CITRUS MELANOSE AND ITS CONTROL 
53 
Commercial Bordeaux preparations gave satisfactory results, but 
not as good as the homemade material. This is doubtless due in 
part at least to the fact that much of the commercial material was 
used at the rate of a 2-2-50 dilution. Similar-strength homemade 
Bordeaux mixture is noticeably less effective than the full-strength 
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Fig,. 15. — Comparison of grading of fruit with respect to melanose blemish in 
sprayed and unsprayed grapefruit groves in 1923. Bordeaux-oil emulsion was 
used by the owners 
3-3-50 formula. As has been the case in the past, better control was 
obtained on oranges than on grapefruit. 
The weather during the latter half of March and the first week of 
April was accompanied by occasional general light rains. These 
rains resulted in a moderate melanose infection throughout the citrus 
belt, which prevented spraying results from being as marked as in 
former years. However, melanose infection throughout the State for 
