ALTERNATIVE TECHNIQUES FOR THE APPLICATION OF SULFUR DUST TO CASHEW TREES FOR THE CONTROL OF POWDERY MILDEW CAUSED BY THE FUNGUS OIDIUM-ANACARDII IN TANZANIA
Dn. Smith et al., ALTERNATIVE TECHNIQUES FOR THE APPLICATION OF SULFUR DUST TO CASHEW TREES FOR THE CONTROL OF POWDERY MILDEW CAUSED BY THE FUNGUS OIDIUM-ANACARDII IN TANZANIA, Crop protection, 14(7), 1995, pp. 555-560
Sulphur dusts are widely used in Tanzania to control powdery mildew on
cashew trees, caused by the fungus Oidium anacardii. Sulphur distribu
tion on mature cashew trees obtained using a motorised backpack duster
, a manually powered backpack duster and a locally developed dusting b
ag were compared. The most efficient application was from the motorise
d duster, although sulphur distribution throughout the canopy of the t
ree was uneven with all three methods. The presence of dew when dustin
g was demonstrated to increase sulphur deposition. Following applicati
on, sulphur deposits on the canopy were found to decline by as much as
80% in 3 weeks.