188 THE PLUM CURCULIO. 
Taste XCII.—Tests of killing effect of various arsenicals on the plum curculio on peach, 
Georgia, 1910. 
Beetles dying from each of the arsenicals. 
. . A . Arsenicals used without 
Arsenicals used in self-boiled lime sulphur. lime sulphur. 
Dates of death of beetle. | 3 che | ick: a = Bop ira BS £ 3 2 alege 
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mw | @=| 88) 86) 92) ba) eo) Ss” | eee eae 
2\ 218 |2 |@ |Seise a (8 12 |sale 
GS fod. | md fet ee | eo ee 
Maya) st oe een Sets 2 A eas, 11 2 11 3 1 7 3 1 
See cee Aa Serie saree |= sete 5 4 | 3 8 2 ft Bulseoeee 1 16 6 
ae a ae Peete 1 6 3 1 it 5 15 8 2 1 3 3 
eee As eee a Woca ac 7 4 | 3 5 12 8 7 5 1 2 3 
eee Rasen ss saa ecrsrne 11 5 10 2 9 1 20 2 4 1 5 
pop ene 5 See 1 9 9 10 8 8 3 6 8 9 8 4 
SIA aS aca aoe ecaae 3 3 2 5 1 1 Se 1 4 9 4 
ee Se een Herc se 2 1 7 1 3 1 1 4 2 5 10 
(US eae ce naan Soe aiseocdac 4 2 1 Pees ae 1 1 1 2 4 1 4 
3 Si |acseme in| BAe Soe aoe 5 1 2 3 
2 3 1 Uh Bet ese Paeese 4 BA Beene 3 
6 1 1 Bae Resse Meeenn Base c|oo5accleoaccc 1 
2 1 
2 
A feeding test was made with beetles in lots of 50, using twigs 
bearing fruit and foliage from sprayed trees in the orchard, except 
in case of lot 6, where foliage had been removed. Trees were sprayed, 
April 4 and 5, with arsenate of lead at the rate of 2 pounds to 50 gal- 
Ions of water, and feeding tests started April 5, except with lots 7 
and 8, which were started April 7. It will be noted that all the 
beetles on the sprayed branches were killed within about a week, 
except lot 6, where fruit only was present and the period was length- 
ened. (See Table XCIII.) 
