PROCEEDINGS OF THE SECOND ENTOMOLOGICAL MEETING 309 
It has been found that the small variety of pea, Piswm arvense, is 
not affected by this pest, though the larger varieties of peas, gram, 
Arhar (Cajanus indicus), Lentil, Khesari (Lathyrus sativus), Mung 
(Phaseolus radiatus mungo), Bora (Vigna catjang) and Bakla (Vicia 
faba) are all liable to serious damage. 
In the present state of our experiments we recommend keeping the 
pulses covered with sand, coarse or fine, and they will remain safe. 
The other pulse beetle of which we have experience is Bruchus affinis 
which affects only peas while still inside the pods in the field. This pest 
does not breed in store. That fact was mentioned while discussing 
the pests of peas. Damage can be prevented by fumigating the seeds 
with carbon bisulphide as soon as harvested or storing the seeds in air- 
tight vessels with naphthaline. Treatment with naphthaline is, how- 
ever, unsuitable in the case of seeds required for consumption after- 
wards. The seeds to be sown if untreated should be thrown into water 
and only those which sink should be sown. 
Rice should be mixed with dry powdered lime at the rate of 100 
Ib. rice and 24 Ib. lime and stored in any way one likes in gunny bags, 
jars or bins. It will remain free from infestation by pests. 
Wheat. First of all various methods were tried with small lots of 
wheat—two to four lb.—in airtight glass jars, in gunny bags and in 
earthen pots, earthen pots and gunny bags being the two kinds of re- 
ceptacles ordinarily used by people for storing small quantities. Many 
of the methods were rejected and those only which promised success 
were tried on a small storage scale next year. Many of the results 
which seemed probable on the first year’s experiments were upset. 
But some important differences in the habits of the principal pests 
were clearly demonstrated. The principal pests here are (1) Calandra 
oryze and (2) Rhizopertha dominica. In the Punjab in addition to 
these two there is a species of Trogoderma but of this I have not got 
much experience. 
Rhizopertha cannot breed where there is free access of air, but under 
the reverse conditions it is capable of doing much more damage than 
Calandra. Air and light retard Calandra and if one can take the trouble 
of exposing the grain to air and light at frequent intervals very little 
damage is done. But this is not practicable when large quantities have 
to be dealt with. This year we propose to try a method of outdoor 
storage under conditions which will make it impossible for Rhizopertha 
to breed and which will keep the grain exposed to the natural changes 
of climatic conditions. If this be found successful it will be applicable 
both to storage in bulk and in small quantities, and it will enable a man 
to make a profit of about 5 to 8 per cent. simply on the increase of the 
