Effect of aqueous extracts of black alder (Alnus glutinosa (LINNAEUS, 1753) GAERTNER, 1791) and elder (Sambucus nigra LINNAEUS, 1753) on the occurrence of Brevicoryne brassicae LINNAEUS, 1758 (Hemiptera, Aphidoidea), its parasitoid Diaeretiella rapae (M’INTOSH, 1855) (Hymenoptera, Ichneumonoidea) and predatory Syrphidae on white cabbage
Author:
Jankowska Beata,Wojciechowicz-Żytko Elżbieta
Abstract
Abstract
The insecticidal and antifeedant effects of aqueous extracts from two common plants (black alder Alnus glutinosa and elder Sambucus nigra) on the occurrence of Brevicoryne brassicae, its parasitoid Diaeretiella rapae and predatory Syrphidae on white cabbage were investigated in 2008-2009. Both extracts reduced the number of cabbage aphids, although the Sambucus nigra extract proved to have a better effect. Differences were seen both in the numbers of winged aphids settling on plants and in the overall numbers of aphids on plants during the entire season. There were no significant differences in the degree of parasitization by Diaeretiella rapae in the three experimental combinations. Eight species of Syrphidae were found in the Brevicoryne brassicae colonies: Episyrphus balteatus, Sphaerophoria scripta, S. rueppelli, S. menthastri, Eupeodes corollae, Scaeva pyrastri, Scaeva selenitica and Syrphus vitripennis. The dominant species was Episyrphus balteatus. The largest numbers of syrphid larvae and pupae were collected from cabbage aphid colonies on the control plants. Smaller numbers were recorded on the plot where the cabbages were sprayed with the Sambucus nigra extract. The results of this study indicate that botanical insecticides based on S. nigra have the potential to be incorporated into control programmes for the cabbage aphid.
Publisher
Walter de Gruyter GmbH
Subject
Insect Science,Ecology, Evolution, Behavior and Systematics
Reference84 articles.
1. nigra of;ATKINSON;Journal Ecology,2002
2. Parasitoids of aphidophagous Syrphidae occurring in cabbage aphid brassicae colonies on cabbage vegetables of Plant Protection Research;JANKOWSKA;Journal,2004
3. Occurrence of Diaeretiella rapae in the cabbage aphid brassicae colonies on the different cruciferous crops and Vegetable Growing;JANKOWSKA;Horticulture,2003
4. Hoverflies of Northwest Europe Identification keys to the Syrphidae Publishing Utrecht The;VAN VEEN,2004
5. Species spectrum relative abundance and populations dynamics of parasitoids and hyperparasitoids of Brevicoryne brassicae persicae on white mustard alba Aphids and Other Homopterous Insects;GABRYŚ,1994
Cited by
2 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献