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Effects of Net Barrier and Synthetic Insecticides on Phytolyma lata
(Homoptera: Psyllidae) Infestation, Growth and Survival of Milicia excelsa
in the Field |
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J.A. Ugwu and A.A. Omoloye |
Abstract:
The effect of net barrier and synthetic insecticides on Phytolyma lata
infestation, growth and survival of Milicia excelsa seedlings was investigated
during the year 2010-2011 in Ibadan Southwest Nigeria. In a complete randomized
design with three replications, a 2 m high netted barrier were laid out in unit
plots of 15x15 m2 using five treatments: Blue net+dimethoate+carbofuran,
Green net+dimethoate+cabofuran, Blue net+dimethoate, Green net+carbofuran and
dimethoate only (control). Plant height, stem diameter, number of branches,
numbers of galls, Pytolyma lata density, plant mortality and survival
of Milicia seedling were recorded at monthly interval for two years.
The treatments showed a significant difference (p<0.05) over the control.
The net barrier plants were free from P. lata infestation 12 months after
planting. The combined treatments of blue net barrier, dimethoate and carbofuran
recorded least number of galls (7.89%) on Milicia seedlings while combined
treatments of green net, dimethoate and carbofuran recorded least population
density of P. lata (13.59%). There was no significant difference (p<0.05)
between the combined treatments of blue and green barrier nets on the plant
growth, although blue net+dimethoate+carbofuran recorded highest plant height
and stem diameter with mean of 122.50 cm and 1.03 mm, respectively. Integrated
treated plots recorded 100% seedling survival while control plot recorded 54%
seedling survival after two years. Integration of net barrier with carbofuran
and dimethoate is economical and should be adopted for successful establishment
of Milicia plantation.
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How to cite this article:
J.A. Ugwu and A.A. Omoloye, 2014. Effects of Net Barrier and Synthetic Insecticides on Phytolyma lata
(Homoptera: Psyllidae) Infestation, Growth and Survival of Milicia excelsa
in the Field. Journal of Entomology, 11: 218-224.
DOI: 10.3923/je.2014.218.224
URL: https://scialert.net/abstract/?doi=je.2014.218.224
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