TY - JOUR
T1 - Dwarf phenotype of the cotton aphid, Aphis gossypii glover (Hemiptera: Aphididae)
AU - Watt, Michael
AU - Hales, Dinah F.
PY - 1996/5
Y1 - 1996/5
N2 - The cotton aphid, Aphis gossypii Glover, is a polyphagous aphid that is a pest on a wide range of commercially important crops. It sometimes gives birth to small yellow offspring that grow to be only about 1/2 to 1/3 of the typical adult weight. These "yellow dwarfs" differ from the typical form in their small size, by having 5 instead of 6 antennal segments, and by never attaining dark green/black coloration; they are considered to be a separate developmentally-programmed morph. A morphometric description of the yellow dwarf form is provided. Yellow dwarfs develop at a slower rate than typical aphids and have a lower intrinsic rate of increase. An orthogonal experiment demonstrated that production of yellow dwarfs can be induced by presumed less-suitable host-plant species at temperatures of 15° and 25°, but not 20°C. Crowding may also induce birth of yellow dwarfs. Possible advantages of the yellow dwarf developmental pathway are discussed.
AB - The cotton aphid, Aphis gossypii Glover, is a polyphagous aphid that is a pest on a wide range of commercially important crops. It sometimes gives birth to small yellow offspring that grow to be only about 1/2 to 1/3 of the typical adult weight. These "yellow dwarfs" differ from the typical form in their small size, by having 5 instead of 6 antennal segments, and by never attaining dark green/black coloration; they are considered to be a separate developmentally-programmed morph. A morphometric description of the yellow dwarf form is provided. Yellow dwarfs develop at a slower rate than typical aphids and have a lower intrinsic rate of increase. An orthogonal experiment demonstrated that production of yellow dwarfs can be induced by presumed less-suitable host-plant species at temperatures of 15° and 25°, but not 20°C. Crowding may also induce birth of yellow dwarfs. Possible advantages of the yellow dwarf developmental pathway are discussed.
UR - http://www.scopus.com/inward/record.url?scp=0043225711&partnerID=8YFLogxK
U2 - 10.1111/j.1440-6055.1996.tb01380.x
DO - 10.1111/j.1440-6055.1996.tb01380.x
M3 - Article
AN - SCOPUS:0043225711
SN - 1326-6756
VL - 35
SP - 153
EP - 159
JO - Australian Journal of Entomology
JF - Australian Journal of Entomology
IS - 2
ER -