INSECTS, FUNGI, PLANT DISEASES, ETC. 



145 



Besides the San Jose scale and the oyster-shell bark 

 louse there are other scales which are destructive to fruit 

 and other trees iu the South. Among the number may be 

 mentioned the scurfy bark louse (Chionaspis furfurus, 

 Fitch); the greedy scale (Aspidiotus camelliac, Sign.); the 

 English walnut scale (Aspidiotus juglans-regiae, Corns.); 

 the new peach scale 

 Mor- 



(Diaspis lanatm 

 gan & Cock.). 



Remedies. — Two of 

 our common orchard 

 scales, viz., the scurfy 

 bark louse and the 

 oyster-shell bark louse, 

 hibernate in the egg 

 state, and their hatch- 

 ing is comparatively 

 uniform. The approxi- 

 mate date throughout 

 the middle belt of the 

 country is from the 

 middle to the end of 

 May. Moreover, the 

 larvae are compara- 

 tively slow to settle, 

 and the scale at first 



Fig. 49 — San Jose Scale, a, Young larva, 

 greatly enlarged. I>, Antenna of same, 

 still more enlarged. Howard, Div. 

 Ent. Cir. 3, U. S. Dept. Agri. 



is not very dense. Therefore, 

 one, or, at the most, two applications of kerosene-soap 

 emulsion, diluted with ten parts of water, made about the 

 first of June, will hold these two species well in check. 

 (Howard.) 



San Jose Scale (Aspidiotus gerniciosus, Comst.).— This 

 is one ot the most destructive insects which attack the 

 apple. It is becoming very widely spread throughout the 

 United States, and when it finds lodgement in an orchard 

 heroic measures are required to eradicate the pest. Great 



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