Effect of insect infestation on stored grain. 2. Studies on husked, hand pounded and milled raw rice, and parboiled milled rice.

Husked, hand-pounded, milled raw rice and parboiled milled rice obtained from the same
strain of paddy (Halubbulu) were infeste<i by Calandra (Sitophil=) ory.ra~ (rice weevil) for
a period of eight months and the changes brought about in the different samples due to
infestation have been studied. The results show that husked rice was infested to a greater
extent than the other samples and developed an unhealthy appearance withi wo months
of infestation. PaTboiled and raw, milled samples of rice weTe found to be least susceptible to
infestation. Infestation of the rice grain increased the loss of starch in the gruel dUling
cooking, the loss being ma."imum in the case of husked rice. An appreciable increase in
the acidity of fat and a decrease in the thianline content due to insect damage were observed.
No significant difference was noted in the other constituents of the grain, such as total
nitrogen and soluble nitrogen: Some correlation was observed between the weight/volume
mho of uncleaned grain and the proportion of dust, loss iu total weight, Joss in thiamine and
iusect population.