95 



Prevention. The preventive measures that may be taken have been 

 foreshadowed in the description of the disease. First of all destroy 

 all the wild mallow in the vicinity. This may be 

 done with " elbow grease/* which, when properly 

 applied, is very effective. I have noticed that 



where the disease is ram- 



Fiff. 109. Spores of the Mallow Rust, TT n i i M. 



Puccinia, ,,talvaceanim. These pant On JbLOllynOCKS it IS- 

 spores, which are elongated or a l most invariably to be 



found on wild mallows 



somewhat fusiform and have a 



slight constriction at the middle, 



are massed together in scattered, . . 



round, and raised compact brown in tne Vicinity, and L am 



sure that the disease in 



son, which, however, are elon- 

 gated on the stalks and petioles. 

 These sori have a habit of falling 

 away and leaving scars or holes, 

 in which case the ground under- 

 neath the plant becomes a breed- ,-, 

 ing-place for the disease. The tnrOUgn the agency OI 

 smooth yellowish-brown spores, j.\\ i WPPP! anrl if fhp 

 measuring 15-25 x 35-75^, are M > i 

 borne on pedicels once to twice 



this State is carried over 

 from season to season* 



as long as themselves, 

 are no paraphyses. 



There 



weed be kept down the 

 Hollyhocks will be bene- 

 fited. In my opinion it 



is a good plan to keep the Hollyhocks from seeding too freely. If a 



considerable number of the seed pods are cut as soon as the blossoms. 



are past i.e., of course, supposing the 



blossoms are allowed to remain on the plant 



as garden ornaments, a use to which they 



are so eminently adapted, the result will 



be a good growth of foliage. This will 



mean a good supply of food stored up in the 



roots for next season, with the result that the 



plants will start vigorously the next spring. 

 The plants are such rank growers that it 



is best to give them a good supply of food. 



Any stinting in the growth is sure to lead 



to greater liability to disease. It will be 



noted that the smaller and weaker plants 



are the first and the worst sufferers from 



the disease. 



When the summer's growth is over, des- 



troy all the old foliage and the stalks. 

 The symptoms of the disease are pro- 



minent ones, i.e., the growth of the above- 



mentioned warts, and this leads to a measure 



that may be of use in some cases, namely, 



the plucking of the leaves of the Hollyhock Fi &- HO.-Teleuto spore of the hollyhock 

 P r r. -i rust > germinating and producing 



as last as they become SOUrceS Or danger. secondary or promycelial spores. The 



Do not allow any of the warts to assume a 



brown colour. Up to the time the warts 



begin to turn brown they are not spread- 



ing the disease, and the leaf is still of use 



to the plant. Soon after they become brown 



they are capable of spreading the disease, and they should be 



removed by plucking the leaf they are on. 



spores most active in spreading the- 

 disease. They sometimes appear in 

 such numbers as to give the surface 

 of the rust pustules a frosted appear- 

 ance. 



