Int.J.Curr.Microbiol.App.Sci (2018) 7(9): 2534-2539

International Journal of Current Microbiology and Applied Sciences ISSN: 2319-7706 Volume 7 Number 09 (2018) Journal homepage: http://www.ijcmas.com

Original Research Article https://doi.org/10.20546/ijcmas.2018.709.315

Gender Associated Differences in Developmental Parameters of cephalonica (Stainton) (: )

K.C. Sowjanya*, M. Thippaiah and K. Murali Mohan

Department of Agricultural Entomology, GKVK, Bengaluru, Karnataka, India

*Corresponding author

ABSTRACT

K e yw or ds The developmental biology of Corcyra cephalonica (Stainton) (Lepidoptera: Pyralidae) was studied. Male and female larval developmental period, larval instars, pupal and total Corcyra cephalonica, developmental were recorded. Both male and female larvae passed 7 to 8 instars. Developmental period, Larval instars However, most of them passed 7 instars. Male larvae took an average of 31.3±1.8 days and female larvae completed development in 32.5±3 days. Male completed pupal period in an

Article Info average of 9.3±1.1 days and female pupae took an average of 11.3±0.94 days to complete

Accepted: its development. This study revealed, the longer developmental period of females as 18 August 2018 compare with the males. Females completed total developmental period from egg to adult, Available Online: ranged from 42 to 55 days with an average of 48.9 days. Males took 42 to 51 with an 0 10 September 2018 average 45.3 days for completion of total development at 27±1.6 C and 46 ± 5 per cent. Introduction biology and feeding behavior. One such a stored product pest in Corcyra Rate of growth of the population may vary cephalonica (Stainton) belongs to the order from time to time depending on the various Lepidoptera and family Pyralidae. They have factors, which may also include been no clear reports are documented developmental period taken by individuals. regarding gender associated developmental This could vary from one individual to difference in Corcyra cephalonica. another. This variation in each and every developmental stage could accumulate Materials and Methods between and within the sexes. When there will be a variation in developmental period of male Eggs and female, certainly it affects the respected individual’s activities, especially emergence Corcyra cephalonica eggs were inoculated on of male and female from the population. egg card. The hatched larvae were removed Studies on this type of aspects could be easily from egg card by using camel hair brush. carryout by using the especially with These hatched larvae were used for individual stored product insect pests. Since, most of observation and to record the various these insects are studied well with respects to developmental periods.

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Larval period and number of instars in C. Larvae cephalonica Total larval period ranged from 27 to 39 days The larvae, after hatching, were transferred (27 ± 1.6 0C and 46 ± 5% RH). Males took an individually to plastic vial (24.7 cm3) using average of 31.3±1.8 days and females took in camel hair brush. Sufficient quantity of 32.5±3 days to larval development. sterilized sorghum grains was provided in the Statistically larval developmental period plastic vial to support the larval development. among the male and female differed Larval instars were recorded by counting the significantly at 5 per cent (Table 1). Similar number of head capsules. Head capsules that gender associated difference in the larval were collected from each individual vial and period was noticed by Manjunath (1993), who observations were carried till the larva entered recorded average of 29.97 and 30.92 days of pupation. Collected capsules were transferred larval period for males and females, to vial containing 70 per cent ethyl alcohol. At respectively. However, in contrast to the the end, total number of head capsules from present findings, Ayyar (1934) reported longer each individual larva was recorded. larval developmental period (66 days) on cowpea diet. This variation could be due to Larval period was recorded by counting the differences in the diets used in these different number days taken from egg hatching to studies. pupation. Sex of the individual was determined at the pupal stage by looking into Most of the larvae passed 7 instars and few the slit on eighth abdominal segment of pupae. larvae passed 8 instars (Table 2). The present results are in agreement with study of Pupal period in C. cephalonica Seshagiri Rao (1954), who recorded the 8 instars in some larvae and 6 or 7 instars in Once larvae entered pupation, tough webs was other larvae of C. cephalonica. And his dissected using the micro scissor and pupae opinion regarding number of larval instar was were carefully taken out from web (photo 1). that, larval instars varied with sex, food and Sex of pupae noted based on slit on eighth existing conditions. abdominal segment of pupae (photo 2). The pupae were individual kept and monitored However, in the present study both the male daily, to note emergence. Pupal period and female larvae showed variation, though, was estimated based on the time take from the they were reared under same identical rearing day of pupation till the adult emergence. conditions.

Statistical analysis Pupae

Two sampled T- test was used to compare the The pupal developmental period was gender associated developmental parameters completed in 8-12 days with an average of 9.3 ± 1.1 days. Male completed pupal period in an Results and Discussion average of 9.3±1.1 days and female pupae took an average of 11.3±0.94 days to complete During the study, larval period, number of its development. There was statistical larval instars, pupal period and total number of difference among males and female at 1 per days taken by male and female individuals cent level of significance, which is represented were recorded. in table 2.

