*Corresponding author’s E-Mail:
nurmohalsau@yahoo.com
The study was conducted at
Entomology laboratory of Sher-e-Bangla Agricultural University (SAU),
Dhaka during the period from November, 2013 to May, 2014 to study the
botanical management of mango mealybug. In laboratory, leaf
extraction of neem, korobi (Oleander Nerium), marigold (Tagetes
erecta), nishinda (Vitex negundo), tobacco (Nicotiana tabacum),
tomato (Solanum lycopersicum) and neem (Azadirachta indica) seed
kernel (NSK) extract against 1st, 2nd, 3rd instar nymph and adult
female of mango mealybug were evaluated. After 24, 48, 72, 96 and 120
hours (h) of post treatment NSK extract gave the highest mortality of
5, 10, 15, 13.3 and 10%, respectively. Similar trend of mortality was
also found in spraying botanical extracts. Mortality in dipping
method of 2nd instar mealybug was found 23.33% after 96 h of post
treatment but declined mortality (10%) was found after 120 h of post
treatment. In spraying method highest mortality of 23.33% was found
after 48 h of post treatment. Mortality of 3rd instar nymph was
found lower than 2nd instar nymph and found highest (10%) after 96 h
of post treatment in dipping and 11.67% after 48 h in spraying. 1st
instar and 2nd instar mango mealybug was more vulnerable than 3rd
instar against botanicals. Up to 120 h of treatment the highest
mortality was found in NSK extract followed by neem leaf extract. The
lowest mortality was found in control where no botanicals were
applied.
Key words: Botanical and Mango
mealybug.
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