ABSTRACT. Integrated pest control of Simulium (Diptera, Simuliidae) with Bacillus thuringiensis and mechanical handling in creek and pisciculture spillway, Almirante Tamandaré, Paraná, Brazil. At Riacho dos Padres, Chácara Evíssima, a small agribusiness venture featuring fish, poultry and cattle farming; a recreation outdoor facility and Event Hall, ubicated in Curitiba's Metropolitan Area, simuliid populations boast high proliferation rates, delivering serious impact to local people with their noxious bites, to such an extent as to impair the daily meetings of people. From January to August 2002, 24,021 pupae were collected from which the following species and respective frequencies were identified: Simulium inaequale (55.24%), Simulium perflavum (16.81%), Simulium pertinax (13.93%), Simulium orbitale (8.03%), Simulium subnigrum (4.92%), Simulium distinctum (1.03%) and Simulium incrustatum (0.04%). Local pest control measures were carried out from the February 28 to August 8, 2002. Main integrated pest control measures taken consisted in the application of biopesticide Bacillus thuringiensis israelensis (Bti) and mechanical handling, not only by removing the immatures (eggs, larvae and pupae) by means of drain brushing, but also by removing natural and artificial substrates from the bed. Larval mean density, monitored at artificial polythene strips substrates (area 13,500 cm 2 ), averaged 6.7 and 11.5 larvae/cm 2 before the application of Bti at the creek bed extension 75 m and on the dam spillway, respectively. Larval mass reduction at creek bed and at the spillway with application of Bti from 1.77 to 2.09 mg/litre of active ingredient for one minute exposure time and means of mechanical handlings monitored at polythene strips substrates (area 20,250 cm 2 ) varied, respectively from 72.61% to 99.97% and from 74.91% to 99.45 with outflows from 0.39 to 0.45 and from 0.38 to 0.43 m 3 /minute. At the one of the dam spillways with area of 5,110 cm 2 , average larval density in the first mechanic handling was 10.27 larvae/cm 2 . However, at this spillway, larval reduction by means of mechanical handlings was from 53.81% to 99.59%. Integrated pest control did down sized the number of bytes to the level wished, thus obtaining the positive effect aimed. KEYWORDS.Control Bti; mechanical handling; creek; pisciculture spillway dam; Simuliidae. RESUMO.No Riacho dos Padres na Chácara Evíssima, numa microempresa de agronegócio com criação de peixes e animais domésticos, área de lazer e salão de eventos, localizada na Região Metropolitana de Curitiba, os simulídeos em grande proliferação causaram sério impacto com as picadas a tal ponto que dificultaram o convívio habitual. De janeiro a agosto de 2002, coletou-se 24.021 pupas por meio das quais foram identificadas as espécies: Simulium inaequale, Simulium perflavum, Simulium pertinax com 85,98% e Simulium orbitale, Simulium subnigrum, Simulium distinctum e Simulium incrustatum com somente 14,02% de freqüência. O combate a estas populações iniciado em 28 de fevereiro terminou ...

ABSTRACT. Survey of the Simulium species (Diptera, Simuliidae), Riacho dos Padres, Almirante Tamandaré municipality, Paraná, Brazil. From January to August 2002, collections of simuliid larvae, both in natural and anthropic substrates, were carried out biweekly in Riacho dos Padres. This study provides a local inventory of species and their relative frequencies. The area is a private property located in the Curitiba metropolitan area, and it is dedicated mainly to farming fish, rabbits, sheep, cattle, poultry and also featuring recreational activities for visitors such as horse back riding. The constant presence of vertebrate hosts and food given to the fish provided a constant supply of food resources, thus leading to a local explosion of this insect nuisance. A total of 24,021 pupae and 197,812 larvae were collected on all kinds of substrate. From the pupae, the following species and respective frequencies were identified: Simulium inaequale (55.24%), Simulium perflavum (16.81%), Simulium pertinax (13.93%), Simulium orbitale (8.03%), Simulium subnigrum (4.92%), Simulium distinctum (1.03%) and Simulium incrustatum (0.04%). The total number of larvae colonizing all substrates was also computed. KEYWORDS. Breeding ground;Simulium; species frequency; stream. RESUMO.De janeiro a agosto de 2002, quinzenalmente, foi levada a efeito a coleta de simulídeos imaturos em substratos naturais e antrópicos no Riacho dos Padres. O trabalho visou proceder ao inventário das espécies e verificar as freqüências relativas. A área de propriedade particular localizada na Região Metropolitana de Curitiba constitui uma microempresa de agronegócio, com criação de peixes, coelhos, ovinos, bovinos, aves domésticas e, ainda, área de lazer com eqüinos para cavalgada de visitantes. A presença constante de animais hospedeiros e a ração fornecida aos peixes garantiram farta alimentação aos simulídeos, o que favoreceu a explosão desta praga. Em todos os substratos foram coletadas 24.021 pupas e um total de 197.812 larvas. A partir de pupas, foram identificadas com as seguintes freqüências: Simulium inaequale (55,24%), Simulium perflavum (16,81%), Simulium pertinax (13,93%), Simulium orbitale (8,03%), Simulium subnigrum (4,92%), Simulium distinctum (1,03%) e Simulium incrustatum (0,04%). Verificou-se também a quantidade de larvas que colonizaram todos os substratos.

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