AGMCULTUEAL EXPERIMENT STATION. 117 



Bordeaux Mixture cannot destroy the potato rot in plants where 

 it is established. It can only prevent the disease spreading by 

 destroying the summer spores. 



In experimenting with Bordeaux Mixture some rows in the 

 patch should be left unsprayed to serve as a check. 



Bordeaux Mixture is a fungicide of great promise and we hope 

 others will try it and report the results. 



ENTOMOLOGY. 



Fall Canker- worm. 



Anisopteryx pometaria, Harris. 



(Ord. Lepidoptera ! Fara. Phalenidse). 



This insect is increasing rapidly in the State. We have spoken 

 in previous reports about its increase in Penobscot County, but it 

 is also increasing in other counties. Mr. Freeman Partridge 

 writes that it has done great damage about Prospect in Waldo 

 County. Mr. C. A. Arnold, Arnold, Me., says: "They are the 

 curse of my young apple trees, doing more damage to them by 

 destroying the leaves and blossoms than all other insects com- 

 bined." The shade and orchard trees about Orono were badly 

 infested the past season. The garden fences in some parts of 

 Orono were literally covered with egg clusters. As the insects 

 feed largely on the tall elms and other shade trees and forest 

 trees, there is no hope of exterminating them by confining our 

 remedial measures to the orchard. We must take steps to keep 

 them out of shade trees or they will continue to breed there and 

 transfer their depredations to the orchard. 



Mr. Partridge says the Canker-worms have troubled him for 

 three years, increasing each season. Though the spraying done 

 did not kill the Canker-worms it did destroy the Codlin Moths. 

 He says he did not find a bushel of apples affected by this insect 

 in his whole orchard, while he has had them in abundance before. 

 This would indicate that the time to spray for Codlin Moths was 

 about the time the Canker-worms are grown. We suggested the 

 use of a band around the tree to prevent the wingless females 

 ascending to lay their eggs. Mr. Partridge writes : "There is a 

 bug nearly as big as a house fly that is crawling on the trees. I 



