1 68 CROP PRODUCTION 



Place a few currant worms in a tumbler and feed with 

 leaves to rear the larvae and see the changes they 

 undergo. 



Watch for weak canes in spring. Cut open to see if 

 they are hollowed out by the cane-borer. Remove and 

 burn affected canes. 



Fungous Diseases 



Find leaves affected by leaf-spot. See how the green 

 part is injured by the spread of the fungus. 



See whether spotted leaves drop off before the healthy 



