Adults can live up to thirty days, and the females lay 2- 10 eggs per day. Plants that have been damaged by thrips become dull green and develop a silvery-white discoloration of the upper surface (A metallic sheen on leaves is one sure indicator of Thrips). Eggs are deposited on young leaves and in buds. Thrips do invade homes, possibly brought in on potted plants, and some species have been known to bite humans. Source: Scot Nelson. Adult thrips are small, fast-moving insects, while young thrips look like tiny unmoving pale worms on the leaves. Female thrips lay their eggs in tiny slits cut into the surface of leaves, flowers, and stems. Females use the serrated edge of the ovipositor to cut small holes in plants and deposit eggs. The softer plant tissues of new leaves or flower petals can have scars from oviposition. Thrips have two pairs of wings and are normally whitish/yellowish (adults are a little darker). Thrips life cycle consists of going from eggs to larvae to adults, in a total of nineteen days at 70-degree Fahrenheit. 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. 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. Advantages. The larvae, or the teenagers, are wingless. Females are capable of producing eggs asexually if they lack a mate. In fact, thrips can come in many forms, from wormy nymphs to dark or golden winged insects, depending on the stage of life and where you live. Multiple generations occur in a single growing season. The young, called nymphs, are cream to pale green and only visible with magnification. Adult thrips feed on plants and lay eggs on or inside plant leaves. If thrips populations are not controlled, affected flowering plants may lose their ability to produce. If you increase temperature by five more degrees they become adults in just thirteen days!. Leaf-feeding and flower thrips deposit eggs into plants through an egg-laying apparatus called an ovipositor. Thrips feed mainly on the upper surfaces of the leaves along with flowers, buds, fruits and vegetables. Reproduction & Life Cycle. They are found on the underside of the leaves, where they pierce the plant tissues to suck sap and lay their eggs. Most thrips are brown and some have wings and some don’t. Thrips are tiny insects with piercing and sucking mouth parts. 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 can be laid any time of year and hatch within a few days in warm, indoor conditions. There may be tiny black spots on leaves due to the insect’s excrement. Will reduce the spread of Thrips by capturing the adult. 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