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The present study confirms the findings of of male and female were significantly Ayyar (1934), Patel and Patel (2007), Nasrin different at 5% and 1% level of significance (2016), Pruthi and Singh (1950), Atwal (Table 1). (1976), Thomas (1961), Shazali and Smith (1986). However, different pupal These results were comparable with the developmental period in contrast to the current studies of Ayyar (1934), who recorded total findings is reported Patel (2011) with 14 days developmental period of 42 on wheat, 53 days and Bhubaneshwari et al., (2013) upto 16 on rice and 57 days on sorghum. On broken days. maize, 47 to 57 days with an average of 48.6 days of developmental period was recorded by The total developmental period (egg, larval Seshagiri Rao (1954). Results of the other and pupal period) completed in 42 to 55 days workers’ studies (Etman et al., 1988, Bartels, at 27 ± 1.6 oC and 46 ± 5% of RH on sorghum 2002, Chowdary and Senapathi, 2015) also diet. Females completed total development supported the present investigation findings. (egg to adult) ranging from 42 to 55 days with Contrary to this study, many investigators an average of 48.9 days. Males took 42 to 51 observed upto 69 days for completion of total with an average 45.3 days for completion of development (Osman, 1986, Haritha et al., total development. Total developmental period 2000 and Limont et al., 2009).

Table.1 Gender associated differences in larval instars in Corcyra cephalonica

Sex of Number of Number of head Number of larval larvae individual capsule instars 32 (86.5 %) 6 7 Female 5 (13.5 %) 7 8 43 (93.5 %) 6 7 Male 3 (6.5 %) 7 8

Table.2 Gender associated statistical difference in developmental biology of Corcyra cephalonica

Sex Male Female t-Statistic Table value

0.05% 0.01% Number of 46 37 individuals observed Average larval 31 ± 1.8 32.5 ± 3 -2.0* 2.0 2.7 period(days) Average pupal 9.3 ± 1.1 11.3 ± 0.9 -9.0** 2.0 2.6 period(days) Average total 45 ± 2.5 48.8 ± 3.3 -5.3** 2.0 2.7 developmental period(days)

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Photo.1 Corcyra cephalonica pupal webs and dissected web and pupa inside it

Photo.2 Corcyra cephalonica pupae

(Slit on 8th female abdominal segment) (No slit on 8th male abdominal segment)

Gender associated difference in t test by using the software WASP (Web Agri developmental biology Stat Programme).

In this study, the time taken by male and Males completed larval period earlier than female to complete the different females. Males took an average of 31.3±1.8 developmental stages viz., larva, pupa and days to complete larval development and total life cycle was investigated. females completed larval development in 32.5±3 days. Statistically larval Males were completed all the developmental developmental period among the male and period earlier as compare to females. These female differed significantly at 5 per cent developmental periods were statistically It was also observed that number of larval differed, which was analyzed by two sampled instars was not constant among the individuals

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Int.J.Curr.Microbiol.App.Sci (2018) 7(9): 2534-2539 studied. Both male and female larvae passed 7 Total developmental period taken by males and to 8 instars. However, males completed the females were studied for one cycle. This study larval developmental period earlier than revealed the longer developmental period of females. In both the sexes, number of instars females as compare with the males. Females varied from seven to eight. In case of males of completed total development from egg to adult C. cephalonica, 93.5 per cent of the larvae was 42 to 55 with an average of 48.9 days. passed seven instars and only 6.5 per cent of larvae undergone eight instars. Same trend Males took 42 to 51 with an average 45.3 days noticed in females of C. cephalonica, where for completion of total development at 27±1.6 86.5 per cent of the larvae passed seven instars 0C and 46 ± 5 per cent. Total developmental and 13.5 per cent passed eight instars. Details of period of male and female were significantly the findings are presented in table 2. different at 5% and 1% level of significance.

