Study on the attractiveness of common flowering shrubs in Guangzhou to natural enemies of insect pests
Nectar and pollen plants are important components of conservation biological control and play a significant role in the biological control of garden pests.To screen the flowering shrubs that providing extra nutrition to the adults of natural enemies in Guangzhou,yellow sticky boards were hung under the flower shoots to investigate the species and number of natural enemies of insect pests of the 24 common flowering shrubs in Guangzhou.The statistical significance of difference was analyzed between the number of natural enemy at flowering shrubs and the control plant with Student's t-test.The results showed that the natural enemies of insect pests were parasitic wasps,ladybugs,hoverflies and brown lacewings attracted in the flowering shrubs.The Student's t-test analysis found that different flowering shrubs had different attractiveness on natural enemies of insect pests.Parasitic wasps visited Justicia adhatoda,but preferred Rhaphiolepis indica and Rhodomyrtus tomentosa.Duranta erecta'Alba'was the most favorite flowering shrub of parasitic wasps.Ladybugs visited R.tomentosa.Calliandra tergemina var.emarginata,J.adhatoda and Vitex agnus-castus were the most favorite flowering shrub of ladybugs.Hoverflies preferred D.erecta'Alba'and Galphimia gracilis.Tecoma stans and Melastoma candidum were the most favorite flowering shrubs of hoverflies.Brown lacewings visited R.tomentosa,but D.erecta'Alba'was the most favorite flowering shrub of brown lacewings.The conclusion was that J.adhatoda,which blooms in early spring,R.tomentosa and V.negundo,which bloom in summer,and D.erecta'Alba',which blooms almost all the year round,can attract natural enemies of insect pests strongly.They can be used as nectar and pollen plants in the conservation biological control of garden pests in Guangzhou.
Flowering shrubsparasitic waspsladybugshoverfliesbrown lacewingsbiological control
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万方数据
