ISHS Acta Horticulturae 477: IV International Symposium on Replant Problems
REPLANT DISEASE OF SUGARCANE |
| Authors: | R.C. Magarey, J.I. Bull |
| Abstract:
Sugarcane yield decline (YD), a productivity constraint associated with long term sugarcane monoculture, shows a number of similarities to Apple Replant Disease (ARD). Similar etiologies are suggested by common root symptoms and by alleviation of both conditions by soil application of the fungicide mancozeb. YD is a major production constraint for the Australian sugar industry. Research has identified an oomycete Pachymetra chaunorhiza as a root rotting organism associated with YD; other contributing organisms include nematodes (Pralylenchus zeae, Meloidogyne spp.), and dematiaceous (dark sterile) fungi. Some aspects of the etiology remain unclear. Research with the field application of mancozeb suggests a minimum soil volume needs to be treated before significant growth responses are obtained. Low doses applied through trickle irrigation are being investigated as an economic control for YD. | |
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