1913 ENTOMOLOGICAL SOCIETY. i9 



introduced as often as necessary. It is not necessary to cover :tlie 'box, a broad, 

 heavy chalk line near the top of the box is sufficient to impede their migration. In 

 the infected box the first diseased specimens appeared six days after introduction, 

 seven specimens being found, all mature and probably "spent" bugs. No other 

 specimens were obtained until 14 days after introduction, when 16 specimens were 

 found to be diseased. The experiment was carried on for a month, with no other 

 appearance of diseased bugs. In the uninfected box, not one diseased specimen was 

 obtained. Through the whole month the weather was extremely cool, and this can 

 be the only reason why the experiment was not a greater success. 



Remedies. As the Chinch Bug hibernates under rail fences, tree trunks, 

 tufted grasses, leaves, and rubbish of all descriptions, the advantage of what may 

 be termed clean farming, and regular rotation is at once suggested. As far as prac- 

 ticable burn over all waste places in the fall as late as possible, so as to expose them 

 to the rigours of the winter. To be effective, the burning must be done thoroughly, 

 otherwise little or no good will result. 



As most of the meadows infested are adjacent to woodlots in which the greater 

 part of the bugs hibernate, it seems reasonable to believe that if a strip of land next 

 the woodlot was ploughed in the early fall, and planted to wheat, it would serve as 

 an excellent bait crop for the bugs coming out of their winter quarters. An in- 

 viting food would be at first hand, the eggs would be deposited on the wheat plants, 

 where they could be promptly destroyed, bugs and all, by efficient ploughing and 

 immediately rolling the ground. 



To eliminate the Chinch Bug from a badly infested meadow is practically an 

 imjx>ssibility, and, where the injury has been severe, the only recourse is to fall 

 plough the land and plant the same to a hoe or leguminous crop. 



Should the bugs be numerous in a wheat or oat field, they may be trapped as 

 follows : Previous to the harvesting of the grain, a swath should be cut around the 

 infested field, and a space cleared with a hoe about 1 ft. wide. Post holes sihould 

 then be dug about 13 in. to 16 in. deep, and about 30 ft. to 35 ft. apart. As soon 

 as harvest starts a thin line of No. 7 asphalt road oil should then be poured on the 

 clear surface, touching the outside surface of the holes. As harvesting proceeds and 

 the bugs are threatened with starvation they wiTl eommence to migrate from all 

 parts of the field. As soon as they encounter the asphalt barrier they will be 

 forced by sheer numbers into the post-holes, when they may be promptly destroyed 

 by ponring in a little kerosene. To cite an instance of the efficiency of this method, 

 it may be stated that last year with V/2 barrels of oil round a 10-acre field of badly 

 infested wheat, three bushels of Chinch Bugs were collected in eight days in a field 

 close to Carbondale, Illinois. When a eorn field is adjacent to a pasture or hay 

 field, where the bugs are somewhat numerous and migrating on to the field of eorn, 

 they may be killed by spraying the corn with a ten per cent, solution of kerosene. 



A little caution is necessary in using this substance. Do not pour the solution 

 into the heart of the plant, and spray preferably early in the morning or late in 

 the afternoon, otherwise the foliage may be burned. Unless the corn is vigorous, 

 the kerosene emulsion is not recommended, but in its place use the following mix- 

 ture, which is absolutely safe, but slightly more expensive. 



2 ozs. soft soap. 



y2 oz. black leaf 40 (40 per cent, nicotine). 



1 gallon soft water. 



4 E.S. 



