April 2024
An application of horticultural oil can kill many of the overwintering insect pests that would normally plague plants in the late spring, such as aphids. If left untreated, the plant will become too weak to support itself and will eventually die.
Pests can also quickly migrate to nearby plants if they become overcrowded, or when the nutrients of the original host are becoming depleted.
When horticultural oils are sprayed onto the plant, the oil covers any exposed insects or eggs and suffocates them by clogging their breathing tubes.
