226 Bulletin 253. 



There were four rows of sprayed grapes, and two rows of un- 

 sprayed, 



Of the 1291^ pounds of grapes from sprayed rows, there were 158 

 pounds that were sorted out and graded as green grapes. Mr. Williams 

 stated that these would sell at ten dollars a ton. In a non-experimental 

 plat these green grapes would have been left to ripen, and would probably 

 have come in with the number one of commercial grade, There was a 

 much smaller quantity of green grapes in the unsprayed lot, 41 pounds 

 only in the total of 564J pounds, 



Bagging. 



Growers think that enclosing the bunch in a sack soon after the 

 fruit forms has several advantages: 



(a) Protection from mechanical injury. 



(b) Protection from frost. 



(c) Delays maturity or ripening. 



(d) Protection from rot. 



The writer does not wish to discuss the first three. Plat 3 was 

 planned in order to determine what protection from the rot a bag afforded 

 the bunch. The results are marked. A portion of the plat was bagged 

 immediately after the blossoms fell and before the appearance of the rot. 

 The remainder was bagged about ten days later, which is as early as is 

 practicable on a commercial scale. The results were determined by com- 

 puting the per cent of bunches free from rot. Several hundred bunches 

 were counted, and computations made in different parts of the plat. The 

 results were in favor of the unbagged bunches. In the vineyard at 

 Romulus (Niagara), an average of the different computations 

 showed sixty-two per cent of the bagged bunches free from rot, and 

 thirty-eight to contain rotten berries. Of the unbagged, seventy- 

 six per cent were free from rot, and twenty-four contained rotten 

 berries. 



The vineyard at Penn Yan showed the same results, although fewer 

 bunches were treated. Twelve clusters were bagged on the unsprayed 

 rows, and every cluster carried from three to thirteen rotten berries. 

 Forty clusters were bagged on the sprayed row, thirty-one of which 

 were more or less rotted, and nine absolutely free from rot. By 

 weight there were nine and one-half pounds of the bagged grapes. 

 Of these two pounds were absolutely free from rot, while seven 

 and one-half pounds carried a considerable number of rotten 

 berries. 



