BACTERIAL WILT OF CUCURBITS. 



37 



VARIETY TESTS. 



The results of the tests already published * give little hope of con- 

 trol in cucumbers or cantaloupes through resistant varieties. A sec- 

 ond variety test on Long Island (1916) and a third at Tuxedo, Md., 

 (1917) have not changed this conclusion. Wilt infection is rarely as 

 bad in squashes as in cucumbers or cantaloupes and it, is not often 

 serious enough to require special control measures. The variety 

 tests showed greater differences in resistance among squashes, and 

 should control become necessary it is possible that fairly immune 

 varieties might be developed. 



SPRAY TESTS. 



The earlier spray tests 2 were repeated (1916) at East Marion, Long 

 Island, on a larger scale and with some modifications. On May 12, 



Plot l 



Fig. 10.— Curves showing the percentage of bacterial wilt and the weight and number of fruits in 11 plats 

 of the cucumber spray test, East Marion, Long Island, N. Y„ season of 1916. 



1916, Woodruff's Hybrid cucumbers were planted in hills 3 by 4 

 feet apart on a level and uniform strip of land about one-half acre 

 in extent. This area was divided into 11 plats, each containing 81 

 hills. Two of these plats were left untreated as controls, and one 

 plat was treated to equal parts of lime and tobacco dust, while the 

 remaining 8 plats were given spray applications varying as to num- 

 ber and ingredients. The dates of application of the various treat- 



» Rand, F. V., and Enlows, Ella M. A., 1916. Op. cit., p. 426-428. 

 « Rand, F. V., and Enlows, Ella M. A., 1916. Op. cit., p. 429-433. 



