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1. There is a general remedy which has been found applicable 
to citrus trees affected with diseases due to‘fungi, and that is to 
cut away the diseased portion, taking care to remove every trace 
of it, and, to make sure, a little of the apparently healthy tissue 
surrounding it as well. This has been found successful in bark 
diseases generally, and of course every such diseased portion 
should be burnt. The wound will generally heal, and the further 
progress of the disease be stayed. 
2. In order to prevent infection from stray conidia or from 
filaments of the fungus which may still be in the surrounding 
tissue without external signs, some antiseptic solution should be 
used to dress the wound. 
(а) Mr. W. S. Williams has found that painting with 
carbolic and olive oils mixed in equal proportions, 
will prevent any further extension of the disease. 
As the result of the Florida experiments the following solutions 
are also recommended :— 
(б) Sulphurous acid , in the proportion of 15 to 85 parts of 
water. This may he used to wash or paint the wound, 
or it may be sprayed on the exposed roots. 
(c) Carbolic acid, in the proportion of 1 part of crude acid 
to 1 part of water. This may he used to paint the 
wound or sprayed on the roots when diluted in the 
proportion of 1 to 5. 
( d ) Sidphur wash. This is a generally useful preparation, 
and consists of flowers of sulphur and caustic soda. 
To make a stock solution, place 30 lbs. of flowers of 
sulphur in a wooden vessel and mix it with sufficient 
water (about 12 quarts) to make a stiff paste. Add 
to this 20 lbs. of finely powdered caustic soda, and 
mix thoroughly by vigorous stirring. The mass be¬ 
comes hot, turns brown, boils, and liquefies in a few 
moments. When the violent boiling lias ceased, add 
water to bring it up to 20 gallons, and strain into a 
barrel which can be kept tightly corked. 
Formula—Flowers of sulphur... ... 30 lbs. 
Caustic soda (NaHo) ... 20 lbs. 
Water ... ... ... 20 gallons 
For covering wounds 1 part of this stock solution is to be 
added to 1 part of water, and for spraying the roots 1 part to 10 
of water. 
Even coal tar has been used as a dressiuer. 
3. As imperfect drainage prevents the proper aeration of the 
soil, and as this seems to favour the development of the fungus, 
the removal of the soil and the exposure of the roots to the air 
