266 STATE HORTICULTURAL SOCIETY. 



These areas on the fruit were slightly sunken as if a finger had been 

 pressed on them. Many of the fruits badly affected had cracked and all 

 were unmarketable. We reported it as Morihiera MespiUi, I'uckel ; var. 

 Cydonkv, Cooke and Ellis, the name by which it was usually known at 

 that time. Saccardo has revived the earlier name Eniomosporium 

 maculatiim. Lev., which is given in his Sylloge Fangonim^Yn., p. 657, and 

 by which it is now usually mentioned. 



For some years it has been scarce on the quince although it was abun- 

 dant this year in some localities in New York. 



It affects the pear in precisely the same way, causing the leaves to fall 

 and the fruit to crack. The greatest injury, however, is caused by its 

 attack on seedling pears or quinces in the nursery. By causing the fall of 

 the leaf the parasite so weakens the standard that grafting will not succeed. 



Fortunately experiments during the past two years have proven — so we 

 are assured on good authority — that this disease in all its phases, can be 

 entirely controlled by the use of the copper solutions.* No nurseryman or 

 fruitgrower need suffer further loss therefore, if he sprays the leaves once 

 in two or three weeks in the early part of the growing season, and is care- 

 ful to renew the spraying after heavy showers. 



Considerable has been written concerning the habits of this parasite. It 

 is believed to be chiefly reproduced through its conidia (the spores figured 

 in this paper), but Sorauerf claims to have discovered peritheeia with 

 ascospores, or resting spores, on old leaves late in the autumn; such, however, 

 have not been reported in America. Indeed there are many hidden facts 

 connected with the hibernation of this fungus, and the sources of its infec- 

 tion in the spring, which, if known, may lead to precautionary care such 

 as may save time and money to the fruitgrower. One of the students in 

 this laboratory is now at work on this question, has contributed the draw- 

 ing (No. 5), would be glad to correspond on the subject, and will publish 

 the results of the work if new facts are developed. 



The clover rust [ Uromyces Trifolii ( Alb. and Schwein. ) Wint. ] is 

 another recent arrival from the old world, and has destroyed a great 

 amount of the host-plant this season. If correspondents can furnish us 

 with well-considered estimates of the injuries caused in different localities, 

 or the history of its appearance, such facts may prove of value to us in 

 investigations now going on. 



W. K. Dudley. 



THE APPLE-TREE TENT CATERPILLAR. 



Clisiocampa americana. 



During the last few years the orchards in many parts of this state have 

 become overrun by the apple-tree tent-caterpillar. In certain sections 

 this insect has increased to so great an extent that it has destroyed every 

 leaf in the orchards. Although the habits of this insect have been well 

 known to entomologists for many years, it is evidently worth while to give 

 a brief account of it in this place ; for it is rapidly assuming the importance 

 of a first-class pest. This, however, is unnecessary, as it is one of the easiest 

 of insects to combat. 



We have two very common insects that build their webs in fruit and 



* See Garden and Forest, Dec. 4, 1889, p. 582. 



t Pflanzenkrankheiten Ed. II., Vol. II., p. 371. Plate XVI. 



