381 



The principal factors in 'the natural control of A. grandis are: 

 (1) climatic conditions, especially heat and drought in summer, which 

 cause a mortality of 25 per cent. ; (2) predaceous insects, principally 

 fire ants [SoJenopsis geminata], which destroy 16 per cent. ; (3) plant 

 proliferation, i.e., the rapid growth of new cell-tissue after an injury, 

 often resulting in the crushing of the newly-laid eggs, \2\ per cent, 

 being thus destroyed ; (4) parasites, which however are not to be 

 depended on, as they destroy only 4 per cent. The help of birds is a 

 welcome, but not dependable natural factor in boll-weevil control. 



Two other weevils often mistaken for A. grandis are the cocklebur 

 weevil \^B(iris transversa. Say] which breeds in cocklebur, and the 

 ragweed weevil in ragweed, while the boll- weevil breeds only in cotton 

 squares and bolls. 



Starcher (G. C), Peltier (G. L.) & Hinds (W. E.). Common 

 Orchard Pests and their Control. — Alabama Polytec. Instil., 

 Auburn, Exten. Serv. Circ, no. 7, March 1917, 16 pp. [Received 

 26th June 1917.] 



This circular contains a condensed spraying calendar for apple 

 orchards, and for insect pests of the peach, plum and cherry. The 

 usual controls for San Jose scale [Aspidiotus perniciosus], plum 

 curculio [ConotracJielus nenuphar], codling moth [Cydia pomonella] 

 Aphids, borers and bark-beetles are given, with formulae for lead 

 arsenate, nicotine and lime-sulphur washes, and a dilution table for 

 dormant and summer spraying with concentrated lime-sulphur, 

 hydrated lime-svilphur and Bordeaux mixture. 



Hinds (W. E.). Cucumber and Cantaloupe Insect Control. — Alabama 

 Expt. Sta., Auburn, Farmers' Exteii. Service Leaf., no. 17, [n. d.], 

 1 p. [Received 26th June 1917.] 



The chief insects attacking cucurbitaceous crops are the striped 

 cucumber beetle [Diabrotica vittata] and the 12-spotted cucumber 

 beetle [D. soror], which are controlled by applying air-slaked lime or 

 ashes mixed with powdered lead arsenate at the rate of 1 lb. to 10 lb. 

 of lime or ashes, or by spraying ^\ath Bordeaux mixture, 2 U.S. gals, 

 of which should be mixed with 1 oz. of powdered lead arsenate. The 

 melon aphis [Aphis gossypii] is controlled by removing the infested 

 tips of the leaves, and by under- spraying with kerosene emulsion or 

 nicotine solution. The melon worm [Diaphania hyalinata] and the 

 pickle worm [D. nitidalis] are best controlled by planting a trap-crop, 

 the buds on which should be picked and destroyed every week, while 

 the ripening fruit should be sprayed every two weeks with lead 

 arsenate. 



Watson (J. R.). Florida Univ. Agric. Expt. Sta., Gainesville. — Press 

 Bulls, nos. 233, 249, 250, 252, 256, 257, 259, 260. [Received 

 27th June 1917.] 



These popular bulletins deal with some of the common insect pests 

 of Florida and the best means of controlling them [see this Review, 

 Ser. A, i, p. 204, iii, 176, v. 305]. 



