Mode of action: Eggs are deposited on the underside of leaves close to aphid colonies. When the larvae emerge, they start searching for prey immediately and will move on to the next colony as the food supply diminished. Adults can consume several thousand aphids during their lifetime. Fourth instar larvae consume per day as many aphids as adult ladybird. Each larvae may consume several hundred aphids during its development.
Introduction method and release rates: Introduce the larvae in the center of aphid hotspots. The amount of larvae needed depends on the size of the infection and the development/growth of the culture. Check and reintroduce every week if necessary.
Adalia – 100 pcs
Adalia – 100 pcs
The cotton aphid (Aphis gossypii)
The cotton aphid (Aphis gossypii) is a 0.9-1.8 mm small, round aphid with typical black spiracles. The colour varies from light yellow to dark-green, or sometimes almost black. It has a short cauda, no head front knobs, and antennae shorter than the body.
The cotton aphid originates from warmer regions where it is a pest on cotton and Cucurbitaceae. Thanks to the warm climate in greenhouses it can also survive northern winters. The cotton aphid is mainly a pest on greenhouse vegetables such as cucumber and melon, and on ornamentals such as chrysanthemum andhibiscus. Greenhouse strains do not change their host plant. After hibernation in the greenhouse this aphid can become a pest early in spring.
More than other aphid species, populations of cotton aphids can grow very fast. There exist several strains of cotton aphids, each with a specific preference for a certain host and resistance against pesticides.
Identification and Biology : Adults are 3.5-5.5 mm in length. The adult is easily identified by its bright red to orange-yellow elytra (or wing cases) each of which has a single black spot. The eggs are 1.0-1.5 mm long, orange-yellow in color. The larvae are brown or blackish grey with black and yellow or orange spots, and are 5-6 mm long when fully grown. Adults are long-lived (1-3 month during the growing season)