I have tomatoes planted in a raised bed. We used a mix of fish compost and topsoil. The plant stems were buried with all but top leaves removed. In the bottom of each planting hole I put shredded newspaper which had been soaked in seaweed fertilizer. they have been kept well watered, and have fertilised alternately with 'tomato food' and seaweed fertilizer. the plants are sturdy and healthy looking with lots of foliage. Problem-last week or so-some leaves have started curling lengthwise. There is no sign of bug damage. I planted two types of tomato-determinate and indeterminate. Only the shorter type have the curled leaves. The other taller bushier type are okay. I am not sure which one is determinate-maybe the smaller ones? All the plants are enclosed in cages. Why are the leaves curling? I have checked my garden books, and the only explanation is a possible virus. Any ideas, suggestions are welcome. By the way I am on the Southern Gulf Islands.