Influence of Sun Radiation on the Distribution of Anopheles hyrcanus Larvae under Conditions of Rice Fields
Doklady Akademii Nauk SSSR 33(2): 166-169
ISSN/ISBN: 0002-3264 Accession: 013403601
An account is given of observations in Uzbekistan in 1938 on the effect of sunlight on the distribution of larvae of Anopheles hyrcanus, Pall., and of various species of algae in rice-fields. It was found that there were fewer algae and somewhat fewer larvae, especially of the first three instars, in zones that were artificially shaded to exclude any direct rays. Larvae, particularly those of the fourth instar, and pupae could withstand a higher amount of shading than that afforded by the kinds of rice grown in the district.