H OHIO EXPERIMENT STATION: BULLETIN 198. 



numerous ants among the vines, should incite an immediate examina* 

 tion of the roots. Upon pulling- up an infested plant, many of the 

 roots may be found covered with clusters of small, bluish-black lice. 

 Symptoms like the foregoing do not appear until April or May, but 

 the eggs hatch in late March or early April. Whenever there is 

 good reason for supposing the pest to be present, the beds should be 

 burned over in March if this operation was neglected the preceding 

 fall. The very small, shiny black eggs of the louse are laid upon the 

 stems and along the ribs of the green leaves late in fall, usually in 

 late October and November. A mulch of straw kept over the beds 

 in winter will facilitate firing in the spring. In choosing new plants 

 for setting, be sure to use only such plants as come from uninfested 

 beds. If it is impossible to procure clean plants, fumigate the suspic- 

 ious ones with hydrocyanic acid gas, or dip them in tobacco water, and 

 plant on ground that has not grown strawberries, corn or melons, for 

 a year or more. The reason for avoiding corn and melon land is to 

 dodge the ants that specially care for the different species of aphids 

 that feed on corn, melons and strawberry. 



New strawberry plants should not be set on land that has been 

 in grass at any time for two or three years preceding, unless such 

 land is certainly known to be free from the Whitb Grub. 



Various species of Cutworms may appear in spring in the beds, 

 or among newly set plants, and do great damage. To destroy these, 

 place poisoned bran bait under boards scattered over the field. See 

 page 78. 



The Tarnished Plant Bug, Lyg-us Pratensis, attacks the 

 bloom and the forming berries, often causing what is known as the 

 buttoning of strawberries, blackberries, etc. This is a flat, brown- 

 ish bug, less than one-fourth inch long, marked with yellow and 

 black, giving it the appearance of tarnished brass, Kerosene emul- 

 sion made with pyrethro-fishoil soap is probably as effective as any 

 known remedy, but no treatment is v.ery satisfactory. 



