Crop protection
Bacterial diseases
	Common scab of potatoes There has been a lot of controversy on the importance of common scab on seed potatoes. The standard assumption is that common scab on seed is an important source of contamination of fields.  (Read more...)
Fungal diseases
	Verticillium wilt of potatoes Contrary to the common occurrence of Verticillium wilt on tomatoes and cotton in South Africa, only a few positive cases on potatoes were reported in South Africa before 1994.  (Read more...)
Insects
	Potato leafminer and potato tuber moth Research is being done on Liriomyza huidobrensis, (the pea leafminer) or as it is now known in South Africa, the potato leafminer.  (Read more...)
Nematodes
	Nematodes ARC-VOPI has been involved in nematode trials for many years, especially root-knot nematodes on tomatoes.  (Read more...)
Viral diseases
	Viral diseases The Virology Section is responsible for the identification and characterization of viral diseases of potatoes, vegetable and ornamental crops. It also develops detection system and control strategies for important viral diseases.