176 Repokt of the Botanist of the 



a cucumber plant. For a time it was permitted to grow unmolested 

 in order to see what it would do; but it tlirived so well and be- 

 came so aggTCSsive that the man in charge of the gi-eenhouse 

 found it necessary to take precautions to prevent it from spread- 

 ing to the other plants. Four times during the spring the yellow 

 threads were carefully removed. In spite of this rough treatment 

 it flourished and fruited profusely and succeeded in thoroughly 

 establishing itself upon four of the neighboring plants. The 

 original host plant was greatly enfeebled by it, but not killed. 



This dodder, which we have determined as Cuscuta gronovii 

 Willd., may become troublesome unless dealt with vigorously. 

 We advise the immediate destruction of affected plants. 



IV. IS THE baldwi:n" fruit spot caused by fukgi 



OE BACTERIA? 



There is a widely distributed and well known disease of the 

 apple in which spots of brown, spongy tissue appear underneath 

 the skin of the ripe fruit. On the surface of the fruit these spots 

 are generally indicated by brown, more or less circular depressions 

 having a diameter of from one-sixteenth to one-fourth of an inch. 

 By different authors it has been given -different names; e. g., spot, 

 brown spot,^^ dry rot,^^ bitter pit,^^ stippen,^^ etc. 



This disease is of uncertain origin. Wortmann^^ thinks it due 

 primarily to insufficient water in the affected parts. Most investi- 

 gators have failed to find fungus hyphse in the diseased tissue, 

 but Jones^® has attributed it to a fungus which Ellis determined 

 as Dothidea pomigena Schw. Lamson^^ reports experiments in 



11 Lamson, H. H. N. H. Agr. Exp. Sta. Bui. 65 : 106. Illus. 



12 Craig, John. Canada Exp. Farms Eept. for 1896: 171-172. Illus. 



13 Cobb, N. A. Agr. Gaz. N. S. Wales, 9 (1898) : 683. Illus. 



14 Wortman, Jul. Ueber die sogenannten " Stippen " der Aepfel. Landw. 

 Jahrb., 21 (1892): 663-675. 



15 Loc. cit. 



16 Jones, L. R. A Spot Disease of the Baldwin Apple. Fifth Ann. Kept. 

 Vt. Agr. Exp. Sta., 1891: 133-134. 



17 N". H. Agr. Exp. Sta. Bui., 45 : 46-47 : Bui. 65 : 106. 



