158 



STATE BOARD OP AGRICULTURE. 



iug from early spring until fall. The adults winter in rubbish and 

 stubble, under fences, out-houses, etc. 



REMEDIES. 



Poisons like the arsenites are of no value against insects of this class 

 owing to the fact that the bugs suck the sap from beneath the surface, 

 thus escaping any coating that may be placed thereon. It is necessary 

 to use something that kills by contact, and to make such a spray effec- 

 tive, each bug must be hit to be killed. Use kerosene-emulsion diluted 

 about ten times when the bugs are young and make it strong as the 

 plants will stand when the plants get older and more resistant. It may 

 be preferable to use the Pyrethro-whale-oil kerosene-emulsion in some 

 cases. 



Clean culture. — As the majority of the adults pass the winter in rub- 

 bish, along fences, etc., it follows that clean culture and the late burning 

 of such material will get rid of them. Burn as late as possible in order 

 to catch these and many other pests after they have settled for the 

 winter. 



Fig. 3. — Tarnished plant-bug, showing various stages of growtli, enlarged, {aUer G. C. Davis.) 



Large-eyed Ground-bug {Geocoris buUata) . 



A short dumpy bug, of unprepossessing appearance, is often found in 

 sugar-beet fields, its natural food being purslane, pig-weed, smart-weeds 

 and others. In common with many other weed insects, it appreciates the 

 beet for a change. The writer has never heard of serious injury by this 

 bug. It is amenable to a spray of kerosene-emulsion. 



Plant-lice {ApMdidae). 



Several species of plant-lice or aphids are to be found on the beet. 

 In Michigan we have at least one species and probably more. Most of 

 the insects of this sort feed also on weeds or on some other garden crop. 

 The occurrence of plant-lice on beets has, thus far, been local and no 

 very serious cases have been brought to the notice of the writer, except 

 in the case of mother beets, or seed beets of the sugar producing type. 



