A grass crop such as sweetcorn, which is unaffected by the disease, should be included as part of the rotation. Similarly onions, which are also unaffected by the fungus, may usefully be included in the rotation. Chemical treatments Soil fumigation helps in controlling this disease. Seedlings may also be treated with quintozene. A number of fungicides are registered for use on different crops and some of those current are shown in Table 1 and Table 2 .
Recommendations are current at the time of printing.
Acknowledgements Eleanor Melvin Carter, Research Officer, Division of Horticulture, contributed to this Farmnote. Broccoli benomyl Brussels sprouts benomyl Cabbage benomyl, vinclozolin Capsicum benomyl Carrot vinclozolin Cauliflower benomyl, vinclozolin Celery benomyl, iprodione Kale benomyl Kohlrabi benomyl Lettuce benomyl, dicloran, iprodione, procymidone, vinclozolin Potato vinclozolin Tomato benomyl, dicloran, iprodione, procymidone Table 2.