Malaysian Applied Biology Journal

  • Increase font size
  • Default font size
  • Decrease font size

28-1&2-04

E-mail Print PDF
Malays. Appl. Biol. (1999) 28(1&2): 19-24

CONVERGENCES IN WITHIN-PLANT DISTRIBUTION OF APHIS GOSSYPII GLOVER (HOMOPTERA: APHIDIDAE) AND ITS PREDATOR MENOCHILUS SEXMACULATUS FABRICIUS (COLEOPTERA: COCCINELLIDAE) ON CHILLI PLANTS

HASSAN, S.T.S.1*, LEE, F.C.1, HUSSEIN, M.Y.2, MAISIN, N.1 and RASHID, M.M.1

1 Dept. of Biology 2Dept. of Plant Protection, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia

ABSTRACT

The level of convergence in within-plant distribution of an aphid, Aphis gossypii Glover, and its coccinellid (ladybird beetle) predator, Menochilus sexmaculatus Fabricius, on chilli plants is assessed spatially and temporally by a relative contrast analysis. Proportion of infestation at each mainstem node (MSN) of the plant is contrasted between the aphid pest and its predator. On each plant the total proportion of infestation of aphid and coccinellid each equals unity (one). Confounding effect of other predators is avoided by analysing plants that carried only aphid and coccinellid. Sampling was conducted twice per week, with a total of 40 entire plants (1 plant as the unit sample) examined per week, for 13 weeks of the MC4 variety chilli crop season. At each MSN a large leaf subsample was selected at random as a subsample. A total of 5200 raw data points and 160 pooled proportional data entries at each MSN were obtained. Such a large data set ensures conformity to the Central Limit Theorem. The differences in proportion between aphid and coccinellid at the MSN were also subjected to an exploratory data analysis to ensure normality of residuals and homogeneity of variances, thus further justifying the ensuing parametric analysis. These differences were then compared using paired t test, with zero difference as the null hypothesis for a perfect convergence. Results obtained indicated a very high level of convergence throughout a plant for the entire chilli crop season. This further vindicates M. sexmaculatus as an effective predator of A. gossypii. The relative contrast technique and the information obtained are useful for planning biocontrol strategy within the context of integrated pest management (IPM).


Key words: Insecta, aphid, coccinellid, distribution, predation.

REFERRENCES

Adisubroto, F.X.W. 1996. Ecological characteristics of aphidophagous Menochilus sexmaculatus Fabricius and its performance against Aphis gossypii Glover. Ph.D. thesis, Universiti Pertanian Malaysia. 199 pp.

Bakar, R.A. 1991. Within-plant and between-plam distribution of insects on chilli, brinjal, ana leucaena plants, in monoculture and poly culture cropping systems. B.Sc. Hons thesis, Universiti Pertanian Malaysia. 266 pp.

Blackman, R.L. and Eastop, V.F. 1984. Aphids on the World Crop: An Identification ana Information Guide. Chicester & Wiley, New York.

Chaston, I. 1971. Mathematics for Ecologists. Butterworths, London. 132 pp.

Gilbert, N. 1973. Biometrical Interpretation. Oxford, London. 125 pp.

Grevstad, F.S. and Klepetka, B.W. 1992. The influence of plant architecture on the foraging efficiencies of a suite of ladybird beetles feeding on aphids. Oecologia, 92: 399-404.

Hassan, S.T.S. 1976. The area of discovery of Apanteles glomeratus (Hymenoptera: Braconidae), Pteromalus puparum (Pteromalidae) and Brachymeria regina (Chalcididae). Entomologia experimentalis et applicata, 20: 199-205.

Hassan, S.T.S., Wilson, L.T. and Blood, P.R.B. 1991. Oviposition by Heliothis armigera and H. punctigera (Lepidoptera: Noctuidae) on okra-leaf and smooth-leaf cotton in Australia. International Journal of Pest Management, 39(2): 239-245.

Hassan, S.T.S., Hussein, M.Y., Bakar, R.A., Rashid, M.M. and Arshad, M.A. 1992. Within-plant distribution of aphids on chilli. Proceedings of Conference on Chilli Pepper production in the Tropics, 13-14 October 1992, Kuala Lumpur, Malaysia, 103-104 pp.

Hassan, S.T.S. and Wilson, L.T. 1993. Simulated larval feeding damage patterns of Heliothis armigera (Hubner) and H. punctigera (Wallengren) (Lepidoptera: Noctuidae) on cotton in Australia. International Journal of Pest Management, 39(2): 239-245.

Hussein, M.Y. and Abdul Samad, N. 1993. Intercropping chilli with maize or brinjal to suppress populations of Aphis gossypii Glov., and transmission of chilli viruses. International Journal of Pest Management, 39(2): 216-222.

Lee, F.C. 1996. Aphis gossypii Glove (Homoptera: Aphididae) and Menochilus sexmaculatus Fabricius (Coleoptera: Coccinellidae) on chilli: within-plant distribution and optimum sampling. B.Sc. Hons. thesis, Universiti Pertanian Malavsia. 152 nn.

Maisin, N. 1996. Reproductive morphology and behaviour of Menochilus sexmaculatus Fabr. (Coleoptera: Coccinellidae). M. Sc. thesis, Universiti Pertanian Malaysia. 171 pp.

Maisin, N., Hassan, S.T.S., Hussein, M.Y. and Sajap, A.S. 1997a. Within-plant distribution of predatos on chilli. Journal of Tropical Agriculture and Food Science, 25(1): 15-23.

Maisin, N., Hassan, S.T.S., Hussein, M.Y. and Sajap, A.S. 1997b. Mating behaviour of Menochilus sexmaculatus Fabr. (Coleoptera: Coccinellidae). Malaysian Applied Biology, 26(2): 57-61.

Owen, F. and Jones, R. 1984. Statistics. Polytech, Stockport, Great Britain. 416 pp.

Pedigo, L. and Buntin, G.D. (Eds). 1994. Handbook of Sampling Methods for Arthropods in Agriculture. CRC Press, Boca Raton, Florida. 714 pp.

Steel, R.G.D. and Torrie, J.H. 1960. Principles and Procedures of Statistics. McGraw Hill, New York. 481.

STSC. 1991. Statgraphics. Statistical Graphics Corporation, U.S.A.

Vehrs, S.L.C., Walker, G.P. and Parrella, M.P. 1992. Comparison of population growth rate and within-plant distribution between Aphis gossypii and Myzus persicae (Homoptera: Aphididae) reared on potted chrysanthemums. Journal of Economic Entomology, 85(3): 799-807.

Wilson, L.T., Sterling, W.L., Rummel, D.R. and Devay, J.E. 1989. Quantitative sampling principles in cotton IPM. In: Integrated Pest management Systems and Cotton Production. R.E. Frisbie, K.M. El-Zik & L.T. Wilson (Eds.). Wiley & Sons, New York. pp. 85-120.
 

Latest MABJ Issue

Vol 48(1) March 2019

Table of content

Latest news!

According to MyCite 2014 report, MABJ ranked 95 out of 142 Malaysian journals in terms of yearly impact factor.