A. G. Kojevnikova

Tashkent State Agrarian University

The article presents materials on the study of the cicadas Laodelphax striatellus Fall. and Muirodelphax aubei Perr.in the Fergana Valley, their morphological and biological characteristics, systematic position, distribution, harmfulness, food connections and peculiarities of their diagnosis. As I.D. Mityaev points out [1], the useful value of cicadas for humans is very insignificant. There is evidence that some peoples eat large singing cicadas, considering them medicinal, or keep cicadas in cages for the sake of their peculiar singing. It is proved that some species of cicadas, in places of their mass reproduction, play a significant role in the permeability of moisture and aeration of the soil, the underground work of their larvae. Larvae and imago of cicadas are a source of food for many animals and they play a certain role in biocenoses. Some species, due to their low abundance and low harmfulness, are not of great practical importance for humans. Most of the cicadas are pests of various agricultural plants [2, pp. 146-150]. As noted by D.A. Azimov, without deep knowledge of the fauna and development of the taxonomy of insects, as well as other groups of fauna and vegetation, it is impossible to solve further problems of protection and rational use of useful forms, as well as organization of plant protection [3, pp. 54-55]. Therefore, the study of cicadas and their diagnosis is not only theoretical, but also practical.

Cicadas, species, composition, family, genus, species, Laodelphax striatellus Fall, Muirodelphax aubei Perr., diagnosis.

1) Mityaev I.D. (2001) Cicadids of Kazakhstan (Homoptera, Cicadinea). - Publishing house “Science”. – Alma-Ata: - p. 56.

2) Kozhevnikova A.G. (2000) Cycadids (Auchenorrhyncha) are pests of agricultural crops in Uzbekistan. Diss. Doctor of Biological Sciences: 03.00.09. – Tashkent: - pp. 146-150.

3) Azimov D.A. (1993) (edited) Insects of Uzbekistan. - Publishing house “Fan”. - Tashkent: - pp. 54-55.

4) Dubovsky G.K. (1966) Cicadaceae (Auchenorrhyncha) of the Fergana Valley. - Publishing house “Fan”. – Tashkent: - p. 215.

5) Yakhontov V.V. (1953) Pests of agricultural plants and products of Central Asia and their control. - Publishing house “Gosizdat”. – Tashkent: - p. 286.

6) Sulaimanov Kh.A. (1972) Tsikadovye Karshi steppe // Coll. Ecology and biology of animals in Uzbekistan. – Tashkent: - p. 45.

7) Bey-Bienko G.Ya. General entomology. - Publishing house “Higher school”. - Moscow: - pp. 193-194.

8) Kozhevnikova A.G. (2009) Cicadaceae (Auchenorrhyncha) damaging grain crops in the farms of the Andijan region // Materials of the scientific conference. “Actual problems of entomological science”. – Tashkent: - p. 79.

9) Kozhevnikova A.G. Cycadids (Auchenorrhyncha) are pests of agricultural crops in Uzbekistan. Monograph. - Publishing house “Fan va texnologiyalar”. – Tashkent: - pp. 101-103.

VOLUME 04 ISSUE 11 NOVEMBER 2021