caa a22 4500 477073387 CHVBK 20180405111432.0 cr unu---uuuuu 170330e19960301xx s 000 0 eng 10.1007/BF02893297 doi (NATIONALLICENCE)springer-10.1007/BF02893297 Ripeness effects of three vegetable crops on abundance of augmentatively released psyttalia fletcheri (Hym.: Hraconidae): Improved sampling and release methods [Elektronische Daten] [M. Purcell, R. Messing] Effet du degré de maturité des fruits de 3 cultures légumières sur l'abondance de Psyttalia fletcheri (Hym. Bracpnidae) à la suite de lâchers de renforcement : amélioration de l'échantillonnage et des métnodes de lâcher Studies were done to determine the effect of 4 fruit ripeness levels on the abundance of Psyttalia fletcheri (Silvestri),a parasitoid of Bactrocera cucurbitae (Coquillett). In addition,an improved trapping method was developed for monitoring massreleased adult parasitoids in the field. A total of 420,000 adult P. fletcheri were released over a period of 15 weeks,in a 0.16 ha experimental field plot containing cucumber,zucchini and tomato in Kauai,HI. We recovered significantly more P. fletcheri from rotting fruits of all fruit types than from immature,commercial grade or oversized fruits. In addition,there was a positive correlation between the number of P. fletcheri and B. cucurbitae recovered from rotting fruits. Average parasitism in rotting tomato,zucchini and cucumber was 5,19 and 36% respectively. Yellow pan traps were as effective as sticky sphere traps for monitoring P. fletcheri,indicating that parasitoids were foraging close to the ground where rotting fruits occurred. The pan traps were much easier to use,less expensive and required less set up time. Recovery of parasitoids from both fruit collections and pan traps indicated that P. fletcheri was least abundant in tomato. Both male and female parasitoids exhibited a weakly aggregated distribution in each crop. We discuss modified sampling and release methods for population estimation and augmentative release studies of P. fletcheri. Lavoisier Abonnements, 1996 Psyttalia fletcheri nationallicence melon fly nationallicence augmentative release nationallicence biological control nationallicence sampling nationallicence trapping nationallicence Purcell M. Tropical Fruit and Vegetable Research Laboratory, USDAARS, P.O. BOX 4459, 96720, Hilo, HI, USA aut Messing R. Dept. Entomology, Kauai Research Center, University of Hawaii, 7370 Kuamoo Rd., 96746, Kapa'a, HI, USA aut Entomophaga Springer Netherlands 41/1(1996-03-01), 105-116 0013-8959 41:1<105 1996 41 10526 https://doi.org/10.1007/BF02893297 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02893297 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Purcell M. Tropical Fruit and Vegetable Research Laboratory, USDAARS, P.O. BOX 4459, 96720, Hilo, HI, USA aut NATIONALLICENCE 700 1- Messing R. Dept. Entomology, Kauai Research Center, University of Hawaii, 7370 Kuamoo Rd., 96746, Kapa'a, HI, USA aut NATIONALLICENCE 773 0- Entomophaga Springer Netherlands 41/1(1996-03-01), 105-116 0013-8959 41:1<105 1996 41 10526 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer