Saleh M M E, Draz K A A, Mansour M A, Hussein M A, Zawrah M F M
Pests and Plant Protection Department, National Research Centre, Elbehooth St., Dokki, Giza, Egypt.
Commun Agric Appl Biol Sci. 2011;76(3):297-305.
Sugar beet, Beta vulgaris L. is a strategic crop of sugar industry in Egypt. It is threatened by several insect pests among most important of them is the beet fly Pegomyia mixta. This work deals with the biological control of this insect using four entomopathogenic nematodes (EPNs). The nematodes included Steinernema carpocapsae S2, Steinernema feltiae, Heterorhabditis bacteriophora (HB1-3) and Heterorhabditis bacteriophora S1. Daily mortality of larvae and pupae of P. mixta were recorded after treatment with serial concentrations (500, 1000, 2000 and 4000 infective juveniles (IJs)/ml) of each of four studied EPNs. In the laboratory all tested nematodes killed the larvae inside their mines in the sugar beet leaves and developed in their bodies in different extends. They also killed the insect pupae in the soil and developed in their bodies. Young larvae were more susceptible than old ones. New pupae were more susceptible than old ones. In the field a single spray of S. feltiae or H. bacteriophora caused 81.3 or 75.9% reduction in the larval population of the in sugar beet leaves.
甜菜，即Beta vulgaris L.，是埃及制糖工业的一种战略性作物。它受到多种害虫的威胁，其中最重要的是甜菜蝇Pegomyia mixta。这项工作涉及使用四种昆虫病原线虫（EPNs）对这种昆虫进行生物防治。这些线虫包括斯氏线虫Steinernema carpocapsae S2、斯氏线虫Steinernema feltiae、嗜菌异小杆线虫Heterorhabditis bacteriophora（HB1-3）和嗜菌异小杆线虫Heterorhabditis bacteriophora S1。在用四种研究的EPNs中的每一种的系列浓度（500、1000、2000和4000感染性幼虫（IJs）/毫升）处理后，记录了混合甜菜蝇幼虫和蛹的每日死亡率。在实验室中，所有测试的线虫都杀死了甜菜叶片虫道内的幼虫，并在它们体内不同程度地发育。它们还杀死了土壤中的昆虫蛹，并在它们体内发育。幼虫越小越易受影响，蛹越新越易受影响。在田间，单次喷洒斯氏线虫或嗜菌异小杆线虫可使甜菜叶片中的幼虫数量减少81.3%或75.9%。
