摘要:

Leather dispensers, rubber septa (stopper), a polyethylene vial, polyurethane foam (2 pore sizes), and a hollow fiber dispenser, each charged with(E,Z)-3, 13-octadecadien-1-ol acetate (EZ-ODDA), the sex pheromone of the lesser peachtree borer,Synanthedon pictipes(Grote&Robinson), were evaluated for longevity of attractiveness in field tests in north central Florida in 1978–79. Except for traps baited with hollow fiber dispensers charged with 16 mg of EZ-ODDA, more males were captured in traps with a leather dispenser charged with 500 μg than in traps with other dispensers similarly charged. Traps with the leather dispenser (charged once) captured 1.8–2.4× more males in 3 tests in 1978, an 8-wk period, and 1.3 – 2.3× more males in 2 tests in 1979, also for 8 wk, than traps with rubber stoppers charged every 3 wk.

ISSN:1754-5692    

DOI:10.1093/ee/9.6.818

出版商:Oxford University Press    

年代:1980

数据来源: OUP

摘要:

Larvae ofFrumenta nundinellaZeller utilize two different resources of their only host, horsenettle (Solanum carolinenseL.). Larvae develop either within capsules fused from terminal leaves, or within fruits. In greenhouse rearing, the sex ratio at emergence was 1:1 for each type of development. Emergence from infested fruits required 50% more degree-days than emergence from leaf capsules. Fruit infestation occurred in the absence of pollination, demonstrating that moth larvae could stimulate parthenocarpy. Parthenocarpy also was induced by flower style removal, suggesting that tissue destruction by feeding larvae was sufficient to initiate fruit set. Stimulative parthenocarpy, which also occurs in fig wasps, ensures development of infested fruits.

ISSN:1754-5692    

DOI:10.1093/ee/9.6.821

出版商:Oxford University Press    

年代:1980

数据来源: OUP

摘要:

Larval development and adult emergence, population levels, oviposition and parasitism ofSciopithes obscurusHorn were determined in western Oregon. Five larval instars developed in 239 days. At 20°C, adults began emerging 288 days after 1st instars were placed on roots of container-grown strawberry. Larvae were collected from mid-June to August. Adult emergence occurred during July. Highest numbers of adults were observed on rhododendron between August and October. Between May and November, the percentage of field-collected adults containing mature oocytes ranged from 20 to 81% with the lowest percentages occurring in July and November. Larvae of a flyDolichotarsus(sp. unknown) (Diptera: Tachinidae) parasitized 32% of adult weevils in one rhododendron garden.

ISSN:1754-5692    

DOI:10.1093/ee/9.6.826

出版商:Oxford University Press    

年代:1980

数据来源: OUP

ISSN:1754-5692    

DOI:10.1093/ee/9.6.829

出版商:Oxford University Press    

年代:1980

数据来源: OUP