Biological characteristic and control measure of Orthaga exvinacea Hamp. damaging leaf of Cinnamomum camphora Linnaeus in Gia Binh district, Bac Ninh province
Keywords:
Damage, morphology, life cycle and Cinnamomum camphoraAbstract
In 2016, in Gia Binh district, Bac Ninh province, a leaf eating species appeared on the 2 - year - old trees; this insect species, Orthaga exvinacea Hamp. (Pyralidae, Lepidoptera), has four stages (maturity, egg, larva and pupa). The body of mature is brownish gray, the female body length reaches 1.22cm (±0.06) on average; setaceous antenna; average body length of males is 1.13cm (±0.03); antenna has plumose shape; the eggs are yellowish blue; whole body of the larva is brownish and the size of young larva varies with age; puppies are dark brown. Camphor leaf eating insects were reared in laboratory at average temperature of 28.9oC and humidity (RH) of 78.5%. The average life
expectancy is 53.5 days. Selection of the drug Ofatox 400EC for prevention of Camphor leaf eating insects reached the highest effect of 99.8% after 8 hours post spraying.
References
1. Beria, N. N.; Acharya, M. F. and Kapadia, M. N., 2008. Biology of Mangoleaf webber, (Orthaga euvinacea Hamps.) Ann. Pl., 16(1): pp. 203 - 267.
2. Cherian, M. C. and Ananthanarayanan, K. P., 1943. Biology andbionomics of Orthaga exvinacea Hamps., the mango shoot borer. Madras agric.J. 31: pp. 321 - 323.
3. Desai, H. R.; Jhala, R. C.; Rai, A. B., 1999. Biology of Orthagaexvinacea Meyrick (Pyralidae: Lepidoptera) infesting mangoin South Gujarat. J. Applied Zoological Res. Applied ZoologistsResearch Association. 10: 2, pp. 111 - 113.
4. Kannan, M. and Vennugopala Rao, N., 2006. Ecological studies on mango leaf webber (Orthaga exvinaceae Hamp.) in Andhra Pradesh as a basic for IPM, Internat. J.agric. Sci. Vol.2 No.2. pp. 308 - 311.
5. Mahajan, V. and Vermal, S., 1996. Screening of mango varietiesagainst shoot web worm, Orthaga exvinacea Ham (Pyralidae) J.Appl. Zool. Res.,7: pp. 45 - 56.
6. Rawat, R. R. and Saxena, D. K., 1969. Biology and control of Orthagaexvinacea H. (Lepidoptera: Pyralidae) with a first record of itstwo natural enemies. Madras Agric. J.,56: pp. 427 - 429.
7. Reddy, C. H. P.; Prasad, P. R. and Umamaheswari, T., 2002. Biology of mango leaf webber, Orthaga exvinacea Hampson (Pyralidae:Lepidoptera). J. Applied Zoological Res., Applied ZoologistsResearch Association, 13: 1, pp. 25 - 27.
8. Srivastava, R. P., 1997. Mango Insect Pest Management. International Book Distribution Company, Lucknow, pp. 237 - 243
