106 SOME SOUTH INDIAN INSE< rs, ETC. CHAP. XI. 



canes have become established. A saturated solution in cold water 

 ol harm the setts if these arc healthy ; but it they have been 

 brought from a distance or are not quite freshly cut a solution at 

 half the above strength should be used. 



Wliitewash by itself, when applied to the trunks and limbs of 

 trees, has some valu< as a repellent and fungicide and also 

 prevents sun-scorch. Quicklime is slaked with water, thoroughly 

 mixed, and strained before use. In the case of permanent crops 

 such as coffee and rubber, the scraping (if necessary) and white- 

 washing of the bases of the stems helps to repel boring beetles, 

 and an a dm i \turc o1 Lead Arsenate or similar stomach poison with 

 the whitewash would probably check the attacks of porcupines on 

 young rubber ti i 



Spraying Machinery. 

 For the application of insecticides, use is generally made of 

 some form of machine which delivers the insecticidal substance 

 under pressure as a line mist or spray. Such machines are there- 

 fore called "sprayers" in the case of those which are used with 



•ST 



V 



■ «ZS 



■■aw**-. W? 



, I. Applying powdered insei ticides by hand with the aid oi cloth 

 \< ,ti li >ur oi the powdered leai paj ed 



with the unpowdered leaves on the right. I Vuthor' ori| in il pi 



liquid insecticides, and "blowers," " bellows " or " powder guns" 

 in the cases of machines which are used for the distribution of dry 

 insecticides in powder form. The latter type of machine is not 

 much used in India, except in the case of a leu special permanent 

 crops, such as tea, and for ordinary agricultural work powders can 

 usually be distributed onto plants quite satisfactorily with the 



