i; 
PYRAUSTA MACHGRALIS, 311 



the treatment, which is quite simple and feasible, should be 
made use of in young nurseries of teak when these pests make 
their appearance, 
2. Whilst an attack is in progress, the dried leaves in the 
nursery should be left zz si#z until the laryze have pupated. 
They should then be swept up and burnt to kill off all the 
pupz in them, 
Points tn the life history requiring further observation, 
1. Mr. Hole’s excellent series of observations made in the 
Central Provinces require confirmation in other parts of India, 
and especially the one relating to the hibernation of the larvze 
in the soil during the cold-weather months. This latter 
may be said to be more especially important at the Nilambur 
plantations. 
2. Observations are required as to the exact periods in the 
different teak forests when the worst attacks, z.e., those resulting 
in complete defoliation, are experienced. 
With the above object in view I would Suggest that registers 
be opened showing the name and locality of the particular forest; 
its nature, whether pure or mixed ; climate, whether moist or dry. 
Then, month by month, the attacks of the Pyrausta should be 
entered, the defoliation being shown roughly as so much per 
cent. of the foliage eaten, e.g., 40 per cent., 60 per cent. or com- 
plete defoliation. Atthe end of the year a short summary 
of the weather experienced, whether very dry or unusually 
wet, should be added. 
Such registers kept up for the teak forests of the country 
during a period of five years would be invaluable and would 
enable us to understand the circumstances which lead to bad 
attacks of the pest, and perhaps allow us to prepare for them. 
The Registers should of course distinguish between the 
attacks of Hyblza and Pyrausta, separate columns being opened 
for mixed attacks of both. 
