Photoperiod influence on the biology and phenological characteristics of Dichelops melacanthus (Dallas, 1851) (Heteroptera: Pentatomidae)
Braz. j. biol
;
63(4): 655-664, Nov. 2003. ilus, tab, graf
Artigo
em Inglês
| LILACS
| ID: lil-355883
RESUMO
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 percent. 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 percent and 65 percent of females oviposited, respectively, in comparison to 10 percent and 15 percent 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.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Fotoperíodo
/
Heterópteros
Limite:
Animais
Idioma:
Inglês
Revista:
Braz. j. biol
Assunto da revista:
Biologia
Ano de publicação:
2003
Tipo de documento:
Artigo
País de afiliação:
Brasil
/
Estados Unidos
Instituição/País de afiliação:
United States Department of Agriculture/US
/
Universidade Federal do Paraná/BR
Similares
MEDLINE
...
LILACS
LIS