o4 
TABLE 16.—Showing result of treatment for apple scab in quality of fruit. 












oy ae Average for the two trees; per | 
Teva | CN oaAbee Per cent of fruits in— cont oP fruits (ae Pp | Per cent 
num- | of | 
ber. | fruits. First Second Third First Second Third | bie, 
quality. quality. | quality. | quality. quality. | quality. mec 
] 734 31. 61 63. 62 ARTS Noced See ace lAe eee seats 5 re saves 
2 958 29.54 66. 81 3. 65 30. 43 65. 42 4.15.2 |.. ee Se 
3 410 30. 00 66. 83 Sul |osn Sots. Seles eesea ee eee eee 1.95 
+ 63 28. 57 68. 25 3.18 29. 81 67. 02 OoelT ANE Saree 
5 885 29.76 69. 60 AGE leis 2 Sa Wa sods |e cisteins oe oeisl [Sie ee) eNO 
6 91 21.98 68.13 9. 89 25. 41 69. 46 O13" =|. Jsaeneeer 
7 857 35. 01 62. 89 Ue | Speseoecated ISacqaaciscoens boosemcco- 4, 90 
8 278 38. 49 Bio A) 4. 32 35. 86 61. 50 2. 64 4. 68 
9 843 28. 71 65. 24 GiOB ey tes the te Le ae ace | le 9. 96 
10 382 29. 06 59. 95 10. 99 28. 82 63. 59 We OD! se eee 
11 512 22. 46 73.44 AAO. |e od Sag 28 | eat ce ce culsecree eos eee eee 
12 1S! 29.15 67. 84 3. 01 27. 24 69. 40 336) ols caa eee 
13 612 31.37 65. 69 Po ae ee ere ee saeco sia) fy ie Coa 4.25 
14s 39 31. 28 ASII2. \\esbeues see 32. 56 64. 67 200T  e seems 
U6) 9 palpi 39. 25 59: 97 Oi Mae (aioe see Pao sar oatee Se) 6. 38 
16 623 37. 56 60. 35 2.09 38. 65 60. 10 1.25 7.70 
17 115 16. 52 80. 00 S48) Wee owen ee eee beeocecontoslidosaszooe: 8. 69 
18 40 12. 50 75. 00 12. 50 15. 48 78.71 5. 81 2. 50 
19 217 39. 02 61. 29 3.69)" | 2 Ss5 ales Sarai setae = ee sisine]| Se Sen ces eee 
20 34 41.18 50. 00 8. 82 30. 86 59. 76 4538) 1 | cfs ate eeee 
21 619 33. 60 65. 10 L30) Jesse c coisa; maces heen ele scee eee 6. 30 
22 192 33. 85 60. 94 5. 21 33. 66 64.16 2.98) F132 eee 
23 608 35. 36 62. 83 Ite) Be Ee csocedeee lone ae codeine Ince caoas 7.89 
24 258 34. 11 62. 40 3.49 34. 99 62. 70 2.31 6.97 
25 1, 526 55. 64 43. 84 AY Ee ene Sein! Eero aS Seen . 98 
26 541 49.17 48. 61 2. 22 53. 94 45. 09 ot 74 
27 925 28. 65 68. 76 Di Od emi iar ee Oe ee eee | ee eee 9 46 
28 470 14. 89 75. 74 9.37 | 24. 01 7A 1 4. 88 12. 34 
29 841 36. 86 60. 52 DiGQ) |eecsice saceee ete Se Senay | Me teetee = eee 
30 110 37. 27 57. 27 5. 46 30, 91 60.15 2.94". (ofS eee 
31 1, 239 48. 43 50. 77 00" Meare sce tere 3 cite [vaio me eel | eee eres 6. 92 
32 80 35. 00 62. 50 2. 50 47. 60 51. 48 © 92) fie acto meer 
33 45 3.33 82. 22 a eee Ie eee Cie ett cH mic Siac 2. 
34 827 30. 93 66. 75 | 2. 32 30. 05 67. 55 2. 40 6.77 
COMMENTS ON THE RESULT OF THE EXPERIMENT. 
Under this head Prof. Goff reports as follows: 
Considering the small amount of scab and the variation in trees treated alike, few 
deductions are warrantable. Of the materials used in the winter treatment copper 
sulphate appears to have been in some degree beneficial. Bordeaux mixture, which 
was apparently useless in the winter, appears to have been beneficial in the spring 
and summer treatments. ‘There are no indications that the ammoniacal solution of 
copper carbonate, that gave such excellent results in 1889, was beneficial in any case 
the past season. This fungicide was prepared by a different method from the one 
previously used, but if seems hardly probable that this could account for its ap- 
parent lack of efficiency. Copper carbonate in suspension, however, appears to have 
been beneficial in the spring and summer treatments, though in less degree than the 
Bordeaux mixture. 
It is interesting tonote that the most marked results were secured from the use of 
Paris green alone. It was suggested that this material, being a compound of copper, _ 
might possess valuable properties as a fungicide, and the trial of the past season 
indicates that such may be the case. 
In order to give a more satisfactory comparison of the merits of copper carbonate 
in the two methods used and the Bordeaux mixture, the percentages of the fruits in 
the three qualities, respectively, were computed upon the total number of fruits from 
the eight trees sprayed with each of these preparations. This gives a total of 
5,085 fruits sprayed with the ammoniacal copper carbonate, 2,326 with the sus- ' 
pended copper carbonate, and 4,873 with the Bordeaux mixture. Being based on so 
large a number of fruits, these results may be regarded as more reliable than those cal-_ 
