' INSTITUTE, PUSA, FOR 1917-18 79 



nigrum and Gloeosporium piperatum on chillies, and has 

 found that these two fungi are identical and that they are 

 the conidial forms of Glomerella cingulata (Stoneman) 

 Spauld. and v. Schrenk which is considered to be synony- 

 mous with Glomerella piperata (Stoneman) Spauld. and v. 

 Schrenk. 



A second disease of chillies, causing blossom and twig 

 rot, was discovered during the progress of the investigation 

 on anthracnose. It did as much damage as the chilli die- 

 back. This disease is due to a fungus which has been 

 identified as Choanephora cucurbitarum (B. and Rav.) 

 Thaxt. It has not been previously known to occur in India 

 but in America it is a serious pest of cucurbits. 



(6) Fruit diseases. The spraying of peach orchards 

 on the Government farm at Taru, North- West Frontier 

 Province, against peach leaf curl was continued during the 

 year under review. The difference between the sprayed 

 orchards and unsprayed orchards became very marked as 

 the season advanced and proved conclusively the advantage 

 of spraying against this disease. 



Specimens of crown gall on quince and pomegranate 

 were collected in Peshawar orchards, this being the first 

 time this destructive disease has been recognized in India. 



A number of enquiries from apple orchards in Kumaun 

 resulted in the following diseases of apple being identi- 

 fied : — 



Root rot of apple due to the attack of Rosellinia. This 

 fungus is well known as the cause of extensive damage in 

 orchards in Europe and elsewhere. It appears to be most 

 severe in strongly acid soils and an analysis of the soil from 

 the orchard in question showed a marked deficiency of lime. 



Apple cracking and branch blister. The cracking of 

 apple fruits, which is common in these orchards, is due to 

 the fungus Coniothecium choinatosporium Corda. This 

 fungus has recently been the subject of investigation in 

 South Africa and Europe— the parasite has been obtained 

 in culture and will be kept under observation. A system of 



