Keeping natural predators around will prevent whiteflies from ever exploding in population. For this reason, avoid using insecticides. Ladybugs, spiders, green lacewing larvae, and dragonflies are a few of many beneficial insects that can control a whitefly population. Hummingbirds are another natural predator. Begin control measures at the first sign of a whitefly infestation. One way to reduce the whitefly population on an infested plant is to wash the undersides of the leaves with a moist cloth or sponge. Unfortunately, washing is labor intensive and only practical for small plants. Insecticides are another control option.
Whiteflies are also prolific because their numbers increase from two to four, four becomes eight, eight becomes 16 and so on. During the hottest part of the summer, whiteflies may mature from the egg stage to an adult (ready to lay more eggs) in as few as 16 days. Whiteflies can cause two types of damage to a plant. The adult whitefly female can lay hundreds of eggs on the underside of leaves, usually in a circular pattern. In hotter weather, one whitefly can even go from egg stage to grown adult in just 16 days. Since whiteflies live for a month or two, in warmer climates and in greenhouses, the reproduction cycle is almost continuous and the growth of.
Dec 02, · In the latter part of spring, whitefly adults place their eggs on the undersides of leaves. Typically, these are done in concentric patterns, towards the upper portion of the plant. An adult whitefly can produce eggs. Five to ten days later, the whitefly .