PROCEEDINGS OF THE SECOND ENTOMOLOGICAL MEETING 143 
in India, and for this we require ample material in the first place. As 
regards the larve, these appear to be very similar, but I expect that 
we shall be able to find distinctions when we are able to study sufficient 
material. 
The position at present is that we appear to have in India two or 
more species of Diatrea which are especially attached to sugarcane 
but which are less commonly found in maize, juwar and so on, and we 
have also Chilo simplex which is not rarely found in sugarcane but which 
is primarily a pest of jwar and maize. The discrimination of these 
insects is not merely an academic matter of interest only to the 
systematic worker, but it is a matter of very practical value, when we 
‘come to deal with control by means of rotation of crops, or by trap-crops. 
I hope, therefore, that you will all assist by sending us ample material 
in the way of these borers. As these species of Diatrewa and Chilo have 
been so confused together, we shall have to consider them for the time 
being simply as “ Borers.” 
As regards their control, the cutting out of “ dead-hearts ’’ has been 
advocated and practised for many years and doubtless some of the 
Provincial delegates will be able to tell us something about that. 
The collection of the egg-masses of the moths ig also quite practicable, 
at least in the case of young plants. This is done regularly on the Farm 
at Taru, near Peshawar, the fields of young cane being gone over re- 
gularly every day and the egg-masses removed. If these ege-masses 
are placed in suitable receptacles, so that any parasites may escape, 
whilst the young larve will be unable to do so, this system of control 
may be improved still further. However, if hyperparasites are present, 
this method may do more harm than good; so here again we come up 
against the necessity for proper systematic work as being the basis of 
effective control-measures. 
Some demonstration work in cutting out of “ dead-hearts ”’ has been 
done in the Punjab. 
In the Punjab there is a good deal of trouble from borers in sugar- Mr. M. M. Lal. 
cane. Maize and Sorghum were tried as trap-crops but it was found 
that the attack in the sugarcane was not reduced to any great extent. 
That is what we should expect if the borers in cane are different from Mr. Fletcher. 
those in maize and juar. 
The cutting-out of “ dead-hearts”’ was tried next and was found Mr. M. M, Lal. 
successful. In the Punjab cane is sown in April and, if the cutting 
out is commenced as soon as the borer is noticed, the borer is controlled 
efficiently. Apart from the control of borers, another advantage which 
was derived from this practice was that the plants, from which the 
““dead-hearts ” were cut out, tillered very well. The gur prepared 
