SUMMARY OF IMPORTANT POINTS REGARDING 

 OYSTER-SHELL SCALE 



1. The Oyster-shell Scale is complained of frequently by North Caro- 



lina fruit-growers, and its importance as a pest in the State is due 

 to its attacks on the apple, though it may attack a wide variety of 

 other plants (p. 5). 



2. Growers who spray regularly for the San Jose Scale are not seriously 



troubled by it, because the treatments control it (p. 5). 



3. The severity of damage by it varies from almost no damage to the 



killing of individual trees, or in exceptional cases the entire orchard 

 may be killed (p. 8-10). 



4. It is very prevalent throughout all the mountainous section of the 



State, and through the upper Piedmont or "foot-hill" region, and is 

 also recorded in several scattered localities as far eastward as the 

 counties of Mecklenburg, Stanly, Rowan, Davidson, Chatham, 

 Wake, and Granville, and it is believed that on an average it is 

 more severe in the more eastern localities than in the mountainous 

 parts of the State (p. 10). 



5. The winter is passed in the egg stage under the scale of the parent 



female — the eggs hatch most numerously in April, and a spraying 

 to kill the young would be most effectively applied in the latter part 

 of April or early May (p. 13). 



6. Natural enemies aid to some extent in controlling it, parasites and 



predaceous enemies (in cases examined) having killed nearly 14 

 per cent during the winter (p. 15-17). 



7. (a) As to remedies, first choice is given to soluble oils at rate of 1 gal. 



to 8 or 10 gals, water, applied in late winter before the buds 

 open (p. 18). 



(b) Second choice is kerosene emulsion at 25 per cent oil, applied in 

 late winter before buds open (p. 18). 



(c) Third choice is the lime-sulphur washes, either the commercial 

 ready-made ones, or the home-made wash applied in late winter 

 before buds open (p. 18). 



(d) In case the winter treatment can not be given one may use kero- 

 sene emulsion at 15 per cent oil, applied in late April or early 

 May (p. 18). 



8. It is desirable that any dead or useless branches be cut out before 



spraying to control the Oyster-shell Scale. 



