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Mycetophilidae

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Through Fungus, Thorax and Microscopic scale

Adults of this family can usually be separated from other small flies by the strongly humped thorax, well-developed coxae, and often spinose legs, but identification within the family between genera and species generally requires close study of microscopic features such as subtle differences in wing venation and variation in chaetotaxy and genitalia. The terrestrial larvae usually feed on fungi, especially the fruiting bodies, but also spores and hyphae, but some species have been recorded on mosses and liverworts. The larvae of some species, while still being associated with fungi, are at least partly predatory. Some species are attracted to the fungus smell of Jack-in-the-Pulpit, fall into their inflorescences and accomplish their pollination.

Description

Adult Mycetophilidae sometimes gather in great numbers in various hiding places, under tree roots and holes, and in general they are the most common insects in our forests. However, due to their small size and inconspicuous coloration, they are rarely known or noticed. On the other hand, the larvae of mushroom eaters are known to all, since they form the main population of mushrooms with worms. In addition to the fruiting bodies of cap mushrooms, they also inhabit wood fungi and can be found under the bark of decaying trees. The diet of most larvae is exclusively fungal, but some members of this family are predators. Adults do not cause damage to plants, but lay 2 small eggs on the surface of moist soil (5–8 cm). Larvae, translucent, legless worms with a black "head" measuring 8–10 mm, later emerge from the eggs. The mouthparts are gnawing. The larvae usually develop in soil on decaying plant tissue. However, under indoor conditions they often lack feeding substratum, so they gnaw at tender young roots and underground shoots of plants. This is the main hazard. The occurrence of large numbers of fungal mosquitoes in the garden will lead to an exponential increase in larval numbers, which in turn will result in root damage that leads to yellowing of leaves, loss of energy to the plant and often a significant reduction in garden productivity.

The larvae can also be carriers of diseases that infect plants, in some cases resulting in a total loss of crops. Although fungus mosquitoes are generally more of an annoyance than a threat, their presence should be taken seriously and measures to control and eliminate this pest should be started as soon as possible after detection.

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