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% of trees Management • Earlier trials involved use of copper based fungicides • Trials were later set up with locally selected materials and those obtained from Newzealand • Monitored for disease severity. • Found the level not to affect growth to a big extent • Planting restarted 50% 40% 30% 20% 10% 0% Fig. 3 Percentage of trees in various disease scores- Kaptagat plot 1 2 3 4 5 Disease score March June
Powdery mildews • Can occur in the nursery or field • Affect the leaves • Cause stunted growth and leaf fall of trees • Symptoms- whitish appearance on surface of leaves.
Page 1 and 2: Diseases of forest trees in Kenya B
Page 3 and 4: Leaf spots • Found in nurseries a
Page 5: Symptoms P. radiata and P. patula P
Page 9 and 10: Botryosphaeria canker • The most
Page 11 and 12: Diplodia pinea (Sphaeropsis sapinea
Page 13 and 14: Armillaria root disease • Attacks

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