International Sugar Journal

Weather and scale insect (Melanaspis glomerata) interactions in sugarcane [Full subscriber]

The scale insect (Melanaspis glomerata Green) infestation on sugarcane (cv. Co 6907) in relation to weather factors was examined at the Regional Agricultural Research Station, Anakapalle, India during 2000-2010 in order to predict pest outbreak. The incidence of M. glomerata showed a negative correlation with rainfall and positive correlation with maximum temperature, mean temperature and accumulated thermal time. Mean temperature during 7-12 fortnights after planting (FAP) and rainfall during 1-12 FAP accounted for 64 and 32% variation in M. glomerata incidence individually. Rainfall exceeding 500 mm limited the incidence of scale to approximately 10 per cent and in years with…

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