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| _Hollyhock rust._--Fig. 212. Eradicate the wild mallow _(Malva | ||
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Chapter 3. PROTECTING PLANTS FROM THINGS THAT PREY ON THEM | 
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rotundifolia)._ Remove all hollyhock leaves as soon as they show signs of rust. Spray several times with bordeaux mixture, taking care to cover both sides of leaves.
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| _Grape black-rot._--Remove all "mummies" that cling to the arms at |  |
_Lettuce drop or rot._--This is a fungous disease often destructive in |