Basic principles of crop protection - presented by Dr Mariette Truter
54:21
Plant Disease Management Lecture
26:47
Introduction to Plant Diseases of Field Crops (1/5)
18:35
Progress on biological control of invasive alien plants in South Africa - by Dr Roger Price
8:06
10 Common Tomato Diseases
14:42
Celebrating 62 years of Plant Health and Protection
10:35
Soil Science Introduction
33:58
Raising Organic Duck - Collecting Duck Eggs - Cheap Feed Production for Ducks.
11:23