569 



Hartenbower (A. C). Report of the Agronomist in Charge.— Rept. 

 Guam Agric. Expt. Sta., 1916, Washington, D.C., 3rd August 1917, 

 pp. 1-40. [Received 5th October 1917.] 



The most serious pest of tobacco in Guam is Heliothis obsoleta (boll- 

 worm), which feeds on the leaves and buds, reducing the yield and the 

 quality of the leaves by perforating them. The experiment of 

 sprinkling the terminal buds and upper leaves once a week during the 

 growth of the crop with a mixture of seven parts maize flour and one 

 part powdered lead arsenate gave good results, the yield of perfect 

 leaves rising from 9 to 12 per cent, in unshaded plants, and from 

 10 to 29 per cent, in shaded plants. 



Radishes were seriously attacked by Hellulu undalis (cabbage web- 

 worm), especially during the dry weather, every planting made from 

 27th December to 1st April being completely destroyed. Spraying 

 with lead arsenate against this insect proved effective only on fertilised 

 plots. 



BoRDAS (M. L.), Ponte du Rhynchite coupe-bourgeon {Rhynchites coni- 

 cvs) et Anatomie de sa Larve. [Oviposition of Rhynchites conicus 

 and the Anatomy of its Larva.] — C. R. Hebdom. Acad. Sciences, 

 Paris, clxv, no. 2, 9th July 1917, pp. 70-73. 



Rhynchites conicus is a small weevil that attacks the buds and 

 young shoots of apple, pear, cherry and peach trees, boring a 

 perpendicular gallery below the point of insertion of a leaf or of an 

 axillary bud, and depositing in it two or three eggs. As a result of 

 this injury, the terminal part of the shoot dries up and blackens and 

 the with ered buds, fall. The larvae eat away the medullary and inner 

 cortical region of the bud, which thus becomes easily detached 



Gafanhotos no Amazonas. [Locusts in the State of Amazonas.] — 

 Chacaras e Quintaes, S. Paulo, xvi, no. 2, August 1917, p. 117, 

 1 fig. 



Schistocerca paranensis, Burm., is recorded for the first time as 

 having caused serious injury at Manaos, which is much farther north 

 than the Brazilian territory hitherto infested by this locust. 



Les Ravages des Chenilles de Pi6rides sur l9s Cruciferes. [The Ravages 

 of Pieris caterpillais on Crucifers.] — Bull. Sac Elude Vulg. Zool. 

 Agric, Bordeaux, xvi, no. 9-10, September-October 1917, 

 pp. 108-110. 



Pieris hrassicae. L., P. ra-pae, L., and P. napi, L., have caused great 

 loss to market-gardeners throughout the south-west of France bv their 

 attacks on cabbage, kohl-rabi and other Cruciferae. P. hrassicae was 

 especially abundant in August, and it was feared that these attacks 

 would recur during October when the second brood of larvae hatch. 

 These butterflies have a number of natural enemies, including various 

 birds, a Tachinid fly, Exorista indgaris, Fall., a Chalcidid, Pteromalus 

 puparmn, L., and a Braconid, Apanteles {Microgaster) glomeratus, L. A 

 bug, Nabis lativentris, devours the eggs and larvae. The usual control 

 measures, including hand-picking and crushing the eggs and cater- 

 pillars, arsenical, nicotine and pyrethrum sprays and powder-sprays 



(C423) o 



