408 



Insect Pests. 



TliEATMEXT rOl! WlIITE ScALE. 



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



(1) Spraying or dipi)ing iu warm water ; never over 130" F., best 

 at 115° F. 



(2) Treating with paraffin emulsion. 



FIG. 273. — ]'INEA1>PLE SCALES. 

 1. Diaspis bromeliie d (X 35 ; -j, adult female ;x 35); 3, puparinm of adult 

 female iX 29) ; i, AspidMns hrome/i.-v, puparium of adult female (X 25) ; 

 5, pupaiium of male, ( x M). 



(After yeivfifead.) 



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

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

 the plants out and wasliing in ])hain water. 



