Affiliation:
1. Universidade Federal do Paraná, Brazil
2. United States Department of Agriculture, USA
Abstract
The influence of the photoperiod on the biology and seasonal morphs of Dichelops melacanthus (Dallas, 1851) was studied in the laboratory. Four different photoperiods (11, 12, 13, and 14 hL = hours of light) were tested, keeping the temperature at 25 ± 1ºC and the relative humidity at 65 ± 5%. Nymph developmental time tended to be longer under shorter photophases (11 and 12 hL). The 14-hour photophase (long day) resulted in lower nymph mortality rates. Females maintained at 13 and 14 hL showed greater weight gain (1st-28th day) than females under 12 hL. D. melacanthus showed reproductive oligopause induced by short photophases, especially when exposed to 11 hL. Under 13 and 14 hL, 85% and 65% of females oviposited, respectively, in comparison to 10% and 15% of females ovipositing under 11 and 12 hL, respectively. Fecundity (number of egg masses and number of eggs/female) was greater in the longer than under the shorter photophases. Seasonal dimorphism induced by photoperiod was observed in D. melacanthus adults. Under short-day conditions (11 and 12 hL), adults showed short and rounded shoulder spines, grayish brown abdomen (mainly in 11 hL), high lipid contents, and lower percentage of mature reproductive organs. Under long-day conditions (13 and 14 hL), the stink bugs showed greatly developed shoulder spines, green abdomen, low lipid contents, and mature reproductive organs.
Subject
General Agricultural and Biological Sciences
Reference17 articles.
1. Ecologia de populações, biologia e estratégias da história de vida de Oebalus poecilus (Dallas, 1851) (Hemiptera: Pentatomidae);ALBUQUERQUE G. S.,1989
2. Planting time as a tactic to manage the small rice stink bug, Oebalus poecilus (Hemiptera: Pentatomidae) in Rio Grande do Sul, Brazil;ALBUQUERQUE G. S.;Crop Protection,1993
3. Photoperiodic and temperature effects on rate of development and diapause in the green stink bug, Nezara viridula L. (Heteroptera: Pentatomidae);ALI M.;Z. Ang. Entomol.,1977
4. Color change as an indicator of adult diapause in the southern green stink bug Nezara viridula;HARRIS V. E.;J. Agric. Entomol.,1984
5. Photoperiodic induction of diapause hibernation and voltinism in Piezodorus hybneri (Heteroptera: Pentatomidae);HIGUCHI H.;Appl. Entomol. Zool.,1994
Cited by
30 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献