Dramatic cross-pollination may occur in the presence of pollinating insects during flowering. This ultimately gains insight into cross pollination techniques carried out by pollinating bodies. They emit strong smell to attract bees and other pollinating insects. The distinctive umbels and floral nectaries attract pollinating insects. Bees play in a significant role in pollinating crops. Both nectar and pollen act as incentives to pollinating species. These wasps act as parasites to either the fig or possibly the pollinating wasps. Insects pollinating the flowers of angiosperms, is another example. These should not be applied to flowers visited by pollinating insects. Most "Brugmansia" are fragrant in the evenings to attract pollinating moths. Harvesting vanilla fruits is as labor-intensive as pollinating the blossoms. The perigone also functions as a landing platform for pollinating insects. To avoid damage from pollinating beetles, the carpels of "Magnolia" flowers are extremely tough. They can be highly modified along with the pollinating insects by co-evolution. They benefit ecosystems and human interests by pollinating plants.