IV 



Contents 



Nos. 3 and 4 (January, 1915) 



PAGE 



1. Some Difficulties in the Improvement of Indian Sugarcanes. By 



C. A. Barber. (Plates XIII-XVI and 3 Text-figures) . . 211 



2. The Pea Thrips {Kakothrips rohustus). By C. B. Williams. 



(With 12 Text-figures) 222 



3. The Apple Sucker, with Notes on the Pear Sucker. By P. R. 



Aw ATI. (Plates XVII and XVIII and 21 Text-figures) . 247 



4. Insecticides from a Chemical Standpoint. By W. F. Coopeh 



and W. H. Nuttall 273 



5. Insecticides. By H. M. Lefroy. (With 1 Text-figure) . 280 



6. The Composition of the Coffee Berry and its Relation to the 



Manuring of a Coffee Estate. By Rudolph D. Anstead . 299 



7. The Life-history and Habits of the Greenhouse White Fly 



(Aleyrodes vaporariontm Westd.). By E. Harg reaves. 



(With 56 Text-figures) 303 



8. Infection and Immunity Studies on the Apple and Pear Scab 



Fungi (Venturia inaequalis and F. pinna). By S. P. Wilt- 

 shire. (Plates XIX-XXII) 335 



9. Winter Cover Washes. By A. H. Lees .... 351 



10. A Preliminary Investigation as to the Cause of Rotting of Oranges 



from Brazil. By W. Rushton. (With 1 Text-figure) . . 365 



11. Effects produced by Sucking Insects and Red Spider upon 



Potato Foliage. By A. S. Horne and H. M. Lefroy. 

 (Plates XXIII-XXVIT) 370 



12. Notes (with 1 Text-figure) 387 



13. Review ... 403 



