POPULATION ECOLOGY Seasonal Patterns of Female Homalodisca coagulata (Say) (Hemiptera: Cicadellidae) Reproductive Physiology in Riverside, California
نویسندگان
چکیده
Female Homalodisca coagulata (Say) were collected from October 2001 to February 2005 from citrus at theUniversity of California, Riverside. Between 5 and 20 females per sampling date were dissected, and each was assigned an ovarian rank: previtellogenic, vitellogenic, or postvitellogenic. Ovarian ranking was used to characterize H. coagulata reproductive activity. Results of these dissections revealed consistent annual patterns in the proportion of previtellogenic females present in this Þeld population. These patterns indicate that there are two distinct generations annually, with an occasional third generation. A time-dependent model of H. coagulata vitellogenesis cycles in Riverside, CA, was developed, which makes it possible to predict the appearance of the subsequent generation based on previous observed peaks in the proportion of vitellogenic females.
منابع مشابه
Anatomy and Histology of Reproductive Organs of Female Homalodisca coagulata (Hemiptera: Cicadellidae: Proconiini), with Special Emphasis on Categorization of Vitellogenic Oocytes
The anatomy and histology of female Homalodisca coagulata (Say) (Hemiptera: Cicadellida: Proconiini) reproductive organs is described using light microscopy. The reproductive organs ofH. coagulata consist of one pair of ovaries, eachwith 10 telotrophic ovarioles, a pair of lateral oviducts, a common oviduct, a spermatheca, an enlarged genital duct, a complex bursa copulatrix, a vagina, two type...
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