Effects of photoperiod and temperature on head-capsule size in<i>Planotortrix octo</i>(Lepidoptera: Tortricidae)

Morris, Michael

doi:10.1080/03014223.1991.10422850

Cited by 3 publications

(2 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This reduction in the value of morphometric parameters of C. partellus larvae at higher critical temperature coupled photoperiod condition could be due to faster metabolism and moltings without corresponding increase in growth rate. Similar results have also been reported in Platynota stultana Walsingham (Polania & Helgesen, ), Manduca sexta (Linneaus) (Nijhout, ), Trichoplusia ni (Hubner) (Jones, Jones, & Hammock, ), Culex quinquefasciatus (Say) and Aedes aegypti (Linneaus) (Rueda, Patel, Axtell, & Stinner, ), and Planotortrix octo Dugdale (Morris, ).…”

Section: Discussionsupporting

confidence: 81%

See 1 more Smart Citation

Factors responsible for estivation in spotted stem borer, Chilo partellus (Swinhoe)

et al. 2019

View full text Add to dashboard Cite

Diapause is an important adaptive trait in certain groups of insects at a particular stage, which contribute in controlling insect ecology, phenology, and physiology. Considering the importance of various factors in appropriate combinations, we studied effects of different temperature and photoperiod conditions on larval morphometrics, development, induction, and termination of estivation, and overall mortality due to estivation in Chilo partellus (Swinhoe). Weight, length, and head capsule width of C. partellus larvae significantly increased with increase in temperature and photoperiod treatments upto certain age and duration of exposure. According to Dyar's ratio, overall head capsule width progressed geometrically with minimum constant ratio of 1.20, and second‐degree polynomial regression equations were best fitted to all the test treatment conditions. The mortality of diapausing C. partellus individuals varied between 7.0% and 37.3% under different constant and varying temperature and photoperiod regimes, which at 38°C + 14L:10D reached upto 100.0%. However, the exposure to 30°C + 12.5L:11.5D and 32°C + 13L:11D along with dry food accelerated the process of estivation, wherein the diapause larval survival was significantly higher and overall mortality of individuals due to diapause was lower suggesting these conditions appropriate for induction of estivation in C. partellus. These studies have implications for better understanding the bioecology and population regulation system under varying climatic conditions and devising novel strategies for management of C. partellus.

show abstract

Section: Discussionsupporting

confidence: 81%

“…Trichoplusia ni (Hubner) (Jones, Jones, & Hammock, 1981), Culex quinquefasciatus (Say) and Aedes aegypti (Linneaus) (Rueda, Patel, Axtell, & Stinner, 1990), and Planotortrix octo Dugdale (Morris, 1991).…”

Section: Discussionmentioning

confidence: 99%