Further studies on epidemiological factors influencing control of banana bunch top disease, and evaluation of control measures by computer simulation
1987
Allen, R.N. (New South Wales Dept. of Agriculture, Wollongbar (Australia). North Coast Agricultural Inst.)
The basic infection rate of bunchy top disease in established bananas averaged 0.0342 new infections per infectious plant per day, but varied seasonally with a maximum in summer. The mean distance of spread for the aphid vector was 15.2 m. The latent period was 59.8 days and correlated with the time required for the growth of 3.7 new banana leaves. A microcomputer program was written to simulate spread of banana bunch top disease. When disease control was maintained by removing diseased plants whenever the number of infected plants exceeded a given threshold, the numbers of diseased plants detected each inspection were positively correlated with the infection threshold, but the numbers of inspections required to maintain control increased markedly as the infection threshold was decreased. Control can be achieved by removing diseased plants, with successive inspections being made before the growth of four additional leaves.
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