254 ILLINOIS STATE ACADEMY OF SCIENCE 



blighting and killing of terminal buds that occur each 

 year justify an estimate of damage done equivalent to a 

 yearly crop reduction of at least 1 per cent. 



Quince: Fire blight (Bacillus amylovorus (Burr.) 

 Trev.) occurred occasionally on twigs and fruit but was 

 not generally important. 



Leaf blight (Fabraea maculata (Lev.) Atk.) was as 

 common as usual and resulted generally in slight defoli- 

 ation. It was collected in seven counties, the earliest 

 collection being made July 5 at Mt. Carmel. 



Powdery mildew (Podosphaera oxyacanthae (D. C.) 

 deBary) was found in Coles and Edgar counties. The 

 date of collection was August 29. This is the first re- 

 port of the presence of this disease on this host in Illi- 

 nois. 



SMALL FRUITS 



Blackberry: Anthracnose (Plectodiscella veneta 

 Burk.) is the most important blackberry disease in the 

 state. It occurs throughout the state, and is especially 

 abundant northward. We have estimated a crop loss 

 from this source of at least 3 per cent. 



Cane blight (Leptosphaeria coniothyrium (Fckl.) 

 Sacc.) occurs throughout the state. It is probably more 

 severe southward. 



Leaf spot (Septoria rubi West) was abundant every- 

 where and is believed to have been responsible for a crop 

 reduction of at least 1 per cent. 



Leaf spot (Cercospora bliti Tharp) was found twice 

 in southern Illinois. This disease is reported to be se- 

 vere in Texas. This is the first report of its presence 

 in Illinois. 



Orange rust (Gymnoconia interstitialis (Schlecht.) 

 Lagerh.) was locally abundant and severe. 



Gooseberry: Anthracnose (Pseudopeziza ribis Kleb.) 

 caused serious defoliation locally, and occurred as a mild 

 infection generally over the state. 



Leaf spot (Septoria ribis Desm.) was common througn- 

 out the state, and was sufficiently injurious to be esti- 

 mated as equivalent to a 1 per cent crop reduction. 



