Cross Mating Studies in Epilachna vigintioctopunctata Fab. (Coleoptera: Coccinellidae) From Three Regions of Bangladesh

2012 ◽  
Author(s):  
Kamrul Islam ◽  
M. Saiful Islam ◽  
Zennat Ferdousi
Keyword(s):  
Epilachna Vigintioctopunctata

scholarly journals Residual effect of two insecticides and neem oil against epilachna beetle, Epilachna vigintioctopunctata (Fab.) on bitter gourd

2012 ◽  
Vol 10 (1) ◽  
pp. 21-25
Author(s):  
M Mala ◽  
M M U Islam ◽  
K S Islam
Keyword(s):  
Laboratory Condition ◽  
Field Condition ◽  
Residual Effect ◽  
Bitter Gourd ◽  
Neem Oil ◽  
Botanical Pesticide ◽  
First Instar ◽  
Field Laboratory ◽  
Epilachna Vigintioctopunctata

Experiments were conducted in the Laboratory and Entomology Field Laboratory to determine the residual effect of two insecticides (viz. Siperin 10EC, Malathion 57EC) and a botanical (Neem oil) against Epilachna beetle, Epilachna vigintioctopunctata (Fab.) during the period from February to May 2009. To evaluate the residual effect of one synthetic and one organophosphors pesticides and one botanical pesticide on the mortality of Epilachna beetle, different concentrations of the insecticides (1.0, 2.0 and 3.0% of Neem oil, 1.0, 1.2 and 1.5% of Malathion and 0.5, 1.0 and 1.5% of Siperin.) was used. The mortality of the beetles was recorded at 4, 5, 6 and 7 days after treatments. After 7 days the highest mortality was found on first instar larvae (70.0 in laboratory condition and 65.0 in field condition) treated by Siperin 10EC (1.5% conc.) and the lowest mortality was found on adults Epilachna beetle (17.5 in laboratory condition and 15.0 in field condition) treated by Neem oil (1.0% conc.) The results indicated that Siperin 10EC has longer residual effect than Malathion 57EC and Neem oil. The effectivity ranked: Siperin > Malathion > Neem oil. DOI: http://dx.doi.org/10.3329/jbau.v10i1.12034 J. Bangladesh Agril. Univ. 10(1): 21–25, 2012  

Bekämpfung von Epilachna vigintioctopunctata (F.) und Spodoptera litura (F.) mit Silikaten

2008 ◽  
Vol 60 (1) ◽  
pp. 23-28 ◽  
Author(s):  
Tanja Mucha-Pelzer ◽  
Nitai Debnath ◽  
Arunava Goswami ◽  
Inga Mewis ◽  
Christian Ulrichs
Keyword(s):  
Spodoptera Litura ◽  
Epilachna Vigintioctopunctata

scholarly journals Control Of Epilachna Vigintioctopuntata Fab. (Coleoptera: Coccinellidae) Using Some Indigenous Plant Extracts

1970 ◽  
Vol 6 ◽  
pp. 75-80 ◽  
Author(s):  
Kamrul Islam ◽  
M Saiful Islam ◽  
Zennat Ferdousi
Keyword(s):  
Ricinus Communis ◽  
Adult Emergence ◽  
Economic Losses ◽  
Calotropis Procera ◽  
Indigenous Plants ◽  
Female Ratio ◽  
Datura Metel ◽  
Important Pest ◽  
Indigenous Plant ◽  
Epilachna Vigintioctopunctata

Epilachna vigintioctopunctata is an important pest that causes considerable economic losses to many crops including egg-plants. The crude aqueous extracts of leaves from three indigenous plants namely Ricinus communis, Calotropis procera and Datura metel were used against this beetle aiming at its control under laboratory conditions. Larvicidal bioassays of the extracts showed the following order of toxicity: R. communis (LC50=18.40%) > C. procera (LC50=23.70%) > D. metel (LC50=29.61%). Subsequent data on some vital life-history traits were promising because the extracts significantly reduced both oviposition and egg-hatch, prolonged larval duration (P<0.001), and inhibited pupae formation and adult emergence (P<0.05). However, female ratio was not significantly affected by the treatments. Relevance of these findings on the control of this phytophagous species has been discussed. DOI: http://dx.doi.org/10.3329/jles.v6i0.9725 JLES 2011 6: 75-80

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