10 
PLATE XV. 
XVI. 
> WAN 
XVIIT. 
XIX. 
XX. 
THE PLUM CURCULIO. 
Benefits of spraying apples for the plum curculio. Fig. 1.— 
Duchess apples from trees in unsprayed plat. Fig. 2.—Duchess 
apples from trees in plat sprayed against the plum curculio with 
arsenate-of lead =... ..... ...'.0-2 36.25 eae 
Conditions favoring the plum curculio. Fig. 1.—Native plum 
thicket in the south, adjacent to peach orchard. Fig. 2.—Woods 
and thicket adjacent to plum orchard, furnishing the beetles 
with excellent hibemation\quarters’)-5->+>5- 22> -eeee eee ee eee 
Effect of arsenical sprays on peach foilage, Arljngton Farm, Va. 
Fig. 1.—Unsprayed or check tree. Fig. 2.—Tree sprayed once 
with commercial arsenate of lead. Fig. 3—Tree sprayed once 
with homemade arsenate of lead. Fig. 4.—Tree sprayed once 
with Paris green. Fig. 5—Tree sprayed once with green arse- 
noid. Fig. 6.—Tree sprayed once with arsenic sulphid.......- 
Arsenical injury to fruit. Fig. 1—Elberta peach sprayed three 
times with arsenate of lead, showing burning and cracking effect 
of the poison. Fig. 2.—Japanese plums, showing burning from 
one application of arsenate:of leads )+ J. 7.22-5-225-seee see. ee 
Field experiments in Georgia for control of plum curculio and 
peach diseases. Fig. 1.—Gasoline power outfit in operation. 
Fig. 2.—Determining results of spraying, each peach being cut 
OPO ')5:54:2 vase he Sees eRe ee a ae en ee 
Size of peaches at time of first spraying with arsenate of lead, show- 
ing on the left the earliest and on the right the latest stages in 
development when this treatment should be given..........-.-- 
TEXT FIGURES. 
Fia. 1. Herbst’s figure of plum curculic, accompanying the original descrip- 
oD ? nV) oD oD 
6.0 Wee 0 il AS 1 Ga eee mR aN “epee Be Boa A PO ae OE Seance, cae ee Bn 
2. An early illustration of the plum curculio, frequently used between 
co 
about 1830'and TebOe ssc ec seco tea cee ate ae ama oe eee eras 
. Peck’s figure of the plum curculio, published with his description 
(CRhynchenasscenasy)) ami llSil 9 eae erecta eee eee eee 
. Map showing by the shaded area the distribution of the plum curculio. - 
2 he plum. courer (Anthonomimus scitel laris) =m a= sae te erie 
a 
5. The apple curculio (Anthonomus quadrigibbus)..--.-.-----+---------- 
6 
7 
. The acorn weevil (Balaninus victoriensis)....-.--.------------------ 
8. Fuller's rose beetle ( Pantomorus fullert) a2. 21 2255 52 as ee eee 
9. Imbricated snout beetle (Epicexrus imbricatus)......-.-------------- 
10. The plum curculio (Conotrachelus nenuphar): Egg...---.------------ 
11. The plum curculio: Larva, showing structural details -..-.---------- 
12. The plum curculio: Head of larva, with parts named.......--------- 
13. The plum curculio: Head of larva, lateral aspect, with parts named. - 
14. The plum curculio: Head of larva, ventral aspect, with parts named. . 
15. The plum curculio: Lateral, dorsal, and ventral aspects of right man- 
dibleof larva, -wathunusecles: 225 .e50ee eee eee eee eee eee ee 
16. The plum curculio: Dorsal aspect of maxilla and labium of larva, with 
Parts MAME <. <2. 6 66 oe cied a ote eee eee eee 
17. The plum curculio: Pupa, showing structural details........--.------ 
18. The plum curculio: Mouth parts of the adult...............--.----- 
19. Black-knot of plum, showing, on the left, infestation by plum- 
curculio larvise <o..daede cues oa seen ce Oe OO Ee eaeececeeaae 
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