摘要
Latex in some laticiferous plants acts as a natural defense system against certain herbivores. The potential of latex produced by the sweet potato as a defense mechanism against the sweet potato weevil, Cylas formicarius (F.) was investigated. Genetic and environmental differences were found in latex production in a broad cross section of sweet potato germ plasm (96 lines). Most lines produced 2.6-10 mg fresh weight x vine -1 of latex when the 2nd inter node from the apex was severed. Some lines, however, produced more, the highest being 48.3 mg X vine-1. Young vine material produced more latex and had less weevil feeding damage than older more mature portions of the vine. Application of latex to the surface of root cores reduced feeding and oviposition. Addition of latex to a semi-artificial media also significantly reduced the number of feeding punctures. Leaf feeding location (veins) and direction (basipetal), however, were not indicative of a major deterrent role for latex against the sweet potato weevil.
摘要译文
一些乳酸菌植物的乳胶作为对抗某些食草动物的天然防御系统。研究了甘薯产生的胶乳作为对甘薯象甲Cylas formicarius（F。）的防御机制的潜力。在甘薯种质的广泛横截面中（96行），在胶乳生产中发现了遗传和环境差异。大多数生产线2。当从顶点切断第二节间时，6-10毫克鲜重x葡萄-1乳胶。然而，有些生产线更多，最高的是48.3毫克X藤-1。年轻的藤蔓材料产生的乳胶更多，并且比较古老的更成熟的葡萄藤具有更少的象鼻虫饲养损害。乳胶在根核表面的应用减少了饲养和产卵。向半人工介质中添加胶乳也显着减少了喂食穿孔的次数。然而，叶子进食位置（静脉）和方向（basipetal）并不表示乳胶对甘薯象鼻虫的主要威慑作用。
Emma S. Data; Stephen F. Nottingham; Stanley J. Kay. Effect of Sweetpotato Latex on Sweetpotato Weevil (Coleoptera: Curculionidae) Feeding and Oviposition[J]. Journal of Economic Entomology, 1996,89(2): 544–549