After 38 days and at 19 ☌ (66.2 ☏) the wasp emerges and the whitefly nymph dies,” said María del Rosario Manzano PhD, Entomology Professor and Director of the Universidad Nacional de Colombia (UNal) in Palmira Tritrophic Interactions Research Group.Īfter extracting the honeydew from the wasp digestive tract and using a regent which detects this substance known as antana and then comparing it to adjoining plants, researchers determined that to improve the habitat of wasps for biological control it is recommendable to establish adjoining plants, wrongfully called ‘weeds’, which produce nutritious substances (sugar in form of extrafloral nectar) which favor insect populations thus providing shelter to the insect,” said UNal-Palmira Professor Joel Tupac Otero Ospina who has also supported the project. This egg hatches and develops into a larvae. “When the wasp detects the presence of the thick substance excreted by whitefly nymph when feeding, it searches the nymph and introduces an egg into its body. The wasp parasitoid potential lies when it lays its eggs on whitefly nymphs causing its death and fulfilling its parasitic or controlling action. Furthermore it releases honeydew which favors the appearance of the sooty mold which interferes with photosynthesis.
There is sucks the sap of plants and impacts plant yields. Whitefly females lay between 80 and 300 eggs, live between 5 and 28 days, and feed on young leaf undersides. In fact this small fly is one of the most important vegetable crop pests around the world. This yellow-green colored fly under 2mm long has an effect on approximately 16% of the vegetable crops of the area of the Province of Valle del Cauca. Amitus fuscipennis is the wasp which roam plants around vegetable crops and suck its extrafloral nectar. Farmers of the settlement of Regaderos (Province of Valle del Cauca) have the remedy in their crops to attack the greenhouse whitefly (Trialeurodes vaporariorum).
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