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Blooming marvel

Blooming marvel

作者:相里汆  时间:2019-03-07 07:09:02  人气:

INSECT pests can influence the time a flower blooms. Although flowering is affected by the weather and the supply of nutrients and pollinators, little is known about the impact of seed-munching pests on the evolution of flower timing, says Diana Pilson of the University of Nebraska in Lincoln. So Pilson studied the effects of five seed pests on wild sunflowers ( Helianthus annus). She found that two early-season pests, the sunflower moth and the sunflower bud moth, inflicted the most damage. As a result, plants that flowered later produced most seeds (Oecologia, vol 122,