NOTA
Efeitos climáticos na ocorrência de Orthezia insignisBrowne, 1887 (Homoptera Ortheziidae) em cafezais do Paraná
Climatic effects on the occurrence of Orthezia insignis Browne, 1887 (Homoptera Ortheziidae) as coffee pest plantations in Parana state
Octavio Nakano; José Roberto Postali Parra* * Com bolsa de suplementação do C.N.Pq. ; Antônio Roberto Pereira* * Com bolsa de suplementação do C.N.Pq.
SUMMARY
The occurrence of the scale O. insignis as coffee tree pest was first noticed in 1970 attacking plantations in Parana State. The peculiarity of this occurrence was that it disappeared one month later without any insecticide control. We tried to explain that fact based on climatological records: rainfall, air temperature and water balance estimation (fig. 1A and B). This scale needs a dry period with high temperature to become a pest. This condition occurred only one time in six years (1964 1969). Other periods without rain had low temperature as limitant factor; or, when there was high temperature the limitant was rainfall. So we can say that, climatically, the probability of occurrence of O. insignisas a pest is very low.
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Recebida para publicação em 18 de outubro de 1974.
Datas de Publicação
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Publicação nesta coleção
16 Mar 2009 -
Data do Fascículo
1975
