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Issue:ISSN 2095-1353
           CN 11-6020/Q
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Your Position :Home->Past Journals Catalog->2019年56 No.4

Analyses of the nutritional requirements of Tetranychus urticae
Author of the article:HE Yong-Juan** JIA Bing-Hong Lü Jia-Le WANG En-Dong XU Xue-Nong***
Author's Workplace:(Key Laboratory of Integrated Pest Management in Crops, Ministry of Agriculture, Institute of P1ant Protection,
Key Words:Tetranychus urticae; Phaseolus vulgaris; leaves; bean leaf juice; nutrient contents
Abstract:[Objectives]  To clarify the nutritional requirements of Tetranychus urticae during growth and reproduction in order to develop an artificial diet for this species. [Methods]  We compared the main nutritional contents of T. urticae that had either been raised on natural foods, starved for 24 h, or fed on fresh bean leaves, damaged bean leaves or fresh bean leaves and fresh bean leaf juice. [Results]  The protein content of T. urticae that had been starved for 24 h increased significantly (12.06%) whereas their alanine content decreased by 9.82%. There was no significant difference in the sugar and vitamin content of starved and fed individuals. The protein, proline and vitamin B1 content of bean leaves was 49.74%, 42.26%, 23.36% less, respectively, in damaged than in fresh bean leaves. There was no significant difference in the leaf sugar content of damaged and undamaged leaves. Eight of 10 essential amino acids were significantly less abundant in leaf juice than in leaves. Of these, lysine decreased the most (38.46%). Seven of 8 non-essential amino acids were also significantly less abundant in leaf juice than in leaves. Of these, cysteine decreased the most (66.67%). Vitamin B1 content was lower than the limit of quantification (0.10 mg/100 g) and was not detected in leaf juice. Vitamins E, B2, B6, B12 and nicotinic acid were 45.00%, 27.78%, 34.30%, 56.79%, 27.43% less abundant, respectively, in leaf juice than in leaves, and K, Mg and Mn concentrations were respectively 12.25%, 15.60%, 27.33% lower in leaf juice than in leaves. [Conclusion]  Protein, alanine, proline and vitamin B1 are the main nutrients obtained by T. urticae from bean leaves. Significant differences among some amino acids, vitamins and trace elements were observed between bean leaves and leaf juice.
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