gals, water. A power spray is advisable owing to the low, spreading 

 nature of the vine growth. Kerosene emulsion is less successful as a 

 spray, and may damage the plants. A strong stream of water from a 

 garden hose will wash off many insects. Suitable spraying machines 

 and apphances are described. In small fields fumigation with carbon 

 bisulphide under tubs or other tight receptacles or covers is effectual, 

 1 drachm (or about a teaspoonful) of the chemical being required to 

 each cubic foot of space. Clean cultural methods are a great help 

 in Aphid control, and all remnants should be collected and burnt 

 as soon as the crop is gathered. Weeds in the vicinity of crops 

 should be kept down throughout the year. 



Kyle (C. H.). How to reduce Weevil Waste in Southern Corn. — 



U. S. Bept. Agric, Washington, B.C., Farmers' Bull. no. 915, 

 February 1918, 7 pp., 3 figs. [Received 29th October 1918.] 



A serious obstacle to the increase of profitable production of maize 

 in many localities is the prevalence of insect pests, which have made 

 it impracticable to store the crop until it can be used. Ears with 

 poor shuck coverings are frequently damaged before the maize can be 

 stored, and even if clean when stored, quickly become infested from 

 other sources. Shucks that extend beyond the tips of the ears and 

 close tightly about the silks are weevil-proof both in field and in 

 storage. It is suggested that directly after harvesting the ears should 

 be sorted and poorly protected ears disposed of as rapidly as possible. 

 If it is necessary to store maize with poor shuck protection, the seed 

 should be shucked, shelled, cleaned and put into bags of close-woven 

 cloth. Ears having long, closely fitting shucks should be stored in 

 their shucks, and the best ears of this kind should be selected for the 

 next year's seed. 



LuGiNBiLL (P.). The Southern Corn Rootworm and Farm Practices 

 to control it. — U.S. Bept. Agric, Washington, D.C, Farmers' 

 Bull. no. 950, May 1918, 12 pp., 7 figs. [Received 29th 

 October 1918.] 



The hfe-history and habits of Biabrotica duodecimpunctata, Oliv. 

 (southern corn rootworm) have previously been described [see this 

 Review, Ser. A, i, p. 430]. Preventive measures advocated in this 

 bulletin against the pest include the burning over of waste places, such 

 as the borders and terraces of fields, in winter and on cool days, when the 

 beetles are congregated among dead grasses seeking protection from the 

 cold. Crop rotation should be practised when possible, and an infested 

 maize field should not successively be planted with maize. Cotton 

 is not injured by the grubs and some of the smaller grains are only 

 slightly damaged. A common practice is to plant maize seed much 

 more thickly in the lowlands than the uplands, to secure a better 

 chance of a crop on the lower ground. The use of commercial fertihsers 

 strengthens the plants and affords a less favourable breeding-place for 

 the pest. In each locality planting should be timed to minimise the 

 ravages of the grubs. 



(C529J a2 



