Evaluation of tomato germplasm for resistance to geminiviruses in Guatemala

Disease Severity Index (DSI), Scale = 0 to 4

	0) no symptoms
no image, yet	1) may be, but not certain
no image, yet	2) certain of symptoms, but they are mild
	3) moderate stunting, serve leaf symptoms
	4) extremely severe symptoms; plants are very stunted and have severe leaf symptoms

[Breeding tomatoes for resistance to geminiviruses in Guatemala]