A PARASITIC BOTRYTIS ON PEPPER AND LETTUCE. 43 
connected the conidial stage of Botrytis with the apothecial 
form produced from the sclerotia of Botrytis on grape. How- 
ever, up to the present time this connection has been disputed, 
as many observers have failed repeatedly to secure, under 
favorable conditions, the perfect stage from sclerotia produced 
by Botrytis. The utmost confusion exists since many 
authors have tried to connect the botrytis stage with 
Sclerotinia Libertiana Fuckel, whose conidial stage has 
probably been completely lost. 
In Europe, Botrytis cinerea is important as the cause of a 
disease on a number of hosts, but it is especially destructive, 
at times, on the leaves and fruit of the grape. Pirotta (39), 
in 1881, again connected Sclerotinia Fuckeliana with the 
imperfect stage of B. cinerea, and was also able to prove 
that S. Libertiana was distinct from the above forms. The 
material was found on the fallen leaves and fruit of the grape. 
The work of Pirotta can be summed up by adding the follow- 
ing table, which he gives in his summary :— 
th ca 
ne | 
1. Sclerotia 1. Selerotia 1. Botrytis 
| | (mycelium ) 
2. Botrytis 2. Ascospores 
(mycelium) (apothecia ) 2. a 
| 
3. Botrytis (conidia) 3. Botrytis 
(mycelium ) 
4. Sclerotia | 
4. Botrytis (conidia) 
5. Ascospores 
(apothecia ) 5. Sclerotia 
6. Ascospores 
(apothecia) 
This table of Pirotta, starting with the ascospore, represents 
the three lines of development which he was able to trace. 
Brefeld (9) at first accepted the results of De Bary, but later 
he discredited them, being unable to obtain apothecia from 
the sclerotia after many attempts, germination resulting al- 
ways in the production of conidia. Viala (61) and Ravaz 
(43), in France, and Brizi (10), in Germany, described a rot 
