Mr. Ghosh. 
808 PROCEEDINGS OF THE SECOND ENTOMOLOGICAL MEETING 
been a bad pest of stored grain recently in Madras and has been con- 
trolled quite successfully by treatment with carbon bisulphide. 
In Northern India work on stored wheat pests has also been done 
in the Punjab and an account of that has just been published by Messrs. 
Barnes and Grove, so that all the information to date on that subject 
is already available. I may add that I have had some reprints made 
separately of the entomological part of this Memoir and these reprints 
are available for use of the Entomological Staffs in the Provinces or 
elsewhere. 
At Peshawar also, Mr. Robertson-Brown and myself are testing a 
local type of timber-built granary against the more usual type built of 
mud, but this experiment is not concluded. 
Turning to our own work at Pusa, you will have seen by our Annual 
Reports that we have been carrying out various experiments on the 
protection of stored grain against insect attack. In 1915 we did these 
on a small scale, with one-pound lots of grain in glass jars; that series 
of experiments gave us some information and enabled us to reject many 
failures. In 1916 we repeated the more successful experiments on a 
larger scale, using guony bags and earthen jars as containers for the 
grain ; and this year we intend to try the methods, hitherto found suc- 
cessful, on a still larger scale. But, until we have thoroughly tested 
methods on a large scale, it is rather premature to say much about them. 
These experiments have been made in the Pusa Insectary, so I will 
ask Mr. Ghosh to give you a brief account of them so far as they have 
gone, but I must repeat that they are not yet completed, so that we are 
not prepared as yet to say that we are ina position to recommend the 
best preventive measures ; and also, of course, it is possible that any 
measures found successful here may require modification under different 
climatic or other conditions. 
For the last two years we have been carrying on experiments to 
endeavour to find out a successful method or methods of preserving 
grain in store against insect pests. We have included in our experiments 
(1) pulses, by which I mean pulse seeds, 
(2) rice, by which I mean husked rice, 
(3) wheat. 
Without going into details of the experiments I only give the results 
of those which have been found successful. 
Pulses, in our experience here, have to be protected against Bruchus 
chinensis which does the principal and very serious damage in store. 
We have never found it affecting grain in field. It breeds continuously 
in store, the life-cycle ordinarily being three to four weeks. 
