231 



OsKAMP (J.) & Woodbury (C. C!.)- Peach Growing in Indiana. — 

 Purdue Univ. Agric. Expt. Sta., La Fayette, Ind., Circ. no. 69, 

 Ssptember 1917, 24 pp., 15 figs. [Received 21st March 1918.] 



Insects injurious to the peach are the curculio beetle [Conotrachelus 

 nenuphar], the black peach aphis {A. persicae-nigcr) and the peach 

 tree borer [Aegeria, exUiosa]. 



The curculio which oviposits in the young fruit, causing it to become 

 knotty and exude gum, may be controlled by spraying with lead 

 arsenate at the rate of 2 lb. paste, or 1 lb. powder, and 2 lb. lime to 

 50 U.S. gals, water. 



In cases of black peach aphis infestation the under-sides of the 

 leaves should be thoroughly sprayed with 1 pint of 40 per cent, nicotine 

 sulphate to 100 gals, water. 



The peach-tree borer can be successfully dealt with only by the 

 method of worming, or cutting out the larvae from the trunk, during 

 August and September. The operation may be sim]:)lified by moimding 

 up the earth at the base of the trees before egg-laying begins in June, 

 thus compelling the larvae to enter the trunks at a higher level, where 

 they can be more easily reached. 



DEN Doop (J. E. A.). Lasiodermu en Anobium in Koriander- en Kar- 

 wei-Zaden. [Lasioderma and Anobium in Coriander and Carawav 

 Seed.] — Meded. Deli Proefstation, Medan, x, no. 8, December 

 1917, pp. 190-202. [Received 20th March 1918.] 



As a result of the circular drawing attention to coriander {Corian- 

 druni sativum) and caraway {Carum carui) as hosts of Lasioderma 

 serricorne [see this Review, Ser. A, v, p. 417], 88 samples of coriander 

 and 85 of caraway were received from 54 estates. Of these, 19 of 

 coriander (22 per cent.) and 44 of caraway (52 per cent.) were infested 

 with L. serricorne. In the 88 coriander samples, 38 individuals of 

 L. serricorne were found (0'4 per sample) and 468 in the 85 samples 

 of caraway (5 '5 per sample). Of the 54 estates, 33 per cent, suffered 

 from infested coriander and 63 per cent, from infested caraway. The 

 number of estates where L. serricorne occurred — in either or both 

 seeds — was 78 per cent. In 41 per cent, of these caraway alone was 

 infested. The greater attractiveness of caraway seed is therefore 

 apparent. 



There does not appear to have been any direct relation between 

 the infestation of these seeds in a given estate and the infestation 

 of the same estate's tobacco crop in 1916. This does not imply that 

 these seeds may not be dangerous, as the presence of any Lasioderma 

 beetles near the tobacco miy start an infestation. Two other products, 

 however, are still more important sources of infestation. The first 

 is the tobacco which the work-people bring with them into the ferment- 

 ing and sorting sheds, while the second is the dried root of Curcuma 

 longa, used as a medicine, dye-stuff and spice. This latter is highly 

 attractive to L. serricorne and favourable to its development. As 

 coriander and caraway are usually stored in separate divisions of 

 the same box together with this root, it is probable that they become 

 infested from it and the data collected seem to confirm this. 



In examining the samples it was found that the injury done by 

 L. serricorne to these products was unimportant compared with that 



