26 



N. H. AGR. EXPERIMENT STATION. 



[Bulletin 203 



The Hme had very little effect on the cabbage as may be seen from the 

 above table. Only two plots show a marked deviation, — Plot 2 with a de- 

 crease of 16.3% and Plot 5 with an increase of 31.7%. 



Tomato Spraying Experiments. 

 One of the important diseases affecting the tomato under glass is the leaf 

 mold (Cladasporium folorum). Various spray mixtures are recommended 

 for its control, among which are Bordeaux mixture, Ammoniacal copper 

 carbonate and Foi'malin in varjdng strengths. 



In the spring of 1921 one greenhouse was planted by Mr. Hepler to to- 

 matoes and the plants sprayed according to the following plan: 

 Row 1 — Untreated and eliminated. 

 2— Formalin 1-75. 

 3 — Ammoniacal copper carbonate. 

 4 — Check (unsprayed) 

 5 — Bordeaux 4-4-50. 

 6— Bordeaux 4-2-50. 

 7— Formalin 1-500. 

 8— Formalin 1-750. 

 9 — Ammoniacal copper cai;bonate. 

 Row 10— Check. 

 Row 11 — Bordeaux 4-4-50. 

 Row 12— Bordeaux 4-2-50. 

 Row 13— Formalin 1-500. 

 Row 14 — Untreated and eliminated. 

 The results as follows are the totals for both sets of rows: 



Row 

 Row 

 Row 

 Row 

 Row 

 Row 

 Row 

 Row 



The spraying did not benefit the plants in the absence of disease, and in 

 the case of the 4-2-50 Bordeaux and 1-750 formalin treatments reduced yields 

 materially. 



Suckering Sweet Corn. 



In an experiment to determine the effect of suckering on sweet corn, 2 

 rows of Early Crosby, 250 feet long, were suckered and 2 left as a check. The 

 com was suckered at the time the suckers were half grown and before the 

 ears appeared on the main stalk. 



The yields were found bj'^ Mr. Hepler to be as follows: 



