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ผลงานตีพิมพ์ในวารสารวิชาการEffects of the botanical insecticide thymol on biology of a braconid, Cotesia plutellae(Kurdjumov), parasitizing the diamondback moth, Plutella xylostella L.ผู้แต่ง: Paraporn Yotavong,  Dr.Boonsatien Boonsoong, Associate Professor , Dr.Wanchai Pluempanupat, Associate Professor , Opender Koul, Dr.Vasakorn Bullangpoti, Professor , วารสาร:  
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 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Insecticidal Activity of Plant Crude-extracts on Diamondback Moth Larvae) ผู้เขียน:นายเนื่องพณิช สินชัยศรี, อาจารย์ , Dumre Roongsook, ดร.ณรงค์ จึงสมานญาติ, รองศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractFortynine ethanol crude extracts from 44 plan species were tested for the indecticidal activity on third instar diamondback moth larvae under laboratory conditions. Three plant extracts (20 mg/ml conc.) showed high insecticidal activity (100% mortality of larvae):Aannona muricata seeds, Annona squamosa seeds and Stemona collinsae roots . |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Toxicity of 4,11-Selinnadien-3-one from Nutsedge (Cyperus rotundus L.) Tuber Extracts to Diamondback Moth Larvae (Plutella xylostella L.), Detoxification Mechanisms and Toxi ผู้เขียน:ดร.สุรพล วิเศษสรรค์, รองศาสตราจารย์, Mantana Milne, John Milne สื่อสิ่งพิมพ์:pdf AbstractTubers of nutgrass (Cyperus rotundus L.) were collected from various locations of Thailand during the summer and rainy seasons. Toxicity against the diamondback moth (Plutella xylostella L.) was observed using different concentrations of the active compound, 4,11-selinnadien-3-one. The toxic effects were also determined on mice (Mus musculus), fish (Poecillia reticulata) and bee larvae (Apis florea). It was found that the active principle of nut grass was higher in summer than that in rainy season by ca. 2 folds. This active principle varied according to geographical vareas with Chanthaburi and Chaing Mai producing the highest amounts of 4,11-selinnadien-3-one (0.13-0.16% ai. yield) compared with the other. The LC50 against 2nd–3rd instar larvae of diamondback moth were 7-12 ppm. Detoxification enzyme activities as well as synergistic effects revealed that monooxygenase, esterases and some degrees of glutathione-S-transferase played a role in detoxification. Furthermore, synergists, PB and TPP, could raise the effectiveness of the active principle up to ca. 2-6 fold. At 2,000 ppm of 4,11-selinnadien-3-one, exposed mice showed no sign of acute dermal, acute oral or eye irritation effects. However, the active principle was toxic to other non target organisms with LC50 of 28.01 ppm and 10.8 ppm to 1-month old guppies and bee larvae, respectively. |