148 



MAINE AGRICULTURAL EXPERIMENT STATION. I903. 



of a pound to the acre and no poisons were used Aug. 19. A 

 third part of the field was sprayed the same as the second, 

 except that the Bordeaux mixture was made by using 5 pounds 

 of prepared Pine Cone Lime in place of that weight of lump lime. 

 At harvesting each part of the field was dug by the Hoover 

 potato digger. The potatoes were assorted in the field, put into 

 sacks and taken to the barn and weighed. The crop for each 

 part of the field was handled by itself. The stand was fairly uni- 

 form over the whole field and for the season a very good one, 

 about 80 per cent of a perfect stand. The condensed field notes 

 follow and in the tables beyond are given yields from the differ- 

 ent parts of the field and the yield calculated per acre. 



CONDENSED FIELD KOTES. 



Bordeaux Mixture and 

 ^ Bug Death Part of 

 Field. 



Aug. 21. 



Aug. 20. 



Sept. 1. 



Sept. 8. 



Vines beginning 

 to turn yellow. 

 Some blight. 

 The east rows 

 not so good 

 color as the 

 west rows. 

 Very little in- 

 flication of 

 work of potato 

 bugs. 



Whole of this 

 part yellowing 

 very badly. 

 Quite a little 

 blight. 



Leaves one- 



third dead and 

 the rest yel- 

 lowing. 



Leaves three- 

 fourths to 

 wholly dead. 

 iStems green 

 but some quite 

 pale. 



Bordeaux Mixture and 



Paris Green Part of 



Field. 



Aug. 21. Vines better 

 color than on 

 Bug Death 



portion. Very 

 little if any 

 evidence of 

 blight. Tops 

 not damaged 

 by bugs but 

 eaten rather 

 more than on 

 Bug death 



part. 



Aug. 26. Vines not so yel- 

 low as where 

 Bug Death was 

 used but blight 

 about the same 



Sept. 1. 



Sept. (9. 



Leaves 

 better 

 Bug 

 part. 



rather 



than on 



Death 



Leaves and 



stems about 

 the same as on 

 Bug Death 



part. 



Bordeaux Mixture from 

 Prepared Lime and 

 Paris Green Part 

 of Field. 

 Aug. 21. The notes agree 

 with those 



taken for the 

 part treated 

 with regular 

 Bordeaux and 



Aug. 26. 



Sept. 1. 



Sept. 8. 



Paris green. 



Vines appear 

 about the same 

 as where regu- 

 lar Bordeaux 

 was ased. 



Leaves about 

 the same as on 

 regular Bor- 

 deaux part. 



Leaves and 



stems about 

 the same as on 

 other parts. 



As the potatoes in the north end of the Bug Death part of the 

 field were rotting considerably, and as there was a market for 

 them for immediate use, it was decided to harvest the northern 

 part of the field September 15. The remainder were harvested 

 September 29, 1903. The table which follows shows the area of 

 the plots, the yield per plot in pounds and the calculated yields 

 per acre. 



