CHAPTER VIII 



THE GENERAL SYMPTOMS OF INSEOT 

 AND MITE ATTACK 



The presence of insects is generally easy to detect, 

 and where the damage done is suspected to be of 

 insect origin search should be made diligently to 

 discover their presence. 



The common symptoms of insect attacks are : 



I. Symptoms prodttoed by Biting Insects 



1. Clean-cut holes in the tissues : caterpillars, 

 larvae of sawflies, grubs, beetles, cockroaches, 

 crickets. 



[N.B. — Other causes for such holes are : 

 (a) Attacks of slugs or snails, when usually there 

 wiU be slimy tracks on or near the damaged 

 areas, and of woodlice. 

 (6) The results of attack of shot-hole fungi, when 

 the hole is usually surrounded by a brown 

 corky line. 



110 



