658 EXPErJMENT STATION RECORD. [Vol.43 



Phyllosticta leaf spot and damping-oflf of snapdragons, E. P. Guba and 

 P. J. ANDiaisoN (Phytopathology, D {1919), No. 8, pp. 315-325, figs. S).— During 

 the summer of 1918 a leaf spot of cultivated snapdragon was observed at the 

 Massachusetts Agricultural College, the spots being much larger and quite 

 different from those produced by the anthracnose fungus {Colletotrichum 

 antirrhini). A study was made of the disease, wliich was found to be due to 

 a species of Phyllosticta, previously reported as occurring in Europe. The 

 cultural characters of the organism and the results of infection experiments 

 are described at length. 



Experiments were conducted which indicate that all types of the disease, with 

 the exception of «laniping-off, may be controlled by spraying with Bordeaux mix- 

 ture 4 : 4 : 50. In checking the disease, it is said to be essential that the air and 

 soil be kept as dry as is consistent with the good growth of the plants. 



The chestnut bark disease and the chestnut market in Massachusetts, 

 F. W. Rane (Boston: State, 1916, pp. 30, i)ls. 4, fig. 1). — An account is given of 

 the history of the chestnut bark disease (particularly in its relation to the chest- 

 nut market in Massachusetts), its distribution in the State, detection and control 

 of the disease, and economic utilization of the trees affected. 



White pine blister rust in New Hampshire (N. H. State Forestry Dept. 

 Circ. 10 (1920), pp. -'/). — This circular is issued in cooperation witli the Bureau 

 of Plant Industry, U. S. Department of Agriculture. 



It is stated that tlie white pine blister rust is generally distributed throughout 

 the pine regions of New Hampshire, large areas of infected pines being found 

 each year in towns net previously examined. The history and distribution of 

 the disease is outlined. Accounts are given of field work in 1917, 1918. and 

 1919, and of the expenses by towns during 1918 and 1919, with a summary of 

 work related to control of blister rust. 



Report on the Avhite pine blister rust, State of Rhode Island, 1919, in 

 cooperation with the Bureau of Plant Industry, U. S. Department of Agri- 

 culture, R. A. Sheals (Ann. Rpt. Bd. Agr. R. I., 34 (1919), pp. 13-32).— White 

 pine blister rust was first discovered in Rhode Island in 1912, a single diseased 

 pine being found in a nursery among seedlings imported from Europe. The entire 

 shipment was destroyed, and scouting of nurseries and pine plantations failed 

 to show any blister rust infections. In 1916, a diseased pine was found on the 

 Island of Newport, and scattered Ribes infections were located in practically 

 every town in the State. An eradication area was established and afterwards 

 enlarged. Details are given of systematic attempts to eradicate the disease. 



The preliminary scouting method as here employed is regarded as practical 

 and successful, except in areas where Ribes is abundant, such areas being very 

 suitable to the close formation crew method. The plans for 1920 are outlined. 



Fungoid diseases of rubber in southern India, W. MacRae (Planters' 

 Chron., 13 (1918), No. 23, pp. 395-401).— In this address, delivered at the Rub- 

 ber Planters' Conference at Cochin, it was stated that under conditions very 

 favorable to infection Phytophthora faberi (the fungus causing cacao pod rot 

 and stem canker, also claimed to cause fruit rot, leaf fall, and bark rot of 

 Hevea in Ceylon) more readily infected fruits in the author's experiments than 

 did the form considered by him as a different species and tentatively desig- 

 nated as P. meadU. The probable identity and dissemination of the fungus 

 are discussed in connection with preventive measures. 



Attention was given also to bark rot and measures to prevent or lessen 

 damage from this source. Izal is a powerful fungicide so far as this disease 

 is concerned and can be used in dilute solutions, though 5 per cent is the con- 

 centration commonly used during the monsoon. Other applications for the 

 tapping rot are discussed. 



