52 EXPERIMENT STATION RECORD. [Vol. 37 



of the cankered limbs, disinfecting and covering of wounds, and careful 

 observation of all trees for at least two years after the completion of the 

 above treatment. 



[Notes on some plant diseases] {New Mexico Stn. Rpt. 1916, pp. 25, 26). — 

 In continuation of investigations on the chlorosis of pear trees (E. S. R.. 32, 

 p. 641), it is stated that trees treated with ferrous sulphate in 1914-15 showed 

 some benefit from plugging the salt in holes bored in the trees. Where young 

 pear trees were sprayed in 1915 with a 1 per cent solution of ferrous sulphate, 

 they continued to show in 1916 the same yellow color exhibited in the previous 

 year. 



It is stated that pear blight was more serious in 1915 than in any season 

 previously noted. 



Diseases of the brambles and methods of controlling them, C. R. Orton 

 {Proc. State Hort. A.ssoc. Pcnn., 57 (1916), pp. 66-11, pis. 3).— This is a discus- 

 sion of various diseases of blackberry, raspberry, and dewberry, with recom- 

 mendations regardinr; nicisures for their control. 



Direct bearer grapevines in relation to disease, G. Damiasso and S. Sunn 

 (Riviata [Concglinnn], 5. scr., 21 {1915), No. 15, pp. S37-3.'fl : abs. in InteiTtat. 

 Iivit. Afjr. [Rome], Mo. liul. Agr. Intel, and Plant Diseases, 6 (1915), No. 9, pp. 

 1257-1259). — Examination of direct bearer vines in July. 1915, at the Royal 

 College of Enology at Conegliano showe<l that in spite of the unfavorable 

 sea.son none of the vines were nttacketl by Permiospora or by Oldlnni. Some 

 showed melnnose (Srptoria nmpclina), .some anthracnose ((llocosporiuni ampetu- 

 phuijum). A number of varieties are reported upon in detail as regards tlie 

 prescixe or absence of the several d'seases under observation, a gratifying 

 degree of resistance being apparent in most instances. 



The pink disease of cacao. .T. Ij. Rorer (Bui. Dept. Agr. Trinidad and To- 

 bago, 15 (li)16). Xo. 3, pp. t>6-8D, pi. 1). — From reports of studies or observa- 

 tions in several parts of the world, tl.e conclusion is reache<l that the pink 

 di.sease, whether in the East or in the West, Is caused by the same fungus. 

 Cortidum .fdlmonicolor. The d:sea.se as It occurs in very characteristic form 

 on cacao is described. In the East, the fungus has been found on 141 different 

 species of plants. 



Careful removal of all affected portions is said to be effective where its 

 occurrence is sporadic. In case of old trees or where many are affected, good 

 results are obtained by treating with tar on the first appearance of the symp- 

 toms in each case. 



Tea roots, A. C. Tunstall (Indian Tea Assoc. [Pamphlet] 1 (1916), pp. 22. 

 pis. 5, figs. 11). — This pamphlet discusses first the characters and behavior of 

 healthy tea roots and, second, some root diseases, their transmi.sslon, their 

 identification, and general plans for their treatment The disease fungi men- 

 tioned Include Diplodia, Rosellinla, Hymenochccte noxia, Fomes Iticidus, Vstu- 

 lina iovntn. and Thi/ridaria tarda. 



XJstulina zonata, a fungus affecting Hevea brasiliensis, A. Shakplks 

 (Dept. Agr. Fed. Malag Stales But. 2.'> (1916), pp. 21. pis. 10).— \\. Is stateil 

 that during the past two years the fungus {/. zonata has become an important 

 factor in the Fedemted Malay States. It is the cause of a collar and root 

 disease which develops typically in rubber trees over 10 years of age but has 

 been found in trees aged from 5 to 8 years. The trouble was noted hy the 

 author in 1913, but evidence recently obtained suggests that it has been present 

 in this region for several years, perhaps since 1907. The typical dry rot pro- 

 duced by V. zonata is said to be unmistakable, the wood in advanced cases 

 crumbling readily on slight pressure, (control mea.sures consist in thoroughly 

 cleaning out the portions of the tree that have been cut away tluring the 



