Abstract
Sipha flava is a serious pest in sugarcane in southern Florida, so efforts in better understanding its biology were initiated. Development, longevity, and fecundity of alate and apterous S. flava (Forbes) feeding on Sorghum bicolor [L.] Moench., cultivar ‘Kow Chow,’ were examined under near-ambient temperature and lighting conditions within a glasshouse. After examining several body dimensions during apterous aphid development (antennal length, head width, body length, and abdominal width), antennal length was found to be the best indicator of an instar. Apterous aphids completed development from nymph to adult in ≈8 d and passed through four instars. A comparison between the sizes of apterous and alate morphs indicated that apterous females were larger and weighed more than the alates. Both morphs survived equally as long during reproduction (21 d) but produced slightly different numbers of nymphs over their life (apterous = 54.3, alate = 48.2). During the first 8 d of reproduction, apterous adults produced 3.3 nymphs/d and alates produced 2.3 nymphs/d. However, during the following 8 d, nymphal production by apterous females dropped to 2.7 nymphs/d but increased to 2.9 nymphs/d by alates. The estimated intrinsic rate of natural increase (rm) for apterous aphids was 0.314. The net reproductive rates (Ro) for alate and apterous adults based on 0% nymphal mortality were 45.80 and 53.09 and for 21% nymphal mortality were 36.3 and 41.9, respectively.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 17
Claim · model-written summary
Antennal length best indicated the instar of apterous aphids.
- Outcome
- antennal lengthe0
Not reportedTaxon
Verbatim
e0“antennal length was found to be the best indicator of an instar”
Claim · model-written summary
Apterous aphids completed nymph-to-adult development in about eight days.
Not reportedTaxon
Verbatim
e0“Apterous aphids completed development from nymph to adult in ≈8 d and passed through four instars”
Claim · model-written summary
Apterous aphids passed through four instars.
- Outcome
- four instarse0
Not reportedTaxon
Verbatim
e0“Apterous aphids completed development from nymph to adult in ≈8 d and passed through four instars”
Claim · model-written summary
Apterous females were larger than alates.
Not reportedTaxon
Verbatim
e0“apterous females were larger and weighed more than the alates”
Claim · model-written summary
Apterous females weighed more than alates.
Not reportedTaxon
Verbatim
e0“apterous females were larger and weighed more than the alates”
Claim · model-written summary
Both morphs survived 21 days during reproduction.
Not reportedTaxon
Verbatim
e0“Both morphs survived equally as long during reproduction (21 d)”
Claim · model-written summary
Apterous aphids produced 54.3 nymphs over their life.
Not reportedTaxon
Verbatim
e0“produced slightly different numbers of nymphs over their life (apterous = 54.3, alate = 48.2)”
Claim · model-written summary
Alate aphids produced 48.2 nymphs over their life.
Not reportedTaxon
Verbatim
e0“produced slightly different numbers of nymphs over their life (apterous = 54.3, alate = 48.2)”
Claim · model-written summary
During the first eight reproductive days, apterous adults produced 3.3 nymphs per day.
Not reportedTaxon
Verbatim
e0“During the first 8 d of reproduction, apterous adults produced 3.3 nymphs/d and alates produced 2.3 nymphs/d”
Claim · model-written summary
During the first eight reproductive days, alates produced 2.3 nymphs per day.
Not reportedTaxon
Verbatim
e0“During the first 8 d of reproduction, apterous adults produced 3.3 nymphs/d and alates produced 2.3 nymphs/d”
Claim · model-written summary
In the following eight days, apterous nymphal production fell to 2.7 per day.
Not reportedTaxon
Verbatim
e0“during the following 8 d, nymphal production by apterous females dropped to 2.7 nymphs/d but increased to 2.9 nymphs/d by alates”
Claim · model-written summary
In the following eight days, alate nymphal production rose to 2.9 per day.
Not reportedTaxon
Verbatim
e0“during the following 8 d, nymphal production by apterous females dropped to 2.7 nymphs/d but increased to 2.9 nymphs/d by alates”
Claim · model-written summary
Estimated intrinsic natural increase of apterous aphids was 0.314.
Not reportedTaxon
Verbatim
e0“The estimated intrinsic rate of natural increase (rm) for apterous aphids was 0.314”
Claim · model-written summary
At zero nymph mortality, net reproductive rate of alates was 45.80.
Not reportedTaxon
Verbatim
e0“The net reproductive rates (Ro) for alate and apterous adults based on 0% nymphal mortality were 45.80 and 53.09”
Claim · model-written summary
At zero nymph mortality, net reproductive rate of apterous adults was 53.09.
Not reportedTaxon
Verbatim
e0“The net reproductive rates (Ro) for alate and apterous adults based on 0% nymphal mortality were 45.80 and 53.09”
Claim · model-written summary
At 21% nymph mortality, net reproductive rate of alates was 36.3.
Not reportedTaxon
Verbatim
e0“for 21% nymphal mortality were 36.3 and 41.9, respectively”
Claim · model-written summary
At 21% nymph mortality, net reproductive rate of apterous adults was 41.9.
Not reportedTaxon
Verbatim
e0“for 21% nymphal mortality were 36.3 and 41.9, respectively”