THE EED SPIDEE ON THE AVOCADO. 



13 



temporarily, as none remained on the foliage to destroy the young 

 on hatching. 



SPRAY ROD VERSUS SPRAY GUN. 



In making a comparison of the spray rod (fig. 9) and the spray 

 gun (figs. 10 and 11) it was found that the latter gave better satis- 

 faction against the red spider. Where an orchardist is short of help 

 considerable benefit can be derived by using the spray gun, as the 

 spray operator can cover the ground much faster than when using 



Fig. 9. — Spraying in an avocado grove with spray rods. 



the spray rod. As the red spider works on the top of the foliage the 

 operator can stand off a short distance from the tree, and with the 

 use of the spray gun can spray from the bottom to the top of the 

 tree by turning the handle of the gun which changes the spray from 

 the fan or fog spray (fig. 10) to a long-distance spray (fig. 11). 



The writer has found that growers in using the spray gun often 

 neglect to change the disk in the nozzle frequently enough and won- 

 der why they can not maintain sufficient pressure while spraying. 

 The operator should watch the opening of the disk in the nozzle of 

 the gun, and should replace it when it is worn. 



