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Unformatted text preview: process reduces the plants food supply and makes the leaves curl up and dry out. The aphid may also introduce harmful viruses into the plant so spreading disease. proboscis food-carrying cells Section through aphids head to show feeding process gut The aphids and the nymphs feed on the plants leaves and buds, sucking the sap by means of piercing and sucking mouthparts, the proboscis The plant sap contains abundant sugars but few amino acids. The excess sugar solution is ejected from the anus as honey dew. This fluid is keenly sought by ants which will often be seen in conjunction with an aphid infection. If the honey dew remains on the leaves it encourages the growth of mildew fungus. D.G. Mackean...
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- Fall '11