l6o STATE POMOLOGICAL SOCIETY. 



all of which occur upon the trees during the same time. In a 

 similar way, because arsenical spraj'S are recommended for a 

 multitude of orchard pests, it does not mean that the sprays 

 need be applied a multitude of times each season. 



Much study has been put upon these orchard pests by eco- 

 nomic entomologists all over the country, but that avails the 

 orchards nothing unless the orchardists make practical use of 

 the resulting suggestions. Experiment stations have repeatedly 

 demonstrated the value of spraying for the codling moth, yet 

 it is optional with the owner of the trees whether he shall profit 

 by those demonstrations or not. It has been known for i8 

 years that a consistent and persistent destruction of infested 

 fruit would practically exterminate the apple maggot, and the 

 apple maggot is working in many parts of Maine as much havoc 

 now as it did 20 years ago. 



It is due orchardists of the State that the insect pests upon 

 so important a crop should be studied for the purpose of finding 

 what can be done by way of combating them. This the Experi- 

 ment Station is willing and interested to continue to do. And 

 to this end it welcomes and invites co-operation from the Pomo- 

 logical Society along the "following lines : 



1. The submitting of apple tree insects for determination, — 

 material carefully packed and abundant enough for thorough 

 examination or for breeding in case of an undetermined cater- 

 pillar. 



2. Observations by orchard owners concerning the insects 

 submitted, as in regard to their abundance, time of appearance 

 and character of injury. 



3. Report of Pomologists in case a remedy suggested does 

 not upon thorough application work successfully, with a state- 

 ment of what conditions interfere with the efficiency of such 

 treatment. 



4. The maintenance of so strong a sentiment for clean 

 culture in all that term implies that it will be practical to investi- 

 gate insect difficulties. For instance, there are small chances 

 of getting much information about leaf miners in orchards 

 where the web worm, tent caterpillar, and red-humped cater- 

 pillar are at work, — for there do not remain any leaves for the 

 leaf miner to ruin and in such an orchard the yellow-necked 

 caterpillar may destroy not only the leaf miner, but, alas, alas, 



