176 Report oF THE BoranisT OF THE 
a cucumber plant. For a time it was permitted to grow unmolested 
in order to see what it would do; but it thrived so well and be- 
came so aggressive that the man in charge of the greenhouse 
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 gronovi 
Willd., may become troublesome unless dealt with vigorously. 
We advise the immediate destruction of affected plants. 
IV. IS THE BALDWIN FRUIT SPOT CAUSED BY FUNGI 
OR 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,™ ete. 
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 hyphe 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. Bul. 65: 106. Tlus. 
12 Craig, John. Canada Exp. Farms Rept. 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. Rept. 
Vt. Agr. Exp. Sta., 1891: 133-134. 
17N. H. Agr. Exp. Sta. Bul., 45: 46-47: Bul. 65: 106. 
