粮食储藏
糧食儲藏
양식저장
GRAIN STORAGE
2014年
6期
12-19
,共8页
Wathukan Laopongist%George Srzednicki%John Craske
Wathukan Laopongist%George Srzednicki%John Craske
Wathukan Laopongist%George Srzednicki%John Craske
害虫感染%顶空固相微萃取法 (SPME)%昆虫信息素%指示性化合物%灵敏度
害蟲感染%頂空固相微萃取法 (SPME)%昆蟲信息素%指示性化閤物%靈敏度
해충감염%정공고상미췌취법 (SPME)%곤충신식소%지시성화합물%령민도
insect infestation%solid phase microextraction ( SPME)%insect pheromones%indicator com-pounds%sensitivity
研究了一种新的用于检测储藏小麦害虫感染的方法———顶空固相微萃取法(SPME),实验结果表明:利用SPME法所提取的几种常见储粮害虫(谷蠹 Rhyzopertha dominica、赤拟谷盗 Tribolium castaneum、扁谷盗 Cryptolestes ferrugineus与锈赤扁谷盗Cryptolestes pusillus)所释放的挥发性信息素可以作为粮食受害虫感染的检测指标,同时由于它们所释放的信息素量不同(谷蠹最高,其次分别是赤拟谷盗﹑扁谷盗和锈赤扁谷盗),这也直接导致了SPM E法检测灵敏度的不同,实验结果表明:在1 kg的储藏小麦中能够成功地检测出1头赤拟谷盗和1头谷蠹,而扁谷盗和锈赤扁谷盗则需要更多的数量才能够被检测出来。
研究瞭一種新的用于檢測儲藏小麥害蟲感染的方法———頂空固相微萃取法(SPME),實驗結果錶明:利用SPME法所提取的幾種常見儲糧害蟲(穀蠹 Rhyzopertha dominica、赤擬穀盜 Tribolium castaneum、扁穀盜 Cryptolestes ferrugineus與鏽赤扁穀盜Cryptolestes pusillus)所釋放的揮髮性信息素可以作為糧食受害蟲感染的檢測指標,同時由于它們所釋放的信息素量不同(穀蠹最高,其次分彆是赤擬穀盜﹑扁穀盜和鏽赤扁穀盜),這也直接導緻瞭SPM E法檢測靈敏度的不同,實驗結果錶明:在1 kg的儲藏小麥中能夠成功地檢測齣1頭赤擬穀盜和1頭穀蠹,而扁穀盜和鏽赤扁穀盜則需要更多的數量纔能夠被檢測齣來。
연구료일충신적용우검측저장소맥해충감염적방법———정공고상미췌취법(SPME),실험결과표명:이용SPME법소제취적궤충상견저량해충(곡두 Rhyzopertha dominica、적의곡도 Tribolium castaneum、편곡도 Cryptolestes ferrugineus여수적편곡도Cryptolestes pusillus)소석방적휘발성신식소가이작위양식수해충감염적검측지표,동시유우타문소석방적신식소량불동(곡두최고,기차분별시적의곡도﹑편곡도화수적편곡도),저야직접도치료SPM E법검측령민도적불동,실험결과표명:재1 kg적저장소맥중능구성공지검측출1두적의곡도화1두곡두,이편곡도화수적편곡도칙수요경다적수량재능구피검측출래。
In this study ,new method was investigated using solid phase microextraction (SPME) for detection of insect infestation in stored wheat . The results show that volatile pheromones isolated from a number of common stored grain insects ,can be used to indicate infestation . The amounts of pheromone released varied between species . Rhyzopertha dominica ( F .) was the highest volatile pheromone producer among the spe‐cies investigated ,then it was followed by Tribolium castaneum ( Herbst) ,Cryptolestes ferrugineus ( Ste‐phens) and Cryptolestes pusillus ( Schonherr) ,respectively . This resulted in different sensitivity when SPME was used for detection . A single specimen of T . castaneum and R . dominica could be successfully detected in 1 kg of wheat ,whereas more number of C .ferrugineus and C .pusillus beetles were required for detection in the same quantity of grain . Extraction period and temperature affected the sensitivity of the SPME method . Longer exposure time and higher temperature allowed more analytes to be collected . Consequently ,extraction for 4 h at 50 Cap‐peared to be the optimum condition for extracting pheromones produced by the beetles covered by this study . The method was further adjusted to be more practical and this resulted in changing the sensitivity . Detection of a single R . dominica could still be successfully achieved ,even though the time and the temper‐ature w ere reduced ,w hereas for the remaining species ,the minimum number of insects required had to be increased by about 40e60% in order to detect volatile pheromone in headspace . In conclusion , the SPME technique in detection of infestation is still required further development to be applied to the grain indus‐try . Dynamic headspace may help improve the sensitivity of technique .