocated to sweetgum and loblolly pine at the onset of the 4th stadium. On sweetgum, survival of L2 and L3 gypsy moths was 32% across sites and was ≈17% higher on the best site compared with the worst. Survivalof L4 to pupae was not affected by site, but survival was significantly higher on sweetgum than loblolly pine during this period. Host species did not affect duration of the larval stage, pupal weight, duration of the pupal stage, or development time to adult of F1-sterile gypsy moths; however, site had a significant effect on duration of the larval period. A 2nd experiment using L4-L6 examined the effects of detaching branches, on both host species, on the duration of the larval period, relative growth rate, and pupal weight. The main effects of host species, branch detachment, and frequency of larval handling (frequent versus infrequent) were not significant for any response variable. The interactions of branch detachment by host species and larval handling by host species were significant. On loblolly pine, larvae caged on detached branches developed more slowly than those on intact branches, but those larvae caged on intact branches and moved infrequently developed the slowest of any treatment. Larvae on sweetgum were unaffected by branch detachment or frequency of handling. © 1996 Entomological Society of America Population Ecology nationallicence Lymantria dispar nationallicence Pinus taeda nationallicence Liquidambar nationallicence host switching nationallicence Strom Brian L. Departments of Entomology and Forestry, North Carolina State University, Raleigh, NC 27695 aut Hain Fred P. Departments of Entomology and Forestry, North Carolina State University, Raleigh, NC 27695 aut Ayres Matthew P. Departments of Entomology and Forestry, North Carolina State University, Raleigh, NC 27695 aut Environmental Entomology Oxford University Press 25/4(1996-08-01), 749-756 0046-225X 25:4<749 1996 25 ee https://doi.org/10.1093/ee/25.4.749 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/ee/25.4.749 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Strom Brian L. Departments of Entomology and Forestry, North Carolina State University, Raleigh, NC 27695 aut NATIONALLICENCE 700 1- Hain Fred P. Departments of Entomology and Forestry, North Carolina State University, Raleigh, NC 27695 aut NATIONALLICENCE 700 1- Ayres Matthew P. Departments of Entomology and Forestry, North Carolina State University, Raleigh, NC 27695 aut NATIONALLICENCE 773 0- Environmental Entomology Oxford University Press 25/4(1996-08-01), 749-756 0046-225X 25:4<749 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