WOODHOtJSB AND TAYLOR. 125 



:tfi. — Diseases. 

 Soy beans do not appear to sutler much from diseases, 

 though a portion of the chocolate-seeded plot was wilted by 

 Fusarium sp. in 1909, and again in 1911 a portion of one of 

 the chocolate-seeded plots was attacked. A leafspot disease 

 caused by a species of Cercospora produces brown spots on the 

 leaves and weakens the plants somewhat. No very serious 

 damage to the plots at Sabour has been done by insect pests 

 though surface grasshoppers (Chrotogonus trachypterus) do 

 some damage to the young seedlings, and it is necessary to keep 

 picking off the young broods of the Bihar hairy caterpillar 

 (Diacrisia obliqua) as the}- appear. Mr. Dutt has also observed 

 groundnut leaf roller (Anarsia ephippias) on soy beans at Pusa. 

 One of the great merits of the soy beans examined at Sabour is 

 the entire freedom of the stored grain from weevils, a fact which 

 is of interest in view of Shaw's (10) statement that in China 

 " worms and weevils do damage to the seeds after harvest." 



4— DESCRIPTION OF TYPES. 

 It has been thought advisable to describe the chief t}'pes of 

 soy beans isolated up to the present time (season 1911) in order 

 to record the characters of the types on which the chemical selec- 

 tion work has been carried out. In the course of a few years, 

 when the various combinations of the veiy large number of unit 

 characters have been isolated, it is probable that a very large 

 number of types will be known. 



Type I. — " Kala Bhetmas. " 



Stem and secondary branches long, weak, reclining, some 

 tertiaries ascending. Leaves bullate. Stems, leaves and pods 

 with tawny pubescence. Flowers purple 6 to 7mm. long, usually 

 sessile in short racemes. Pods 1*3" to 17' long, 1 — 3 together, 

 seeds black, 4 to 6 b mm. long by 3 to 4 5 mm. broad, elliptical, 

 much flattened, germ yellow. Seeds contained 6"] to 6*6% 

 nitrogen and 11*2 to 13*5% oil in 1911. 



The habit of plants of this type is quite distinct. The main 

 stem and secondary branches lie along the ground, but some of 



