Adult aphid midges are small (2-3 mm), delicate, gnats-like flies with long, dangling legs and long antennae. Eggs are oval, minute (about 0.1 mm by 0.3 mm), and orange. The larvae, which look like orange maggots, are tiny, growing through 3 instars from minute to 2-3 mm. Depending on their food source, they are bright orange to red, and their bodies narrow toward the head. The larvae have strong “jaws” with which they grasp their prey.
Each female can live for 1 to 2 weeks and deposit about 70 orange eggs singly or in clusters on leaves among aphid colonies. The eggs hatch in 2 to 4 days.
Upright placed, orange, deposited on leaves among aphid colonies. Fertility is 70 eggs.
In greenhouses the larvae drop to the soil less than a week after hatching and burrow to pupate; adults emerge about 1 to 2 weeks later.
The adult is 2.5 to 3 mm in length, black with long, dangling legs and long antennae. Adult midges fly at night and are rarely seen; they feed on honeydew.
Aphidoletes feed on the larval pest instars, previously killing them by injecting a toxin that paralyzes the victim. The larva can kill from 3 to 50 aphids per day. In massive aphid colonies Aphidoletes larvae kill much more victims than they can eat.
Use of the beneficial insects.
- In the case of a small infestation, blisters are used, each of them contains 250 predators. Before release, the blisters are kept at a room temperature until the first adults emerged. The blisters are placed in aphid colonies, protected from sunlight and high temperatures.
- In the case of mass infection use 125 or 500 ml – bottles, which contain 1000 midge individuals. Pupae are in a moist carrier material, such as vermiculite. It is necessary to distribute midges in small piles in aphid colonies, always in a humid place, protected from direct sunlight. For example, on the substrate.
Recommended standards for Aphidoletes aphidimyza applying
|Bioagent name in Latin
||Doses of the application by infection degree
|Frequency of application
||In a week
This information is indicative. We give individual recommendations in case you indicate your climatic conditions, type of crop, and infestation level. To use the correct biological protection methods, please contact the specialist of Bio Protection Company.
Conditions and duration of storage
- keep in a cool dark place at a temperature between 10-15 °C/43-46 °F until ready for use;
- use within 18 hours after receiving;
- don’t keep in a refrigerator.
Beneficial insects have a short life span, so distribute them as quickly as possible.
- packs of 4 blisters, each contains enough pupae to produce 250 adults;
- 5 – liter paper bag contains 125,000 or 250,000 predatory mites;
- 125 or 500 ml – vial contains 1000 pupae in moist vermiculite carrier. The 125 ml-bottle is designed to give high doses in the case of mass infestation;