Labor- und Freilandversuche zur Bekämpfung von vier Blattlausarten mit zwei synthetischen Juvenilhormon-Analogen

Ahmed, Shabir; Abdel-Gawaad, A. A.

doi:10.1007/bf01876511

Cited by 1 publication

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“…All tested materials increase the mean weight of larvae, the percentage of moths emerged from treated larvae were 10,2,O, O and 82 O/o for ZR-777,ZR-512, ZR-619,ZR-520 and control respectively. AHMED and GAWAAD (1975) reported that the two JHAS (ZR-777 and ZR-5 12) tested supressed progeny production of the different species of Aphids tested. WRIGHT et al (1974) indicated that JHA Staufier R-20 458 (1-[4-ethylphenoxy] -6,7-epoxy-3,7-dimethyl-Z-octene) affected at least 83 O / o reductions in adult emergence of the stable fly Stomoxys calcitrans with the reductions in the treated area ranging from 74-95.6 O / o .…”

Section: Introductionmentioning

confidence: 95%

Effect of three Juvenile hormone analogues on insects from different orders

Abdel-Gawaad

1976

Zeitschrift für Angewandte Entomologie

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Three Juvenile hormone analogues (JHAS): ZR‐777, 5 E (prop‐2‐ynyl 3,7,11 trimethyl‐[2 E, 4 E]‐dodecadienoate), Hydroprene or ZR‐512 (ethyl [E,E]‐3,7,11‐trimethyl‐2,4‐dodecadienoate) and ZR‐520, 4 E (ethyl 11‐methoxy‐3,7,11 trimethyl‐[2 E, 4 E]‐2,4‐dodecadienoate) were tested against the following insects: Periplaneta americana, (Orthopt.) Galleria mellonella, (Lepidopt.) Tenebrio molitor, (Coleopt.) and meat fly, Sarcophaga cergyrostoma (Dipt.) under laboratory conditions. There were morphological abnormalities in all insects, with the exception of the nymphs of Periplaneta. High doses of ZR‐777 and ZR‐512 (10% and 1%) killed all tested larvae and pupae of Tenebrio and Galleria. While the other doses increased the percentage of pupation by the decrease of concentration. A correlation was found between the concentration and the weight of pupae in the case of Tenebrio, this weight decreased with the increase of the concentration. Only very low concentration tested (0.001%) increased the weight of pupae than the control. No correlation was found in the case of Galleria between weight of pupae and concentration. While JHA tested decreased the longevity of pupal stage in Tenebrio, they increased the longevity of tested larvae of Periplaneta, Galleria and Sarcophaga and the longevity of pupae in the case of Galleria. In the case of Sarcophaga, there was correlation between the weight of pupae and the concentration, the weight decreased with the increase of the concentration. No adult was emerged from treated larvae at all concentrations tested. Zusammenfassung Wirkung von 3 Juvenilhormonanalogen auf Insekten unterschiedlicher Ordnung Es wurden die Schabe, Periplaneta americana, die Wachsmotte, Galleria mellonella, der Mehlkäfer, Tenebrio molitor, und die Fleischfliege, Sarcophaga cergyrostoma, mit den 3 Juvenilhormonanalogen (JHA): ZR 777, ZR 512 und ZR 520 behandelt. Bei allen genannten Arten, mit Ausnahme der Nymphen von Periplaneta, ergaben sich morphologische Abnormitäten. Hohe Dosen von ZR 777 und ZR 512 (10% und 1%) tüteten alle Larven und Puppen von Tenebrio und Galleria ab, während andere Dosierungen das Verpuppungsprozent (bei Abnahme der Dichte) erhühten. Bei Tenebrio nahm das Puppengewicht mit zunehmender Konzentration ab. Nur bei sehr niedriger Konzentration (0,001%) wurde es erhöht. Keine Beziehung zwischen Puppengewicht und Konzentration fand sich bei Galleria. Während die JHA die Lebensdauer der Puppen bei Tenebrio verminderte, verlängerte sie die Entwicklungsdauer der Larven bei Periplaneta, Galleria und Sarcophaga sowie die Lebensdauer der Puppen von Galleria. Bei Sarcophaga nahm das Puppengewicht mit steigender JHA‐Konzentration ab. Bei allen geprüften Konzentrationen entwickelten sich aus den behandelten Larven keine Adulten.

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Section: Introductionmentioning

confidence: 95%