Gender associated difference in pupal period Acknowledgement

Pupal period was noted by recording the time First and foremost, I praise and thank God for taken by individual from the day of pupation to giving me the strength and courage for adult emergence from each individual vial. successfully completing the task. I remain ever Males were taken lesser time to complete the thankful to the teaching and non-teaching staff pupal development as compare to female’s of Department of Agricultural Entomology for pupae. Male completed pupal period in an providing me the necessary assistance during average of 9.3±1.1 days and female pupae took my research work. an average of 11.3±0.94 days to complete its development. There was statistical difference References among males and female at 1 per cent level of significance, which is represented in table 1. Atwal, A.S., 1976. Agricultural pests of India and South East Asia. pp. 392-394. Apart from the pupal period, significant Ayyar, P. N. K., 1934. A destructive pest of difference among male and female pupae was stored products in South India, Corcyra noticed with regard to the pupal size. Female cephalonica Stainton (Pyralidae: pupae were larger in size as compare to male Lepidoptera). Bulletin of Entomological pupae. Average length of male pupa was 0.76 ± Research. 25(2): 155-169. 0.16 cm and the average length of female was Bartels, D., 2002. Corcyra cephalonica 0.85 ± 0.1 cm. Stainton- an overlooked pest? Bulletin. OILB/SROP., 25(3): 33-40. Gender associated differences in total Bhubaneshwari Devi, M., Victoria Devi, N., developmental period in C. cephalonica Rita Devi, S. and Ranabir Singh, P., 2013. Biology ans morphometric of Total developmental period of male and female Corcyra cephalonica. Annals of Plant were recorded in the prevailing laboratory Protection Sciences., 21(1): 87-89. temperature and relative humidity (RH). Total Chaudhuri, N. B., and Senapati, S. K., 2015. developmental period taken by males were less Development and reproductive as compare to females developmental period. performance of rice moth Corcyra The differences in the developmental period cephalonica Stainton (Lepidoptera: were significantly different at 1 per cent level of Pyralidae) in different rearing media. significance. This significance difference was Journal of the Saudi Society of suggested by the WASP, statistical software, in Agricultural Sciences. which two sampled t test was carried.

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Cheng, W. Y. and Hung, T. K., 1990. Larval cereals on the development of Corcyra instars and development of Corcyra cephalonica (Stainton) and its egg cephalonica. Report of the Taiwan sugar parasitoid Trichogramma chilonis (Ishii), Research institute. 128; 23-30. Bangladesh Journal of Agricultural Etman, A. A., El-Sayed Ferial, M. A., Eesa, N. Research., 41(1): 183-194. M. and Moursy, L. E., 1988. Laboratory Osman, N., 1986. Development of the rice studies on development, survival, mating moth, Corcyra cephalonica (St.) on behavior and reproductive capacity of the different grains. Pertanika., 9(2): 155-159. rice moth, Corcyra cephalonica Patel, R. A. and Patel, B. R., 2007. Comparative (Stainton) (Lepidoptera., Galleriidae). biology of rice moth, Corcyra Journal of apllied entomology., 106 (1-5): cephalonica Stainton. Journal of Plant 232–240. Protection and Environment., 4(1): 14-19. Haritha, V., vijayalakshmi, K. and Murthy, M. Prakash, R. A. and Kumar, P. S., 2005. Biology M. H., 2000. Biology of rice moth, of Corcyra cephalonica Stainton in Corcyra cephalonica Stainton on important cereals and millets. Insect groundnut pods and kernels under environment., 11(2): 86-87. controlled condition. Journal of applied Pruthi, H.S. and Singh, M., 1950. Pests of zoological researches., 11(2/3): 135-136. stored grain and their control. Issued by Jagadish, P. S., Nirmala, P., Rashmi, M.A., I.C.A.R., pp.1-88. Jayalaxmi N. H. and Neelu Nangia, 2009. Seshagiri Rao, D., 1954. Notes on rice moth Biology of rice moth, Corcyra Corcyra cephalonica Stainton cephalonica Stainton on foxtail millet, (Lepidoptera: Gellerinae). Indian Journal Karnataka Journal of agricultural of Entomology., 15: 95-144. sciences., 22: 674-675. Shailaja, S, 2008. Biology and infestation Limonta, L., Locatelli, D. P., Broglia, T. and behavior of rice meal moth, Corcyra Baumugartne R, J., 2009. Cohort cephalonica Stainton (Lepidoptera: development models for integrated Pyralidae) on proso millet, Panicum Corcyra cephalonica (Stainton) miliaceum (L.). M. Sc. Thesis, University population management. Boll. Zool. Agr. of Agricultural Sciences, Bangalore. Bachic., 41(3): 215-226. Shazali, M.E.H. and Smith, R.H., 1986. Life Manjunath, T.M., 1993. Qualitative and history studies of internally feeding pests quantitative analysis of techniques of stored sorghum: Sitotroga cerealella leadind to economic mass production of (OI) and Sitophilus oryzae (L.). Journal of Corcyra cephalonica Stainton Stored Products Research., 21: 171-178 (Lepidoptera; Pyralidae). Ph. D. thesis, Thomas, P. M., 1961. Control of rice moth in University of Agricultural Sciences, warehouses. No. CWC/Tech-1A/WH/60- Bangalore. 61. Nasrin, M., Alam, M. Z., Miah, R. U. and Hossains, M. M., 2016. Effect of various

How to cite this article:

Sowjanya, K.C., M. Thippaiah and Murali Mohan, K. 2018. Gender Associated Differences in Developmental Parameters of Corcyra cephalonica (Stainton) (Lepidoptera: Pyralidae). Int.J.Curr.Microbiol.App.Sci. 7(09): 2534-2539. doi: https://doi.org/10.20546/ijcmas.2018.709.315

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