CONTENTS 



Page 



III ■ roduction 5 



Scope of the work 6 



Orchard conditions in the (Jzarks , 6 



Plan of work 7 



Bitter-rot 7 



Injury 7 



Description 8 



The cause 9 



Canker 9 



Climatic influences 9 



Demonstration spraying for l>itter-rot in Arkansas 10 



The treatment , 10 



The results .' ./ 10 



Cost of treatments 13 



Recommendations 14 



Apple blotch 14 



Occurrence 14 



Destructiveness 15 



Description 15 



Period of infection 16 



The cause 16 



Demonstration spraying for apple blotch in Arkansas 17 



The treatment 17 



The results 17 



Recommendations 18 



Leaf-spot diseases 18 



The cause 19 



Residts of treatment 19 



Recommendations 20 



Apple scab 20 



Injury 20 



Description 20 



The cause 21 



Results oi treatment! 22 



Recommendations 23 



The codling moth 23 



Character of injury 23 



Description and life history 24 



How the insect passes the winter 24 



■ The moth 25 



The egg .' 25 



The larva ^ 26 



The pupa 26 



Generations of the insect , 27 



283 



(3) 



