388 INSECT PESTS OF FARM, GARDEN AND ORCHARD 



Fumigation is much the most satisfactory method of destroy- 

 ing the aphides, for it will kill them" all even though the leaves be 

 curled. Carbon bisulfide was formerly used quite extensively 

 for this purpose, a teaspoonful being applied for each cubic foot 

 of space under the tub, box, or cover used. Recently, however, it 

 has been shown that tobacco-paper is a much more satisfactory 

 fumigant and it has been extensively used with excellent results. 

 A light frame is made large enough to cover the size of plants to be 

 treated and covered with cheap muslin which is sized with oil. 

 The cloth should extend on the ground for about a foot, so that 

 it may be covered with earth. One man can look after about 

 ten frames. After the frame is placed over the plant a sheet 

 or half sheet of the tobacco-paper (according to the brand used 

 and experience with it) is torn in two and a half placed in 

 perforated tin cans in opposite corners of the frame, and ignited. 

 Earth is then heaped over the flap and the fumigation should 

 continue ten to thirty minutes, according to the strength used, 

 and other conditions, as experience will determine. This treat- 

 ment has the advantage that it destroys all of the aphides while 

 the predaceous and parasitic insects are merely stupefied and 

 soon revive and feed on any remaining aphides. "Fumigating- 

 kind " tobacco powder might probably be used instead of paper 

 and is used very extensively for the same purpose in fumigating 

 green-houses for this pest. Many tobacco preparations are on 

 the market for greenhouse fumigation and will usually be found 

 satisfactory when used as directed. 



The Squash-bug * 



About the time the vines begin to run a wilted leaf is found 

 here and there which examination shows to be due to the common 

 brownish-black squash-bug. If search be made in early morning, 

 the bugs will usually be found secreted under clods of earth, or 



* Anasa tristis DeG. Family Coreidce. See Weed and Conradi, Bulletin 

 89, N. H. Agr. Exp. Sta.; F. H. Chittenden, Circular 39, Div. Ent., U. S. 

 Dept. Agr. 



