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An aphid infestation can ruin a garden. Learn what causes aphids and how to identify, kill, and control them naturally for healthy plants with no aphid holes.
The aphids can cause stunted growth in trees with heavy infestations rendering badly damaged trees unsellable. [1] Other species of adelgids also infest fir trees, those include the pine bark adelgid, the Cooley spruce gall adelgid (Adelges cooleyi), and the eastern spruce gall adelgid (Adelges abietis). [3] Another serious pest are bagworms ...
Aphids can also transmit viruses and allow sooty mold to take hold. When the population becomes too large, an aphid might grow wings and fly away to find a fresh host plant.
The aphids may not be the original source of infection, but are instrumental in spreading the virus through the crop. [9] Various chemical treatments are available to kill the aphids and organic growers can use a solution of soft soap. [12] Wasp laying egg inside an aphid's body Aphids tended by ants
The aphids do not usually cause much damage to overall tree health, but dieback is occasionally seen on very heavily infested branches. If infestations are heavy, twigs may die, but damage to the tree is usually minor. The aphids can be blasted off with a jet of water or can be controlled with any insecticides labeled for aphids.
White oil is sold commercially as a petroleum oil-based organic pesticide, in both a concentrate, [3] [4] [5] and ready-to-use spray bottle or can. [6] [7]The term "horticultural oil" may be used to differentiate this petroleum oil-based product from homemade products using vegetable oil.