Development Georgia Extension Tele-Tips Control of Aphids on Vegetables Lady beetles destroy large numbers of aphids. Aphids secrete a sticky substance on the leaves called honeydew. A black sooty mold will often grow on this honeydew. These insects often gather on the underside of leaves and on stems. They suck plant juices, stunt growth, and cause the leaves to curl.
Aphids secrete a sticky substance on the leaves called honeydew.
A black sooty mold will often grow on this honeydew. There are several beneficial insects, such as lady beetles, that will destroy large numbers of aphids. If you see any lady beetles among the aphids, give them a few days to reduce the population. If you see no lady beetles, or they fail to reduce the number of aphids, use either a 57 percent malathion emulsifiable concentrate, a 5 percent malathion dust or thiogard 3 . Safers insecticidal soap can also be used.