caa a22 4500 39757178X CHVBK 20180308164843.0 cr unu---uuuuu 161202e19960201xx s 000 0 eng 10.1093/ee/25.1.39 doi (NATIONALLICENCE)oxford-10.1093/ee/25.1.39 Impact of Cruciferous Trap Crops on Lepidopteran Pests of Cabbage in Hawaii [Elektronische Daten] [Gregory C. Luther, Hector R. Valenzuela, Joseph Defrank] The objective of this study was to determine if trap crops of Indian mustard, Brassica juncea (L.) Czern., and ‘Tastie' head cabbage, Brassica oleracea variety capitata L., grown alongside a main crop of ‘Scorpio' head cabbage would significantly reduce lepidopteran pest numbers and improve yields on the main crop. For the 2 most economically important lepidopteran pests in the trials, diamondback moth, Plutella xylostella (L.), and imported cabbageworm, Pieris rapae (L.), significantly higher numbers were found on trap-cropped Scorpio than on monoculture Scorpio for certain key sampling dates. Numbers of Plutella xylostella were higher on the trap crops than on trap-cropped Scorpio for certain key dates. It appears that Indian mustard and Tastie cabbage acted effectively as attractants, but through an undetermined mechanism contamination of the adjacent Scorpio crop occurred. There were no significant differences in yield or marketability between monoculture Scorpio and trap-cropped Scorpio. Various changes in agroecosystem management might allow the attractiveness of the trap crops to be used in a beneficial manner. Indian mustard and Tastie cabbage show potential for use as trap crops for Hellula undalis (F.), cabbage looper, Trichoplusia ni (Hübner), and green garden looper, Chrysodeixis eriosoma (Doubleday). An understanding of the mechanisms that explain the movement of Lepidoptera within vegetationally diverse agroecosystems would be useful for on-farm implementation of this technique. Problems inherent in field experiments that compare the effects of different cropping systems on mobile insect populations are also discussed. © 1996 Entomological Society of America Population Ecology nationallicence Plutella xylostella nationallicence trap crop nationallicence Cruciferae nationallicence Luther Gregory C. Department of Horticulture, University of Hawaii at Manoa, 3190 Maile Way, Honolulu, HI 96822-2279 aut Valenzuela Hector R. Department of Horticulture, University of Hawaii at Manoa, 3190 Maile Way, Honolulu, HI 96822-2279 aut Defrank Joseph Department of Horticulture, University of Hawaii at Manoa, 3190 Maile Way, Honolulu, HI 96822-2279 aut Environmental Entomology Oxford University Press 25/1(1996-02-01), 39-47 0046-225X 25:1<39 1996 25 ee https://doi.org/10.1093/ee/25.1.39 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/ee/25.1.39 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Luther Gregory C. Department of Horticulture, University of Hawaii at Manoa, 3190 Maile Way, Honolulu, HI 96822-2279 aut NATIONALLICENCE 700 1- Valenzuela Hector R. Department of Horticulture, University of Hawaii at Manoa, 3190 Maile Way, Honolulu, HI 96822-2279 aut NATIONALLICENCE 700 1- Defrank Joseph Department of Horticulture, University of Hawaii at Manoa, 3190 Maile Way, Honolulu, HI 96822-2279 aut NATIONALLICENCE 773 0- Environmental Entomology Oxford University Press 25/1(1996-02-01), 39-47 0046-225X 25:1<39 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