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 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Effects of Mangosteen’s Peels and Rambutan’s Seeds
on Toxicity, Esterase and Glutathione-S-transferase
in Rice Weevil (Sitophilus oryzae L.)) ผู้เขียน: ดร.วสกร บัลลังก์โพธิ์, รองศาสตราจารย์ , ดร.สุรพล วิเศษสรรค์, รองศาสตราจารย์ ,  John Milne, ดร.สมชัย พรบันลือลาภ, รองศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractPeel of Mangosteen (Garcina mangostana L.) and seed of rambutan (Nephilium lappaceum L.)
were attracted by Soxhlet’s extraction using ethanol as a solvent. Both extracts were trialed with adult rice
weevils (Sitophilus oryzae L.) by the impregnated filter paper method for the peel of mangosteen extracts,
weevils showed LC50 at 24 hours at 4.91 ? 1.19%w/v. Seed of rambutan extracts showed LC50 at 6.81
? 1.04%w/v.The addition of synergists, PB, TPP and DEM in the extracts reduced overall LC50 showing
SR of ca. 1.3-1.6 folds. The in vitro enzyme studies in lived rice weevil after be tested in both extract at
12 hours showed mangosteen’s peel extracts inhibited esterase and glutathione-S-transferase (GST)
activities ca. 1.6 time. Rambutan’s seed extracts reduced esterase and GST activities ca. 1.33- 1.63 fold.
The addition of synergists decreased activities of these enzymes more than 50% showing of CF ca. 1.19-
12.17. This result suggested that synergists in the extracts could increase efficiency for the control of rice
weevils. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Effect of Herb on Insect Growth in Brown Jasmine Rice During Storage) ผู้เขียน:Safiah Saah, Supitchaya Chanthachum, นางจิราพร เพชรรัตน์ สื่อสิ่งพิมพ์:pdf AbstractEffects of 3 types of herb Capsicum frutescens, Curcuma longa and Citrus hystrix on insect pest of brown jasmine rice packed in plastic LLDPE bag were investigated. Rice weevil, Sitophilus oryzae (L.) was found during 4 months period. Rice weevil population in the control sample of 137.0?4.08 adult/100g was much higher than the samples treated with Citrus hystrix, Capsicum frutescens and Curcuma longa (56.0?3.27, 3.67?0.82 and 2.0?0.0 adult/100g, respectively). Total viable count (TVC) (6.84 logCFU/g) and yeast & mold (4.02 logCFU/g) of the control sample were more than herbs treated samples ((TVC? 4.31, yeast & mold ? 3.65 logCFU/g). Microbial changes of control sample steadily increased during 4 months while microbial count of herb treated samples decreased after 3 months as well as the change of rice weevil number. Color of brown jasmine rice steadily increased during 4 month storage. |
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