No. 4.] 



FUNGOUS DISEASES. 



445 



ber or Decenibor. If crop.s, howfvcr, arc set iti the house 

 as late as October, they are apt to remain tree from mildew 

 during the rest of the year. Keeping tlie moisture down in 

 the liouse, together with ventihi- 

 tion and light, is the best pre- 

 vention of mildew. We have 

 kept this mildew entirely in check 

 on more than one occasion by 

 simply keeping the moisture down 

 in the house, and supplying the 

 })lants with sufficient light and air. 

 Since mildew infection comes 

 largely during the summer, one 

 of the best wa3's to obviate it is 

 to not set the plants until aliout 



October. The mildew can also he prevented by spraying 

 with Bordeaux, as has been shown by experiments. In short, 

 this is the only remedy that can be applied to outdoor crops 

 of cucumbers. 



Fig. 3. — Cucumber downj' mil- 

 dew, showing tlie cliaracteristic 

 angular spots. 



Anthracnose i^Colletotriclnim Lagenarimn, (Pass.) Ell. & 



Hals.). 

 This fungous disease causes a great deal of trouble to out- 

 door crops of melons and cucumbers (see Fig. 4). It has 

 become well-nigh impossible during the past two or three 



years to grow melons out of doors. 

 From our numerous correspond- 

 ence with farmers each year relat- 

 ing to this disease, it would appear 

 that it made little difference 

 whether one spra3'ed or did not 

 spray. The result has always been 

 the same, namely, the plants would 

 blight and most of the crop would 

 be lost. AntJtracnose occasionally 

 attacks greenhouse crops during 

 the spring and summer ; although our experience in handling 

 cucurbitaceous crops under glass, during every month in the 

 year, without a trace of infection, has led us to believe that 



Fiu. 4. — Cucumber leaf affected 

 with anthracnose. 



