INSTITUTE AND COLLEGE, PUSA, FOR 1911-12. 67 



agricultural classes the principles of Economic Entomology 

 must necessarily be slow. Pusa has continued to assist the 

 Provinces, whenever requested, by checking and advising 

 upon the work of the assistants and in many cases the techni- 

 cal work has been referred to Pusa, leaving the assistants 

 free to carry out practical work in the field. 



In Madras a vigorous campaign was carried on against 

 the Deccan Grasshopper, Colemania sphenarioides, Bol. 

 Bagging and ploughing of infested lands were carried out 

 and a leaflet detailing the methods to be adopted against the 

 hopper was issued. Light -trap experiments for the moths 

 of the Hairy Caterpillars were also continued. Eri Silk 

 culture was started and its suitability as a cottage industry 

 for Southern India tested. 



In the Central Provinces, the experiments against white- 

 ants were continued in collaboration with the Deputy 

 Director of Agriculture, Northern Circle, Hoshangabad. 

 From past experiments with the mound-building form of 

 termites, oiling the nest with low grade kerosine oil (as 

 ordinarily procurable in the bazaars) was found most effec- 

 tive. Tests were also made with the " Universal Ant Ex- 

 terminator." Arrangements were also made with the 

 Director of Agriculture, Central Provinces, for the despatch 

 of parasites of the Cotton Bollworms to Lyallpur, and for 

 some time the Entomological Assistant was engaged in col- 

 lecting and sending out the parasitized bollworms to Pusa 

 and Lyallpur. Early in August information was received 

 from the Director of Agriculture, Punjab, of a possible 

 outbreak of the bollworms. Arrangements were therefore 

 made for sending out the parasites from Surat and Nagpur 

 to an assistant from Pusa to organise the work at Lyallpur. 

 An acre under cotton and two acres under hhindi were also 

 sown at Pusa to establish the bollworm parasites. By the 

 end of October the parasite {Rhogas lefroyi) was well 

 established in the Punjab and a leaflet was issued in the 

 vernacular of the Province, explaining how the bollworm 

 should be dealt with. 



