SlH'll).vvill('. ;iml Iii(li;mii|«ilis. IIolTci- icpoils tli.it llic inrcclioii wns ratlior 

 li.irlil. nui.tiiii;; from 2 lo :','/(. 



DniiiUi injury (o c(trn hocanic very severe in .hil.v and a marked lirin},' ef 

 the leaves (^specially on the lijililer soils was one of llie icsnlts. Certain 

 l(pialilies .suffcM-ed witrse (lian olliers in (liis re.iiard. 



CUCUMKEU. 



r.aeterial wilt ciinsed by linviUus trachciphiluK oceasionod lieavy losses 

 in eertain sreenliouses near Indianapolis and Terro Haute and was com- 

 mon in tlie tield crop in Lake County. In the j^reenhousc crop heavy 

 infestation of Irnits on diseased vines was noted. 



Mosaic was of considerable imi)ortanee in tlie .greenhouse an<l eold-fi-ame 

 crop hut was not as prevalent as usual in the picl^le crop. 



Antln-aenose caused by CoUctotrichum laycnarium was very destructive 

 in certain frreenhouscs where overliead watering was i)racticed. The 

 disease was very destructive on all of the foliajre uji as hii^h as the wator- 

 inji 'niH^a. 



Anjiular leaf spot due to Bacterium lachrymans was noted in the tie'd 

 crop but was net found in the greenhouses. This disease was pre\alent 

 in tlie pickle crop about Plymouth, LaPaz, and Lakeville in 1917 and 1918. 



Powdery mildew caused by Enjnii)hc ciehoraccanitii was noted occasion- 

 ally in j,'reenhouses and was more prevalent on the fall crop. 



Downy mildew^ caused by Pcronoplasmopara cuhcnsis was found to a 

 limited extent ou the fall crop In one greenhouse. 



Nematodes are one of the worst difficulties encouutered in growing cucum- 

 bers in the greenhouse. One grower reports that the inroads of this trouble 

 occasioned the iy.stallaticn of a system of control which entailed an original 

 outlay of if 15,000 and an annual operation cost of $500. 



Eggplant. 



I.eaf-spot and fruit rot caused by I'hoinopsis vcxans was found in the 

 Indianapolis market gardens. More serious, however, was a wilt disease of 

 undotermintd origin. 



Kale. 

 Yellows due undoubtedly to Fusariiim comjlutinans occurred in certain of 

 the Indianapolis market gardens. 



Lettuce. 



In the greenhouses, downy mildew caused by Brcinia Uichicac was preva- 

 lent in the winter crops. It has been found that a low temperature greatly 

 favors six)re germination and this may explain why the disease is not so 

 severe in the spring crop under glass and is ab.sent in the field crop. Downy 

 mildew affects mainly the older leaves and not only renders the older leaves 

 unfit for market, but also predisposes them to a Botrytis rot. Botrytis not 

 only attacked these older leaves, but also caused a stem rot which iisiially 

 resulted in the death of the alTected plants. 



