Pesticidal and pest repellency activities of a plant derived triterpenoid 2α,3β,21β,23,28-penta hydroxyl 12-oleanene against Tribolium castaneum.
BACKGROUND
Tribolium castaneum (Herbst) is a major pest of stored grain-based products, and cause severe damage to cereal grains throughout the world. The present investigation was aimed to determine the pesticidal and pest repellent activities of 2α,3β,21β,23,28-penta hydroxyl 12-oleanene against T. castaneum. The compound 2α,3β,21β,23,28-penta hydroxyl 12-oleanene is a triterpenoid which was isolated from the roots of Laportea crenulata Gaud. Surface film technique was used for pesticidal screening, whereas, pest repellency property of the triterpenoid was determined by filter paper disc method.


RESULTS
At 24 hours of exposure duration, significant mortality records (80% and 86%) were observed at doses 0.88 and 1.77 mg/cm(2). No significant change in mortality records was observed when duration of exposure was increased up to 48 hours. The triterpenoid showed significant repellency activity at doses 0.47 and 0.94 mg/cm(2).


CONCLUSIONS
These data suggest that the triterpenoid 2α,3β,21β,23,28-penta hydroxyl 12-oleanene possess both pesticidal and pest repellency activities against T. castaneum and can be used in controlling the pest of grain-based products.
Department of Pharmacy, University of Rajshahi, Rajshahi, 6205, Bangladesh. alamkhan792002@yahoo.co.in.
Alam
A
Khan
Department of Animal Husbandry and Veterinary Science, University of Rajshahi, Rajshahi, 6205, Bangladesh. surus06@yahoo.com.
Md Shariful
MS
Islam
Department of Animal Husbandry and Veterinary Science, University of Rajshahi, Rajshahi, 6205, Bangladesh. moizur@gmail.com.
Moizur
M
Rahman
Department of Fisheries, University of Rajshahi, Rajshahi, 6205, Bangladesh. tanjeenazaman@yahoo.com.
Tanjeena
T
Zaman
Department of Pharmacy, University of Rajshahi, Rajshahi, 6205, Bangladesh. ekramulekramul@yahoo.co.in.
Md Ekramul
ME
Haque
D000818:Animals; D007300:Insect Control / Q000379:methods*; D007302:Insect Repellents / Q000494:pharmacology*; D007928:Lethal Dose 50; D009828:Oleanolic Acid / Q000031:analogs & derivatives* / Q000494:pharmacology; D010575:Pesticides / Q000494:pharmacology; D018517:Plant Roots / Q000737:chemistry; D014231:Tribolium / Q000145:classification / Q000187:drug effects*; D027003:Urticaceae / Q000737:chemistry* / Q000145:classification
C523931:2alpha,3beta,21beta,23,28-pentahydroxyl 12-oleanene; D007302:Insect Repellents; D010575:Pesticides; D009828:Oleanolic Acid