228 



States. The Longicorn beetle, Chion cinctus, Drury, cannot be con- 

 sidered a serious pest, provided that all dead and dying wood is 

 promptly removed and destroyed by burning, this being also the best 

 means of controlling Elaphidion villosum, F. (oak pruner), the larvae 

 of which amputate the branches by gnawing a circular groove in the 

 wood, leaving only the bark intact, so that they are brought down 

 by the first strong wind, or even by their own weight. 



Turner (W. F.). Pecan Insects. — Georgia State Board Entom., Athnta, 

 Bull. no. 49, January 1918, pp. 1-37, 11 plates. [Received 21st 

 March 1918.] 



The greater part of the subject matter of this bulletin has already 

 been noticed [see above], but the following additional species are 

 dealt with : — Moths of the genus Catocala, the larvae of which are 

 usually present only in April and May, when they may be controlled 

 by handpicking, arsenical sprays, or burlap bands ; Xyleborimis 

 (XyJeborus) pecanis, Hopk. (pecan ambrosia beetle), which attacks 

 trees only when in an unhealthy condition, the removal and burning 

 of wood so attacked being a necessary measure ; Aegeria {Synanthedon) 

 geliformis, Walk, (lesser pecan-tree borer), which does not cause any 

 material injury ; Conotrachelus juglandis, Lee, a weevil, the life-history 

 and control of which have not yet been worked out ; and Diplotaxis 

 excavata, Lee, a leaf-feeding beetle which, if present in sufficient 

 numbers, can be controlled by spraying on its first appearance with 

 lead arsenate at the rate of 3 lb. paste, or 1| lb. powder, to 50 U.S. 

 gals, water. 



Chase (W. W.). Helpful Hints on Dusting Peaches. — Georgia State 

 Board Entom., Atlanta, Circ. no. 24, January 1918, 7 pp. 

 [Received 21st March 1918.] 



A dust mixture suitable for spraying peach trees for the prevention 

 of brown rot, peach scab and the attacks of curculio [Conotrachelus, 

 TienupJiar] must contain superfinely ground sulphur and lead arsenate. 

 A third ingredient, hydrated lime, serves several useful purposes, in 

 that it improves the physical properties of the mixture by eliminating 

 the lumps that occur in mixtures of sulphur and lead arsenate, thus 

 allowing the mixture to flow more uniformly from the nozzle. Being 

 cheap, it reduces the cost by displacing the more expensive sulphur, 

 the injurious effect of which it also tends to neutralise. 



The proportions of these materials must depend entirely on the 

 number of dustings that are to be given, a higher percentage of sulphur 

 and arsenic being required in a mixture that is to be applied once 

 only. For varieties of peach that require only one application a 

 mixture may be used having the composition sulj^hur 80 per cent., 

 lead arsenate 10 per cent., hydrated lime 10 per cent., which is also 

 suitable for those varieties that need a second dusting 3-5 weeks 

 after the first. When three dustings are necessary, the first should 

 consist of sulphur 10 per cent., lead arsenate 5 per cent., hydrated 

 Hme 85 per cent., to be followed 3-5 weeks later, and again 5 or 6 

 weeks before the ripening period by one having the composition 

 sulphur 80 per cent., lead arsenate 5 per cent., hydrated lime 15 per 

 cent. 



