Females are capable of producing eggs asexually if they lack a mate. Females use the serrated edge of the ovipositor to cut small holes in plants and deposit eggs. There may be tiny black spots on leaves due to the insect’s excrement. This pest feeds on the tender, pale green leaves causing sunken, reddish to purplish spots along the midrib. Thrips life cycle consists of going from eggs to larvae to adults, in a total of nineteen days at 70-degree Fahrenheit. Thrips have two pairs of wings and are normally whitish/yellowish (adults are a little darker). They’ll attract the adult Thrips and capture them which means that they won’t be able to lay eggs in the other plants. Thrips also can transmit serious plant diseases. Adults can live up to thirty days, and the females lay 2- 10 eggs per day. Thrips feed mainly on the upper surfaces of the leaves along with flowers, buds, fruits and vegetables. Reproduction & Life Cycle. Multiple generations occur in a single growing season. They feed for 7–14 days. If you increase temperature by five more degrees they become adults in just thirteen days!. If thrips populations are not controlled, affected flowering plants may lose their ability to produce. Thrips do invade homes, possibly brought in on potted plants, and some species have been known to bite humans. Heavily infested leaves eventually become tough and brown or yellow. Adult thrips are small, fast-moving insects, while young thrips look like tiny unmoving pale worms on the leaves. The larvae, or the teenagers, are wingless. Thrips are tiny insects with piercing and sucking mouth parts. Adult saw-tailed thrips are primarily female, because female thrips develop from unfertilized eggs, while male thrips develop from fertilized eggs. Unlike most caterpillar species, they eat or rasp out a hollow in plant matter in which to lay their eggs, providing them shelter from potential predators. As the infestation progresses, the leaves will mottle, turn yellowish or silverish. Most thrips are brown and some have wings and some don’t. Advantages. Tubuliferan thrips in multiple stages of life cycle. Adult thrips feed on plants and lay eggs on or inside plant leaves. Eggs are deposited on young leaves and in buds. Will reduce the spread of Thrips by capturing the adult. Immature thrips cause the leaves to curl inward or fold into a pocket in which the thrips continue to develop and in which they lay eggs. This solution is definitely not a final one but it’s a good way to manage the spread of the infestation until you get can a more serious solution in place. The eggs hatch into hungry larvae that can mature in as little as two weeks. Source: Scot Nelson. The eggs can be laid any time of year and hatch within a few days in warm, indoor conditions. 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