408 



Insect Pests. 



TREATMENT FOE WHITE SCALE. 



Three things seem to be done by growers in this country : 



(1) Spraying or dipping in warm water ; never over 130" F., best 

 at 115 F. 



(2) Treating with paraffin emulsion. 



FIG. 273. 1'INEAl'PLE SCALES. 



1. Diaspiis bromeliif d x 25 ; -2, adult female X 35); 3, puparium of adult 

 female x 2!) : 4. A>>j>idiotu# bromelin', puparium of adult female (X 25) ; 

 5, puparium of male, X -20). 



(After Xeu-stead.) 



(3) Placing the affected plants, head downwards, over a bed of 

 fermenting horse clung in a closed frame for an hour, and then taking 

 the plants out and washing in plain water. 



