144 The Philippine Journal of Science 1922 
fungicide applications is that fungi, parasitic upon injurious 
insects, are killed by the spray applications. The insects, when 
not limited by the parasitic fungi, increase enormously, and 
such species as secrete honey dew are then followed by sooty mold. 
TABLE 13.—Showing the results of the spray applications in increasing 
other diseases. 
Affected fruits. 
Plat 8 : Red-spider 
No. pray mixture employed. a affection of 
ooty Mela- fruits. 
mold- nose. 
Per cent. | Per cent. 
1 | Canker removed by pruning; no spraying -------------- a O18 20 ce None. 
2 | Canker removed by pruning; lime sulphur 1-40 --------- 1.37 4.04 Do. 
3 | Canker removed by pruning; Bordeaux mixture 4-4-50- 9.85 42.59 | All fruits. 
4| Canker removed by pruning; Bordeaux mixture neu- 10.35 63. 38 Do. 
tral. 
5 | Canker removed by pruning; Burgundy mixture-------- 4.20 61.03 Do. 
6 | No pruning; lime sulphur 1-40 --__---------------------- 0.59 0.59 Do. 
7 | No pruning; Bordeaux mixture 4-4-50 -.---------------- 14. 60 87.65 Do. 
8 | No pruning; Bordeaux mixture neutral-._-.------------- 7.79 54. 43 Do. 
9 | No pruning; Burgundy mixture_--_-.--.----------------- 4,94 41.86 Do. 
10 | No pruning; no spraying; control -.___._---------------- 1.49 2.32 | Very little. 
- 11 | No pruning; formalin 1-100 -----..--.-.----------------- Oy Biles so 23 ae. None, 
12 | No pruning; no spraying; control -_-- -_----------------- 0.20 0. 40 Do. 
13°| Rough pruning; Bordeaux mixture neutral ------------- 2.58 61.15 | All fruits. 
14 | Rough pruning; Burgundy mixture ._-._---.------------ 2.85 53, 26 Do. 
15 | Rough pruning; lime sulphur -------_---..-------------- 0.82 2:15 Do. 
16 | Rough pruning; Bordeaux mixture 4-4-50-_------------- 24,94 88. 79 Do. 
17 | Rough pruning; no spraying; control -.----------------- 2.18 4.13 | Very little. 
18 | No pruning; no spraying; control ta Sie ae Op i 1.36 | None. 
19 gf Saeennyer ee arg pa ee Rare ae ea Sp ome SE ae 0.38 0.76 Do. 
An unexpected development was the increase in blemish 
upon the fruits which was identical in appearance with the . 
melanose injury due to Phomopsis citri Fawcett. The increase 
of a fungus disease with no insect relationships, following the 
application of fungicides, is notably peculiar. In this csae a 
greater percentage of fruits affected with melanose is quite 
definitely correlated with the neutral Bordeaux mixture appli- 
cations. Burgundy mixture was somewhat less injurious, while 
Bordeaux 44-50 mixture was the least injurious of the copper 
sprays. Lime-sulphur and formalin applications resulted in 
little or none of this blemish. No attempt will be made to put 
forward an explanation for this; it is sufficient to call attention 
to this fact: that a blemish similar to melanose increased follow- 
ing applications of the copper-precipitate mixtures. 
- The third striking feature, very noticeable on the spray plats, 
was the increase of red spider following the applications of the 
