印度谷螟对花生仁虫蚀粒率、酸值和含油量的影响

The Change of Insect Damaged Kernels,Acid Value and Oil Content of Peanut Seeds Infested by Plofia Interpunctella(Hübner)

花生是一种重要的油料蛋白资源,在储藏过程中易受害虫的感染与危害,印度谷螟是花生储藏过程中的重要害虫之一,其对花生储藏品质的影响值得关注与研究。在20、25、30℃下测定被虫口密度分别为0、2、6、12头/kg的印度谷螟幼虫感染的花生仁在不同时间的虫蚀粒率、酸值和含油量。花生仁在相同温度下被不同虫口密度的幼虫感染,其虫蚀粒率和酸值显著升高,含油量显著降低。30℃条件下,花生仁被12头/kg的幼虫感染20 d后,虫蚀粒率由0.00%上升至19.67%,酸值由0.57 mg/g升至2.25 mg/g,含油量由48.71%降低至47.31%。在不同环境温度中,花生仁感染相同虫口密度的幼虫,其虫蚀粒率、酸值和含油量变化显著不同。被12头/kg的幼虫感染的花生仁分别放置于20、25、30℃的环境中,感染30 d后,虫蚀粒率分别为14.00%、18.33%、21.33%,酸值分别为0.82、2.17、2.60 mg/g,含油量分别为47.60%、47.09%、47.01%。结果显示,随着害虫感染时间延长、龄期增长、虫口密度增加、温度升高,花生仁虫蚀粒率和酸值显著增加,含油量显著降低。

Peanut is an important oil protein resource,which is susceptible to pest infection and damage during storage.Plodia interpunctella(Hübner)is one of the important pests in peanut storage,and its impact on peanut storage quality is worthy of attention and research.The rate of insect damaged kernels(IDK),acid value and oil content of peanut seeds were investigated when infested by P.interpunctella larvae with density of 0,2,6,12 individuals/kg peanut seeds after different days,at 20,25 and 30℃.When peanut kernels were infested by different P.interpunctella larvae densities at the same temperature,the rate of IDK and acid value significantly increased,and the oil content significantly decreased.At 30℃,when infested by 12 individuals per kg of larvae for 20 days,the rate of IDK of peanut seeds increased from 0.00%to 19.67%,the acid value increased from 0.57 mg/g to 2.25 mg/g,and the oil content decreased from 48.71%to 47.31%.When peanut kernels were infested by the same insect density at different temperatures,the rate of IDK,acid value and oil content changed significantly.When peanut kernels were infested by 12 individuals/kg larvae for 30 days at 20,25 and 30℃respectively,the rate of IDK of the samples were 14.00%,18.33%and 21.33%,respectively,and the acid value was 0.82,2.17 and 2.60 mg/g,the oil contents were 47.60%,47.09%and 47.01%,respectively.The results suggested that the IDK,acid value and oil content significantly increased with the increase of insect infestation time,larvae development,insect density and temperature,while the oil contents significantly decreased.