W or maid . — ‘ Brown Rot ’ Diseases of Fruit Trees . 403 
1916. Hesler, L. R. : Diseases of the Plum: Brown Rot. New York Agric. Dept. Bui., 79, 
pp. 1 192-5. 
Spinks, G. T. : A Black Rot of Apples. Ann. Rept. Agric. and Hort. Res. Sta., Long 
Ashton, Bristol, 1916, pp. 153-5. 
Mansfield, A. B. : Ripe Rot of Stone Fruits. Jour. Agr. (New Zeal.), vol. xii, No. 3, 
pp. 214-16. 
1917 . Peglion, V.: Atti R. Acad. Lincei, Rend. Cl. Sci. Fis., Mat. e Nat., 5 a ser., vol. xxvi, No. 12, 
pp. 637-41. (A Gummosis of Apricot. Abstract in Exp. Sta. Rec., vol. xxxviii, p. 650, 
1918.) 
Wormald, H. : A Blossom Wilt and Canker of Apple Trees. Ann. Applied Biol., vol. iii, 
No. 4, April, 1917, pp. 159-204. 
— : The ‘Blossom Wilt and Canker’ Disease of Apple Trees. Jour. Bd. Agric., 
vol. xxiv, No. 5, Aug., 1917, pp. 504-13. 
1918. Cockayne, A. H. : Report of the Biologist : Plant Diseases. New Zealand Dept, of Agric., 
Industries, and Commerce, Ann. Rept. for 1917-18, p. 38. 
Cunningham, G. H.: Brown Rot in Cherries controlled. Jour. Agr. (New Zeal.), 
vol. xvi, No. 1, pp. 38-39. 
McCubbin, W. A. : Peach Canker. Dom. of Canada Dept. Agric. Bui. 37, 1918. 
Wormald, H. : ‘Brown Rot* of Apples. Jour. Bd. Agric., vol. xxv, No. 3, June, 1918, 
pp. 299-302. 
A ‘ Wither Tip’ of Plum Trees. Ann. Applied Biol., vol. v, No. 1, July, 
1918, pp. 28-59. 
1919. McCubbin, W. A. : Brown Rot of Stone Fruits. Agric. Gaz. of Canada, May, 1919, 
pp. 429-32. ^ 
EXPLANATION OF PLATES XXV AND XXVI. 
Illustrating Mr. Wormald’s paper on the ‘Brown Rot’ Diseases of Fruit Trees. 
PLATE XXV. 
Fig. 1. Plums naturally infected, above with Monilia cinerea, the two below with M. fructigena. 
Fig. 2. Plums naturally infected, the one on the right with M fructigena , the one on the left 
with both M. fructigena (right side) and M. cinerea (left side). 
Fig. 3. Fruiting spur of apple bearing pustules of M. fructigena in late summer ; infection 
occurred through the fruit, the stalk of which is seen at the upper end. 
Fig. 4. Apple (var. Bramley’s Seedling) inoculated with pure cultures, on the left with M. frucli- 
gena , on the right with M. cinerea f. mali : result on seventh day after inoculation. At this stage 
the dark rings round the lenticels on the side infected with M. cinerea f. mali are a characteristic 
feature. 
Fig. 5. The apple shown in Fig. 4, but 13 days later; the right side of the apple was quite 
black by this time. 
Fig. 6. Apple inoculated from pure cultures, on the right with M. cinerea f. mali, on the left 
with M. cinerea f. pruni. 
Fig. 7. Apple inoculated from pure cultures with two strains of M. fructigena, on the left 
a strain from a plum, on the right a strain from an apple affected with ‘ Black Rot ’. 
Fig. 8. On the left a plum inoculated from a pure culture of M. fructigena, on the right a plum 
inoculated from a pure culture of M. cinerea. Control plum, from the same tree, in the centre. 
Fig. 9. Plum inoculated from pure cultures, on the left with M. fructigena , on the right with 
M. cinerea. (The experiments illustrated by Figs. 8 and 9 were carried out in the open, the 
specimens being removed from the tree immediately before the photographs were taken.) 
PLATE XXVI. 
Fig. 10. Above, on the left, an inflorescence of an apple tree (var. Lord Derby), of which 
a single flower had been inoculated with conidia from a pure culture of M. cinerea f. mali ; infection 
has reached the base of the spur and a canker is just making its appearance on the stem. Result 
16 days after inoculation. 
G g 
