| [incidence and damages inflicted by simuliid flies in the gdr district of schwerin]. | systematic faunal studies in the district schwerin showed at the present time there are 3 more or less damage-biotopes existing in the districts of perleberg, ludwigslust and parchim; 5 river sources can be considered as potential sources, 5 are temporary and 2 are ephemeral whilst in 3 further areas environmental influences such as effluent impairs the flow of the river and the developmental stages of simuliidae were not observed.--the following species were found: boophthora erythrocephala, wi ... | 1976 | 1267220 |