20, 2 Lee and Shino: Citrus-canker Control Experiments 147 
is so small as to be considered negligible by many, yet in large 
orchards could amount to a tangible loss. 
TABLE 14.—Showing the weight of cankered fruits as compared with that - 
of normal fruits. . 
* 
| All fruits. Canker-free fruits. Cankered fruits. 
Plat No. 
Num- | Total |Average|) Num- | Total |Average| Num- | Total |Average 
ber. | weight.|weight.-| ber. | weight.| weight.| ber. | weight. | weight. 
Kilos. Kilo, Kilos. Kilo. Kilos, Kilo. 
Nicci Sree 2,382 | 416.40) 0.1742 1,318 | 2382.40} 0.1770 1,069 ; 184.00 | 0.1720 
A aps ea ee 2,692 | 471.85 | 0.1748 1,893 | 341.80} 0.1805 799 | 129.55 | 0.1621 
GE ee emcees 2,525 | 310.00 | 0,1227 2,292 | 274.70 | 0.1198 233 35.30 | 0.1515 
OS 1,169 | 189.40} 0.1620 1,094 | 180.00| 0.1645 75 9.40 | 0, 1258 
ee RS 1,712 | 298.25 | 0.1742 1,395 | 247.10 | 0.1771 317 51.15 | 0.1618 
ena aes 2,668 | 457.20 | 0.1713 607 | 106.35 | 0.1752 2,061 | 350.85 | 0.1702 
f RON Cae 8,389 | 631.95 | 0.1864 2,180 | 408.85 | 0.1896 1,259 | 228.10 | 0.1811 
SB ehiides aden 2,963 | 514.15 | 0.1735 1,938 | 847.40 | 0.1792 1,025 | 166.75 | 0. 1626 
Ds css 2 s02 8,256 | 578.80] 0.1762 1,789 | 822.90 | 0.1856 1,517 | 250.90 | 0.1653 
S| fee cena 4,601 | 796.50} 0.1781 652 | 116.10} 0.1780 8,949 | 680.40 | 0.1728 
UA oedasenuesse: 2,863 | 419.10} 0.1778 91 12.30} 0.1340 2,272 | 406.80 | 0.1789 
s) agi 2 RS 2,487 | 441.16) 0.1778 81 14.80 | 0.1827 2,406 | 426.35 | 0.1772 
1B. cecinene 695 | 120.50} 0.1778 489 86.05 | 0.1759 206 34.45 | 0.1672 
if Rete g peered 1,224 | 212.40 0.1785 739 | 126.25 | 0.1708 485 86.15 | 0.1776 
si Reta bo eee 974 | 175.40} 0.1800 504 91.90 | 0.1828 470 83.50 | 0.1776 
PP Se ee 1,299 | 228.90 | 0.1762 935 | 168.90 | 0.1752 364 65.00 | 0.1785 
Dd sh alcepl gigi ni-ainsas 1,329 , 248.10) 0.1829 453 87.30 | 0.1927 876 | 155.80 ; 0.1778 
1 | EN Se cece 2,271 | 404.10 | 0.1778 438 80.60 | 0.1840 | 1,833 | 323.50 | 0.1764 
EP toh cues Sates 524 69.15 | 0.1819 388 4.85 | 0.1276 486 64. 30 | 0, 1823 
Total____| 40,523 |6,972.80 | 0.1720| 18,821 |8,240.55 | 0.1721 | 21,702 |3, 782.25 | 0.1719 
Data concerning a possible loss in the number of fruits are 
available from Table 8; although varying orchard conditions 
affect these data, Table 8 shows no loss upon untreated plats 
as compared with treated plats. Nevertheless, the observations 
made in the early part of the spraying season, which recorded 
a fruit drop, indicate that there must be some loss in the number 
of fruits due to canker, although it is so small as not to be 
apparent at the end of the season. 
Fruits affected with canker sometimes crack and split, but 
fruits whose surfaces are normal frequently do this also. How- 
ever, cases have been seen where such splitting is very closely 
connected with the canker lesions. Two such cases are shown 
in Plate 4, fig. 1. Another injury due to canker, but seen very 
infrequently, is the infection with fruit-rot organisms, following 
citrus-canker lesions. Such cases are not at all common, how- 
ever. Rot following a canker infection is shown in Plate 4, 
fig. 2. 
These statements and figures of course apply only to the 
Washington navels, and varieties of similar susceptibility, such 
