M 



Bulletin 1T2. 



From the above statements, cherry growers can readily under- 

 stand how serious a menace to their business this new pest miglit 

 easily become, and how important it will be for them to learn all 

 they can about it. 



As we made our first acquaintance with the pest only about two 

 months ago, we have had no opportunity to fully investigate its 

 habits, and hence cannot tell its life-story in detail. For the same 

 reason, we have not tested any remedial measures to control it, but, 

 fortunately, we have at hand tlie literature giving the results of 

 experiments against similar insect pests working in the fruits of 

 European countries and of our antipodal neighbors in Australia, 

 New Zealand and South Africa. This bulletin is therefore simply a 

 preliminary report for the purpose of calling the attention of cherry 

 growers to this new pest, with an account of what measures have 

 been used against similar pests, all with a view of helping the 

 growers of cherries to understand the nature of the enemy and to be 

 on the lookout for it. 



Characteristics of the I^ew Pest. 



This new insect enemy of cherries is very different from the 

 plum curculio, which has heretofore been justly accused of being 

 the cause of all " wormy " clierries. The grub of the plum cur- 

 culio is shown much enlarged in figure 10, while the " worm " which 



has been found in from one-fourth to one-third 

 of the cherries on some trees tlie past summer, 

 is shown, natural size and enlarged, in figure 11. 

 As a comparison of tliese figures will show, this 

 new cherry " worm " is quite different and can be 

 easily distinguished from the grxib (name applied 

 to the larva of a beetle) of the plum curculio. 

 This new cherry " worm " is instead a true 

 f^\^ " ^y^ m<3^^p'(9^, a name given to the larvae of the 



^- • •^"''■^ two-winged insects — the flies, like the common 



house fly. 



The shape and size of tliese cherry maggots, 

 when full-grown, are well shown in figure 11. 

 They are of a very light yellowish-white color. 

 From each side of the body near the head pro- 



10.— The grub of the 

 plum curculio, en- 

 larged. This is usu- 

 ally the culprit Jound 

 in ' ' wormy " cher- 

 ries. 



