Articles
BIOLOGICAL ASPECTS OF SCHISTOCERCA PALLENS, STIPHRA ROBUSTA AND TROPIDACRIS COLLARIS GRASSHOPPERS SPECIES AT RIO GRANDE DO NORTE STATE, BRAZIL
Article number
370_12
Pages
83 – 88
Language
Abstract
The Northeastern grasshopper (Schistocerca pallens), the “Mané-magro” (Stiphra robusta) and the “Tucurão” (Tropidacris collaris) are the most important grasshoppers species of economical importance at Rio Grande do Norte state, Brasil.
The S. pallens has been done serious damages to the subsistence cultures as well as to the natives and implanted pastures.
Among the harvests this species has survived by feeding on cashew tree (A. occidentale), “pinhão Branco”, “burra leiteira” or “pinhão bravo” (Euphorbia sp) and “malva branca” or “malva melabode” (Herissantia nemoralis). The S. robusta has also damaged the cashew tree cultures, algarobo (Prosopis sp) and guava (Psidium guayava), while T. collaris damages mostly mango (Mangifera indica) and coconut (Cocus nucifera). The eggs are layed down on the ground, at oothecas form, in variable deeps according to the species.
The hatching is strickly related with the soil humidity, Under adversible feeding and climate conditions the grasshoppers keep themselves at the diapause (quiescence) for variable time.
The S. pallens under inland conditions, was only one generation per year, and remaining at diapause during the adult phase for more than six months.
It’s also possible to associate the outbreaks of S. pallens with rained years followed by drought periods.
The S. pallens has been done serious damages to the subsistence cultures as well as to the natives and implanted pastures.
Among the harvests this species has survived by feeding on cashew tree (A. occidentale), “pinhão Branco”, “burra leiteira” or “pinhão bravo” (Euphorbia sp) and “malva branca” or “malva melabode” (Herissantia nemoralis). The S. robusta has also damaged the cashew tree cultures, algarobo (Prosopis sp) and guava (Psidium guayava), while T. collaris damages mostly mango (Mangifera indica) and coconut (Cocus nucifera). The eggs are layed down on the ground, at oothecas form, in variable deeps according to the species.
The hatching is strickly related with the soil humidity, Under adversible feeding and climate conditions the grasshoppers keep themselves at the diapause (quiescence) for variable time.
The S. pallens under inland conditions, was only one generation per year, and remaining at diapause during the adult phase for more than six months.
It’s also possible to associate the outbreaks of S. pallens with rained years followed by drought periods.
Publication
Authors
M.C.M. Chagas, M.A.B. Moreira, M.F.P. Barreto
Keywords
biology, Schistocerca pallens, Stiphra robusta, Tropidacris collaris
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