Diglyphus isaea

Diglyphus isaea can be applied for wide assortment of vegetable and ornamental crops (tomato, sweet pepper, melon, gerbera, chrysanthemum and etc.) in the conditions of covered ground against the flies. These small insects are black with dark-green metallic glitter. Its length is 0.8–2.8 mm. It is a wide-spread ectoparasite of different life-miner flies (Liriomyza bryoniaeL. trifoliiL. huidobrensisPhytomyza syngenesiae). Having found a miner larva she pierces it several times. The afflicted larva of a miner is paralyzed and stops feeding process. Having paralyzed the larva of the miner the female begins to lay eggs. During her life span she can lay about 200–300 eggs. After emergence from the egg a parasite larva feeds on the surface of the paralyzed miner. It pupates directly in the miner. The time of development from the egg to the adult at a temperature of 15°C takes 26–27 days, at 25°C lasts 10–11 days. While the species Liriomyza bryoniae develops for 41, 27, and 17 days at temperatures of 15°C, 20°C, and 25°C respectively.

The rate of parasite application is 0.25–0.5 individuals per 1 m2. If necessary the releases are made repeatedly. The optimal conditions for the species Diglyphus isaea are a temperature of 25°C, and a relative air humidity of 40–60%.

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Advantages

  • wide crop assortment for application;
  • the affliction of the most harmful species Liriomyza and Phytomyza;
  • the high activity of population development and the suppression of harmful species;
  • pest larva paralyzing that allows to reduce the harmfulness of a phytophage.