In this way, what will kill thrips?
Thrips on flowers can be eliminated as soon as you see signs of damage by using a mild insecticide like insecticidal soap or neem oil, or by pruning the flowers.
Subsequently, question is, does cold kill thrips?
The insects themselves are rarely seen without a hand lens. In warm weather, thrips eggs hatch in days, although cold weather may delay hatching for weeks to months. Conventional pesticides (such as Malathion) used to control aphids and whiteflies also kill thrips.
Life Cycle Adults and pupae overwinter in garden soil. In spring, newly emerged females insert eggs into the tissues of flowers, leaves or stems. (They do not need to mate for reproduction.) After two or more nymphal stages, many thrips drop to the soil to pupate.