EXPERIMENT STATION BULLETINS. 595 



eight days and then emerge as adult beetles. The entire time required 

 from the laying of the egg to the appearance of the adult is about a 

 month. The winter is passed by the adult under rubbish, loose bark, 

 etc. The adult beetle (Fig. 24a) is about one-quarter of an inch in length, 

 the wing-covers are reddish-yellow and cream color marked with black. 

 The head is black and the thorax reddish-yellow. The larvae are grayish 

 with a black head. To our knowledge it has appeared thus far in Berrien 

 county only, but it may be expected, in the course of a few seasons, to 

 extend its range to the entire southern portion of the State. 



REMEDIES. 



While the asparagus beetle, if allowed to have its way, will put a 

 serious impediment in the way of asparagus growing, it is easily held in 

 check by a careful and conscientious use of the measures recommended. 



Seedlings and old plants not at the time being used for the table or 

 market should be sprayed with Paris-green. This will dispose of both 

 the beetles and grubs on them if repeated from time to time. The fields 

 which are being regularly cut for use should not be sprayed on any 

 account, because of the danger to human life, but a practice should be 

 made of always leaving some young shoots for the beetles to lay their eggs 

 upon, and these shoots should be cut and burned before they are a week 

 old to destroy the eggs, which otherwise would hatch at the end of eight 

 days. If such patches be systematically left all over the field and care- 

 fully cut and burned at the proper time, early in the season, the beetles 

 will be found to decrease in number as the season advances. As soon as 

 the cutting season is over the whole field should be sprayed from time 

 to time with Paris-green and all rubbish about the field should be burned 

 late in the fall. 



Air-slaked lime will kill many grubs if dusted on them, as will also 

 Pyrethrum. Kerosene-emulsion also will kill them, but the methods 

 first named have thus far proved the most effective. 



THE PEAR SLUG. 



(Eriocampa cerasi. ) 



The family of saw-tiies takes its name from a saw-like appendange or 

 ovipositor with which the female plows or gouges out a pocket or furrow 

 in which to place the eggs. They are not true flies at all, but the adults 

 are somewhat wasp-like in appearance. The larvae of most saw-flies 

 are soft and somewhat sticky "worms or slugs," and many of them are 

 quite injurious to vegetation. 



The larva of the pear-slug or cherry-slug (Fig. 25) is a shiny, dark-green 



Fig. 25. Pear Slut, r [Eriocampa cerasi). 



