Agriculture Canada Research Station, 107 Science Crescent, S7N 0X2, Saskatoon, Saskatchewan, Canada.
J Chem Ecol. 1991 May;17(5):931-41. doi: 10.1007/BF01395600.
Selected isothiocyanates (mustard oils) were tested as attractants for adultNysius niger Baker, a pest of mustard crops in the Canadian prairies. Individuals of both sexes, but predominantly females, were caught in yellow boll-weevil traps baited with certain mustard oils. Initial testing was done with compounds loaded on rubber septa, a procedure that resulted in a great disparity in release rates between compounds due to differences in volatility. In subsequent experiments, glass tubes of varying dimensions were used so that release rates of each compound could be controlled and maintained at a constant rate. Of mustard oils tested, ethyl 4-isothiocyanatobutyrate, the corresponding methyl ester of which is found in seeds in the cruciferous genusErysimum, was the most attractive. However, the methyl ester itself was either less attractive or not attractive at all. Allyl andn-propyl isothiocyanates were less attractive than ethyl 4-isothiocyanatobutyrate, and 2-phenylethyl isothiocyanate was not attractive. Insects were caught in traps almost exclusively when traps were in proximity to canola and mustard fields in bloom.
选择的异硫氰酸酯（芥末油）被测试为加拿大草原芥菜作物害虫黑腹果蝇的引诱剂。雌雄个体都被某些芥末油引诱的黄铃虫诱捕器捕获，但主要是雌性个体。最初的测试是用涂有橡胶隔片的化合物进行的，由于挥发性的差异，该程序导致化合物之间的释放率存在很大差异。在随后的实验中，使用了不同尺寸的玻璃管，以便可以控制和保持每个化合物的释放率在恒定速率。在所测试的芥末油中，乙基 4-异硫氰酸丁酯最具吸引力，其对应的甲酯存在于十字花科植物芸薹属的种子中。然而，甲酯本身要么吸引力较小，要么根本没有吸引力。丙烯基和正丙基异硫氰酸酯的吸引力小于乙基 4-异硫氰酸丁酯，而 2-苯乙基异硫氰酸酯则没有吸引力。当诱捕器靠近开花的油菜和芥菜田时，昆虫几乎只在诱捕器中被捕。
