TY - JOUR
T1 - Strawberry resistance to Tetranychus urticae Koch
T2 - Effects of flower, fruit, and foliage removal-comparisons of air- vs. nitrogen-entrained volatile compounds
AU - Hamilton-Kemp, T. R.
AU - Rodriguez, J. G.
AU - Archbold, D. D.
AU - Andersen, R. A.
AU - Loughrin, J. H.
AU - Patterson, G. G.
AU - Lowry, S. R.
PY - 1989/5
Y1 - 1989/5
N2 - An increase in resistance to the two-spotted spider mite (TSSM), Tetranychus urticae Koch, is observed in field-grown strawberry plants during the period from flowering to postharvest. This seasonal phenomenon was investigated to determine the influence of the metabolic sink, that is, fruiting in the plant. Removal of flowers and fruit and partial removal of foliage did not alter the pattern of resistance of the strawberry plant to TSSM. Bioassays were conducted in concert with chemical analyses. Headspace chemicals emitted from foliage samples were entrained in air and trapped on Tenax, identified, and compared with those entrained in nitrogen and trapped. Terpenes were among the major compounds entrained in air, whereas alcohols were obtained with nitrogen. The air-entrained headspace compounds did not appear to correlate quantitatively with the development of mite resistance in the control plants or those subjected to metabolic sink (flower and fruit) removal. Evidence was obtained for the presence of heretofore unreported strawberry foliage headspace components, namely, (Z)-3-hexenyl 2-meth-ylbutyrate, (Z)-3-hexenyl tiglate, (E)-β-ocimene, (Z)-β-ocimene, α-farnesene, and germacrene D.
AB - An increase in resistance to the two-spotted spider mite (TSSM), Tetranychus urticae Koch, is observed in field-grown strawberry plants during the period from flowering to postharvest. This seasonal phenomenon was investigated to determine the influence of the metabolic sink, that is, fruiting in the plant. Removal of flowers and fruit and partial removal of foliage did not alter the pattern of resistance of the strawberry plant to TSSM. Bioassays were conducted in concert with chemical analyses. Headspace chemicals emitted from foliage samples were entrained in air and trapped on Tenax, identified, and compared with those entrained in nitrogen and trapped. Terpenes were among the major compounds entrained in air, whereas alcohols were obtained with nitrogen. The air-entrained headspace compounds did not appear to correlate quantitatively with the development of mite resistance in the control plants or those subjected to metabolic sink (flower and fruit) removal. Evidence was obtained for the presence of heretofore unreported strawberry foliage headspace components, namely, (Z)-3-hexenyl 2-meth-ylbutyrate, (Z)-3-hexenyl tiglate, (E)-β-ocimene, (Z)-β-ocimene, α-farnesene, and germacrene D.
KW - Acari
KW - Tetranychidae
KW - Tetranychus urticae
KW - headspace entrainment
KW - metabolic sink removal
KW - strawberry resistance
KW - two-spotted spider mite
KW - volatile foliage compounds
UR - http://www.scopus.com/inward/record.url?scp=0009346455&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0009346455&partnerID=8YFLogxK
U2 - 10.1007/BF01012376
DO - 10.1007/BF01012376
M3 - Article
C2 - 24272091
AN - SCOPUS:0009346455
SN - 0098-0331
VL - 15
SP - 1465
EP - 1473
JO - Journal of Chemical Ecology
JF - Journal of Chemical Ecology
IS - 5
ER -