B R Subba Rao
Articles written in Proceedings – Section B
Volume 44 Issue 3 September 1956 pp 137-147
Volume 46 Issue 4 October 1957 pp 241-246
2. The degree of parasitism was observed to be about 62% in case of
3. In spite of the two observations cited above, the pest was found to be abundant in the field throughout the period under observation and the population of
4. Investigations into the failure of the natural control by parasites to check the host population revealed the presence of eight different species of hyperparasites attacking the pupæ of
5. There is a wide field for research in this direction which will attract some of the younger and energetic entomologists of our country.
Volume 46 Issue 6 December 1957 pp 376-390
Volume 48 Issue 1 July 1958 pp 1-13
This work discusses the views of various authors as to whether
The fairly detailed studies made during the course of the present investigations in regard to the antennæ, the external male genitalia and the experiments conducted to find if the two forms successfully mated to give rise to a progeny consisting of both males and females, have been made. The inequality in the number of antennal segments in the individuals has been studied in detail. It is suggested that there is a complex of more than two species and only a thorough cytological study could solve the problem.
Volume 49 Issue 1 January 1959 pp 74-81
2. Freshly laid host eggs are preferred by the parasites for oviposition.
3. Usually only one egg is laid in a host egg by the parasite. In any case only one individual completes development and emerges successfully.
4.The first instar larva differs from those of other Scelionidæ, whose life-cycle has been worked out, in not possessing antennal processes and in having two caudo-ventral horns. Only one caudo-ventral horn was observed in others.
5. A definite second instar larva is present.
6. The third instar larva has a well segmented body, a well developed tracheal system and 8 pairs of functional spiracles.
Volume 49 Issue 2 February 1959 pp 139-147
2. The host selection of the parasite has been studied in detail. The females prefer 4 to 8 days old larvæ for oviposition and the maximum eggs are deposited in 6 days old larvæ.
3. Various factors which stimulate oviposition in parasites in general and particularly in the case of
Volume 49 Issue 4 April 1959 pp 227-238
Volume 51 Issue 2 February 1960 pp 82-88
Volume 51 Issue 6 June 1960 pp 276-279
Volume 51 Issue 6 June 1960 pp 280-287
Volume 54 Issue 5 November 1961 pp 241-250
Temperature has a profound influence on the fecundity, longevity and oviposition days of the parasite.
Maximum fecundity is obtained at 30°C., and lower and higher temperatures greatly reduced the number of eggs laid.
Optimum temperature for the longevity of the female is 25°C., though there is not significant difference between 25 and 30°C. in this respect. However, at 15°C., the longevity is increased to three times, but the fecundity is very much reduced. At 40°C. the longevity is about four times less than that at optimum temperature.
Daylight or darkness do not affect the fecundity.
Humidity and the interaction between relative humidity and temperature has no marked effect on both fecundity and longevity of the female.
Volume 85 Issue 1 January 1977 pp 13-20