MICHIGAN EXPERIMENT STATION BULLETINS 3:55 



shoots often appear from tlie .stniiii»s of trees in which the disease lias 

 shown itself, and whieh have been cut down. The following year the trees 

 will make but little growth, the leaves will be small, yellowish-green in 

 color, and slender, branching growths will generally appear from the 

 crotches of the branches, forming what may fiu it growers speak of as 

 ''fungous growth." The trees become weaker each year and, at the end of 

 two or three years from the time that they are first attacked, die from the 

 disease. When yellows ap])eais on, perhaps, one or two branches, 

 many growers attempt to save the tree by cutting off the branches in 

 which the disease has appeared, but in no case, so tar as is known, have 

 they been able to save the remainder of the tree. Even though a tree has a 

 full crop of fruit njion it, it should be cut down and burned, on the first ap- 

 pearance of yellows, for, if left to ripcm its fruit, the disease is likely 

 to spread to other trees. By the prompt removal of diseased trees our 

 growers have been able to grow peaches with but little loss from this 

 disease, while those who failed to take prompt action have lost every 

 tree in their orchards. This shows the importance of watching the trees 

 carefully and applying the axe and fire when any symptoms of the disease 

 appear. Borne of our best growers make it a practice to go over their 

 trees once a week, beginning three or four w^eeks before the variety will 

 ripen, and thus are able to detect the disease upon its first appearance. 



While the exact nature of the disease is not known, it is regarded as 

 highly contagious, and no effective remedies have been found for it. It 

 attacks all varieties and appears on all kinds of soil and in orchards 

 under the highest cultivation as well as those in wliich the trees are suffer- 

 ing from a lack of proper food and care. 



PEACH ROSETTE. 



So far as known this disease has never appeared in Michigan. In 

 Georgia and other states where it has been found, it is feared more than 

 yellows as it kills in one year. It differs from yellows in various ways, 

 one of which is that it has no efl'ect on the appearance of the fruit, while 

 in yellows the fiuit is spotted, streaked, higher colored, and ripens 

 froin a few days to three or four weeks earlier than on healthy trees. 



The name rosette is given from the fact that in the spring numerous 

 slender shoots, with small, narrow, yellowish leaves, start out from the 

 branches and, after reaching a length of from three to six inches, the 

 buds in the axils of the leaves also develop shoots that bear still smaller 

 leaves, and in Georgia a third series of branches may form. The leaves on 

 these tufts are very small and may number one hundred or more and, 

 crowded as they are, give the appearance of a rosette. There is no known 

 cause or remedy for the disease and, as it seems highly contagious, trees 

 that show^ the above described characteristics should at once be dug out 

 and burned. 



"little peach." 



In various parts of Allegan and surrounding counties, a disease has 

 appeared in the peach orchards, to which the above name has been 

 given by most growers, although some call it " rosette " and others '' a 

 form of yellows." The trees have, in general, an unhealthy appearance; 

 the new^ growths are short and spindling, the leaves are small, yellowish 



