Open Access. Powered by Scholars. Published by Universities.®
- Institution
- Publication
- Publication Type
- File Type
Articles 1 - 2 of 2
Full-Text Articles in Life Sciences
Competition For Aphid Prey Between Different Lady Beetle Species In A Laboratory Arena, Christy Leppanen, Andrei Alyokhin, Serena Gross
Competition For Aphid Prey Between Different Lady Beetle Species In A Laboratory Arena, Christy Leppanen, Andrei Alyokhin, Serena Gross
Andrei Alyokhin
Direct competition for aphid prey (Hemiptera: Aphididae) was evaluated between and among several lady beetle species (Coleoptera: Coccinellidae). The behavior of three native (Coccinella trifasciata, Coleomegilla maculata, and Hippodamia convergens) and four nonnative (Coccinella septempunctata, Harmonia axyridis, Hippodamia variegata, and Propylea quatuordecimpunctata) lady beetles was observed in laboratory arenas. The beetles were kept alone, paired with conspecifics or paired with heterospecifics, and presented with potato aphids (Macrosiphum euphorbiae). Harmonia axyridis was the most successful aphid predator in our study, being able to find aphids more quickly and consume more of them compared to most other lady beetle species. It was …
Effect On Bees Of Insecticides Used On Rape, A C. Kessell
Effect On Bees Of Insecticides Used On Rape, A C. Kessell
Journal of the Department of Agriculture, Western Australia, Series 4
Rapeseed could provide beekeepers in Western Australia with a valuable new honey crop—hut insecticidal spraying of rape at flowering time is a potentially serious threat to most commercial beekeepers.
There are indications that insect pollination may improve rapeseed yields, so both growers and beekeepers could gain from a co-operative approach to the problem. Spraying after sundown and preventing spray drift to nearby apiaries should avoid most losses.