The effects of larval food on the longevity, fecundity and rate of egg maturation of the pink bollworm moths, Pectinophora gossypiella (Saund.)

Abstract

Adults developed from diapause larvae fed on okra pods, cotton bolls and kenaf fruits, the mean longevities of female moths was always significantly longer than males. There are highly significant differences between the longevities of moths of both sexes fed as larvae on different host plants. Moths developed from larvae fed on okra pods or cotton bolls laid more eggs than those reared on kenaf fruits. No ripe eggs were present in the ovarioles of a newly emerged female. Ripe eggs were found after 17–18, 20–21 and 24–25 h in moths when fed as larvae on okra pods, cotton bolls and kenaf fruits, respectively. The number of oocytes did not increase during the first 28–30 h from emergence. Zusammenfassung Wirkung der Raupenernährung auf die Lebensdauer, Fruchtbarkeit und Eireifungsquote von Pectinophora gossypiella (Saund.) (Lep., Gelechiidae) Die mittlere Lebensdauer weiblicher Falter von P. gossypiella, die aus Raupen hervorgingen, die mit Hibiscus esculentus‐Schoten, Baumwollekapseln und Hibiscus cannabinus‐Früchten gefüttert wurden, war stets signifikant größer als die der Männchen. Es bestanden hoch signifikante Unterschiede zwischen der Lebensdauer der Falter beiderlei Geschlechts, die von Raupen unterschiedlicher Ernährung stammten. Falter aus H. esculentus oder Baumwollekapseln fressenden Raupen legten mehr Eier als solche, die aus Raupen hervorgingen, welche H. cannabinus fraßen. Reife Eier wurden nach 17–18, 20–21 bzw. 24–25 h in den Eischläuchen solcher Falter gefunden, die aus Raupen stammten, welche mit H. esculentus, Baumwollekapseln, bzw. H. cannabinus gefüttert wurden. Die Zahl der Oozyten stieg während der ersten 28 bis 30 h nach dem Schlüpfen nicht an.

INFLUENCE OF LARVAL FOOD ON NUMBER OF SPERMATOPHORES, FECUNDITY AND SOME BIOCHEMICAL PARAMETERS OF THE SPINY BOLLWORM, Earias insulana (BOISD.)

“…The average numbers of spermatophores/ female were 1.00, 0.80 and 1.60 spermatophores/female, respectively. Khalifa et al (1981) found that feeding of P.gossypiella on okra pods caused an increase in the number of egg rudiments in the ovarioles as compared with those fed on cotton bolls and kenaf fruits. Tamhankar et al (1993) found in the E. vittella a positive correlation exists between mating frequency and fecundity.…”

“…The preferred hosts have a great influence on oviposition, fecundity, development period and longevity of adults of E. vittella and E. insulana (Khan and Rao, 1960). Khalifa et al (1981) found that females of P. gossypiella fed as larvae on okra pods laid the highest number of eggs followed by those fed on cotton bolls and kenaf fruits. The fecundity and longevity of H .armigerea was affected by fed during larval stage on different host plants (Shanower et al, 1997 andKulkarni andGawande, 1999).…”

“…) and E.insulana (Khan and Rao, 1960). Khalifa et al (1981) found that the females of Pectinophora gossypiella (Saund.) fed as larvae on okra pods laid the highest number of eggs followed by those fed on cotton bolls and kenaf fruits.…”