Spatial dynamics of teak defoliator (Hyblaea puera Cramer) - Cochin ...

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Sudheendrakumar, V. V. (1994) Reproductive behaviour of H.puera and the role of pheromones. In: Development of a management strategy for the 100 teak defoliator, Hyblaea puera. (Eds. Nair et al.), KFRI research report 95. 121 pp. Uvarov, B.P. (1961) Quality and quantity in insect populations. Proc. Royal Entomological Society of Canada (C) 25: 52-59. Vaishampayan, S. M. and Bahadur, A. (1983) Seasonal activity of adults of teak defoliator Hyblaea puera and teak skeletonizer Pyrausta machaeralis (Pyralidae: Lepidoptera) monitored by light trap catch. In: Insect interrelations in forest and agro ecosystems (Eds. Sen-Sarma, P. K, Kulshrestha, S. K., Sangal, S. K.) Jugal Kishore & Co. Dehra Dun 137- 146. Vaishampayan, S. M., Verma, R. and Bhowmick, A. K. (1987) Possible migration of teak defoliator, Hyblaea puera Cramer (Lepidoptera, Hybaeidae) in relation to the movement of the south-west monsoon as indicated by light trap catches. Indian Journal of Agricultural Science 57(1): 41-46. Zacharias, V. J. and Mohandas, K. (1990) Bird predators of the teak defoliator Hyblaea puera. Indian Journal ofForestry 13(2):122-127.
APPENDIX A ALGORITHM: FOR COMPUTATION OF AUTOCORRELAnON INDICES The general notation used in spatial autocorrelation formulas and their interpretation is as follows: n - the total number ofcells in a layer: N rows x N columns ij - any two adjacent cells Zi - the value ofattribute ofthe cell i cij - the similarity of i's and j's attributes: (zi-zi wij - the similarity of i's and j's locations, Wij = 1 if cells i and j are directly adjacent and 0 other wise 2 - the sample variance: (z, - zml / (n - 1) where Zm is the mean cell value for o the grid In the terms ofthe above notation, spatial autocorrelation is a measure ofthe attribute similarities in the set of cij with the locational similarities of the set of Wij. and then summing the results into a single index. The formula for calculating the Geary index is: c = W C ij I( 2 (w )( U ij where. w=4*n ij The formula for calculating the Moran index is where, LLWij:::::4*n z - Z m ) 2 ) I( n - 1)) i \01
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SPATIAL DYNAMICS OF TEAK DEFOLIATOR
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CERTIFICATE This is to certify that
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Mr. Rajan James, Mr. A. Moosa, Mr.
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4.3.5. Correlation between outbreak
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CHAPTER I INTRODUCTION Insects are
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covering the entire plantations of
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Burma and recommended that providin
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In a two-year light trap study at J
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during 1983-94 and 1987-89 recorded
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area of 50 ha. A group of ten grids
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CHAPTER IV STUDIES ON THE SPATIAL D
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within these various spatially refe
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4.2.3. Correlation between outbreak
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4.3. 2. Outbreak pattern, 1993 The
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4.3.3. Outbreak pattern, 1994 Table
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_ 0 _ 1 0 2 _ 3 _ 4 _ 5
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_ 0 _ 1 0 1 _ 3
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Table 4.7. The relationship between
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Fig. 8. Location of first outbreak
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Table 4.9. Elevation and aspect oft
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aspect and outbreak frequency. The
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map. The methodology adopted for da
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The sixth outbreak occurred on 26 M
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explained as caused by progenies of
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Fig.5.3. Map ofNilambur teak planta
Page 57 and 58: Fig.5.5. Map ofNilambur teak planta
Page 59 and 60: Fig.5.7. Map ofNilambur teak planta
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Page 67 and 68: Fig.5 .15. Map ofNilambur teak plan
Page 71 and 72: Fig.5.l9. Map ofNilambur teak plant
Page 73 and 74: Fig.5 .21. Map ofNilambur teak plan
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Page 78 and 79: 6.2. METHODS In this study, post em
Page 80 and 81: was observed at around 06.15 h on t
Page 82 and 83: Two moths (one male and one female)
Page 84 and 85: Aggregations of the moths were pred
Page 86 and 87: CHAPTER VII DEVELOPMENT OF OUTBREAK
Page 88 and 89: -.-.-._ --- _--. Black light tube -
Page 91 and 92: Table 7.1. Correspondence between l
Page 93 and 94: foliage. If folds are detected, obs
Page 95 and 96: study has considerable bearing on t
Page 97 and 98: maximum of 13 ha (see Section 5.2,
Page 99 and 100: c) Variation in plant quality I ava
Page 102 and 103: away places. These populations seld
Page 104 and 105: Berryman, A. A. (1987) The theory a
Page 106: Nair, K. S. S., Mohanadas, K and Su
Page 112 and 113: Date *No. of Incidence Local Date *
Page 115: Date "No. of Incidence local Date "
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