Viability and Fecundity of Alate Alienicolae of Aphis Fabae Scop . after Flights to Exhaustion
نویسنده
چکیده
Alate alienicolae of approximately uniform size were obtained from healthy colonies of the same clone maintained in the laboratory at 18 ±5° C. on broad beans (Vicia faba L., var. Claudia Aquadulce). They were collected within \ hr. of the final ecdysis and kept for 24 hr. on young beans in the dark at 20° C. to complete their teneral development and become ready for flight (Taylor, 1957). The aphids were flown on pins (Cockbain, 1961) at 25-26 C, 21-84% --> ^ in an air stream of 1 m.p.h. Experiments 1-5. Within each experiment there were two experimental (a and b) and two control (c and d) batches, 7-8 aphids per batch. Test aphids were flown to exhaustion and control aphids were flown for 15 min. in order to induce settling (see B. Johnson, 1958; Kennedy, 1958). After flight the aphids were kept in darkness on young beans, one batch per plant, at 20 C. and 45 % R.H., and brought into light at the same temperature and humidity after 3 days, i.e. when they had lost the ability to fly because their flight muscles had autolysed (B. Johnson, 1957). Larvae produced by the aphids were counted and removed when the plants were changed every 2-3 days, or whenever an adult died. Experiments 6-8. Test aphids were flown to exhaustion and then starved in glass tubes in darkness at 20 C. and 70 % R.H. ; unflown controls were starved under the same conditions.
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زیست شناسی مگس شکارگر [Leucopis glyphinivora Tanas. (Dip.: Chamaemyiidae)] و کارایی آن در مبارزه بیولوژیک با شته سیاه باقلا ( Aphis fabae Scop. )
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متن کاملزیست شناسی مگس شکارگر [Leucopis glyphinivora Tanas. (Dip.: Chamaemyiidae)] و کارایی آن در مبارزه بیولوژیک با شته سیاه باقلا ( Aphis fabae Scop. )
The biology of predatory fly, Leucopis glyphinivora Tanas. was studied under greenhouse conditions. Adult longevity was 8 days and the average fecundity was 35.7 eggs. Incubation period, the 1st, 2nd, 3rd larval instars and puparium duration averaged 2.7, 2.16, 3.48, 5.7 and 8.45 days, respectively. Each generation lasted about one month. The predator efficiency was studied by applying the egg ...
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