CRAKBEREY SPRAYING EXPERIMEZ^^TS IN 1905. 9 



menced to put out new growth. This application was the one men- 

 tioned as being made before the usual flooding for insects. 



Plats 5 and 9 were spra_yed five times, as follows: June 2, June 22-23, 

 July 14-17, Juh^ 31-August 1, and August 15-17. On June 2, when 

 the first application was made to these plats, there was a good growth 

 of 3"oung shoots and leaves. Counts of fruit on small areas, as in the 

 preceding case, gave the following results: Sprayed plat 5, 2.62 per 

 cent of rotten berries; sprayed plat 9, 2.1 per cent of rotten fruit; check 

 plat tt, 91.8 per cent rotten; check plat 10, 93.5 per cent rotten, giving 

 an average of 2.36 per cent of rotten berries on the sprayed plats and 

 92.6 per cent of rotten fruit on the unsprayed plats. There was very 

 little difi'erence in the amount of rot on this series of plats and that on 

 the series mentioned in the preceding paragraph. 



Plat 6 was sprayed but three times, as follows: July 14-17, July 31- 

 August 1, and August 15-17. Counts made, as in the previous cases, 

 on September 8, gave the following results: Sprayed plat, 18.3 per cent 

 of rotten berries; check plat, 91.53 per cent of rotten fruit. It may 

 also be added that a greater number of the berries from this sprayed 

 plat deca3^ed before they were ready for shipment than was the case 

 with the fruit from the plats which received five applications. 



The fruit from an area of 1,048 square feet, showing average condi- 

 tion of fruit on spra3^ed plat 7, was carefully hand picked and produced 

 3 bushels of sound fruit, which is at the rate of about 125 bushels per 

 acre. The same area from check plat 8, showing the average condi- 

 tion of fruit, gave a scanty peck, or at the rate of about lO/g bushels 

 per acre. In other words, there was twelve times as much sound 

 fruit on the sprayed as on the unsprayed plat, or a saving of over 100 

 bushels per acre. 



Besides our purely experimental plats, several acres upon another 

 cranberry" bog known as ^'Long Swamp" were spraj^ed hy Mr. Holman. 

 One portion was sprayed five times on the following dates: June 6-10, 

 June 26-28, July 18-21, August 2-4, and August 18-19. One part was 

 sprayed only four times. The first plat, which was also spraj^ed in 

 1904, was estimated to have from 80 to 100 per cent of the fruit sound 

 on September 15. On the area sprayed onl}" in 1905 it was estimated 

 that from 70 to 90 per cent of the fruit was sound. On the plat which 

 received the first four applications only, the fruit showed somewhat 

 more rot than on the other plats at picking time. The fruit on these 

 plats had in former years been almost entirely destroyed by rot. 



IMPORTANCE OF EARLY APPLICATIONS. 



The difference in the appearance of the fruit on the sprayed and 

 unspraj^ed plats was very marked bv the middle of Juh\ On the 

 unsprayed plats a large proportion of the fruit was blasted, owing to the 



100— I 



