SCALE INSECTS IN GREENHOUSES. 





1^1^ 



^f 



Fig. 2578. Mealy Bugs. 

 (a) Destructive Mealy-bug ; (b) Long-threaded Mealy-bug ; (c) Eggs in Cottony Sacks. 



next. The soft scales, or lecaniums, are layers. The eggs are produced in large 



frequently quite troublesome to greenhouse numbers under the scale. Perhaps the most 



and indoor plants. They may be readily common lecanium of the greenhouse is the 



recognized by their oval-shaped bodies, oleander scale (lecanium oleae). Fig. 2579 



Most of them are oviparous, that is, tgg- shows the form of the scale and the way the 



Fig. 2579. A Sokt Scale on oleander, (a) Mature females with young escaping from beneath 

 scale; (b) flat male scale; (c) arrangement of scales along mid-rib of leaf. 



