820 IOWA DEPARTMENT OF AGRICULTURE 



was abundant in southwestern Iowa. Apple blight was severe only on 

 the Transcendent crab apple, then only in June. No infection occurring 

 later. Some bitter rot of the apple was reported from western Iowa. 



DISEASES or SMALL FRUIT. 



Blackberries in some places were infected with the Red rust (Caeoma 

 nitens or Gymnocomia PecJciana). Such infection can be traced to old 

 diseased plants. There was also some spot of the blackberry (Septoria 

 Rubi). The strawberry blight {MycosphaereUa Fragariae) was not 

 abundant. Here and there we noted some crown gall on blackberry 

 (Pseudomonas tumefaciens) . Some gooseberry mildew {Sphaerotheca 

 mors-uvae) in northern Iowa on cultivated gooseberries. In a few cases 

 the spot disease of currants {Gloeosporium Ribis and Cercospora angu- 

 lata) were abundant only however locally. 



STONE FRUITS. 



The Brown rot of plum (S'clerotinia fructigeana) was not common only 

 in late plums. Plum scab {Cladosporium carpophilum) was rare. On 

 the other hand this fungus was common on the peach in southeastern 

 Iowa. Mildew on the cherry, though occurring, was less abundant than 

 in previous years, 1912 and 1913. The spot disease of the cherry (Cylindro- 

 sporium padi) was rare, except late in the season. Plum pocket (Exoascus 

 Pruni) was rare, enlarged branches (Exoascus communis) were common in 

 a few places on the Miner plum. 



DISEASES OF THE GRAPE. 



There was little of the Powdery Mildew (Uncinula necator) anywhere 

 in the state. In western Iowa in the vicinity of Council Bluffs there 

 was some Downy Mildew (Plasmopara viticola) on the Concord grape. 

 No Black rot or Bird's Eye fungus was observed. 



DISEASES OF ORNAMENTAL PLANTS. 



There was much mildew (Sphaerotheca pannosa) on the Crimson 

 Rambler rose. There was some mildew on the lilac later in the season. 

 China asters in one part of the state were attacked by a species of 

 Fusarium and in a Des Moines greenhouse the snap dragon rust (Puccinia 

 antirrfiinii) was reported. 



DISEASES OF ROOT CROPS. 



Potato scab (Oospora Scabies) was reported from numerous points in 

 the state especially severe on the early Ohio. After an investigation of 

 the Powdery Scab in the state it may be stated that it has not been re- 

 ported to us. The Fusarium disease of the potato is quite widely scat- 

 tered in Iowa. In some cases beet scab was reported and onion smut was 

 reported from Scott county. 



DISEASES OF VEGETABLES. 



Asparagus rust occurred in usual amounts in many parts of Iowa. 

 There was some Fusarium rot of cucumbers in greenhouses and in the 

 field. During the fall rains, tomatoes were badly attacked by Fusarium. 



