LIME SULFUR
A combination of hydrate lime (CaO) mixed with sulfur. Lime sulfur is extremely water soluble, but incompatible with other pesticides due to it's alkaline reaction when diluted with water. It should be used by itself.
-- for one hour, then allow to cool and settle. The strained, amber fluid is lime sulfur. It can also be purchased pre-made.
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lime sulfur
A fungicide and miticide made up of calcium and sulfur. It is highly corrosive and should be handled carefully.
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Lime sulfur is made by boiling lime and sulfur together. The mixture is used as a dormant spray on fruit trees to control diseases such as blight anthracnose, powdery mildew and some insects including scales, thrips and eriophyid mites.
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Fungicides such as sulfur, lime sulfur, karathane, Acti-dione PM, Benomyl, and Funginex are effective on powdery mildew. Frequent applications and thorough coverage are essential.
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Sulfur, lime sulfur Esfenvalerate and Permethrin are effective. Spray must thoroughly cover leaf undersides and be repeated weekly. Garden peppers and eggplants may be infested, although no damage is done to these Crops.
When the tree has no leaves and before the buds start to open in spring, spray with dormant oil, which contains lime sulfur, to kill overwintering insects and fungal diseases. Ideally apply two or three times.
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One can use fungicide during damp weather - captan, copper, or lime sulfur are most effective when you follow the instructions carefully. One can also use baking soda (sodium bicarbonate) at a rate of one teaspoon to one gallon.
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Preventive sprays such as horticultural oil and lime sulfur
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I have seen powdery mildew, but this is easily controlled with benomyl, oil or lime sulfur (the latter two will discolor blossoms).
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Disinfecting sprays such as lime sulfur or funginex ...
 See also: Plant, Sulfur, Spring, Pesticide, Fungi
  
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