Dissertation

one plant from each treatment group was randomly placed inside cages and adult D. saccharaliswere added to cages at the rate of one pair per plant. Care was taken to ensure that egg massesdid not hatch either prior to or during the experimental period. Adults were allowed to ovipositinside cages for another four days, after which plants were removed and new egg massescounted.In 2009, five experiments were conducted, three with ‘M202’ one with ‘Rosemont’ andanother with ‘Cocodrie.’ Replication in these experiments ranged from five to six cages perexperiment, with each cage containing one to two plants of each treatment group per cage. In2010, three additional studies were conducted. Each of these studies consisted of two separateexperiments, run in parallel, and utilized ‘M202’and a second cultivar (‘Cocodrie,’ ‘Reiho’ or‘Rosemont’). The number of replications for each cultivar ranged from three to four cages perexperiment, with each cage containing one plant of each treatment group. Previous experimentscarried out by our laboratory have shown that‘M202’and ‘Rosemont’ exhibit a relatively strongresponse when induced with jasmonic acid (Hamm et al., 2010) or with Spodoptera frugiperdaJ.E. Smith herbivory (Stout et al., 2009). Cultiva ‘Reiho’ has been shown to respond tooviposition by the white backed planthopper (Sogatella furcifera) by producing an ovicidalcompound (Suzuki et al., 1996). ‘Cocodrie’ is a common long grain cultivar planted throughoutLouisiana.Numbers of egg masses per plant were analyzed as a completely randomized blockdesign with cage as a random effect and treatment (control plants and plants previously exposedto ovipositing females) as a fixed effect using a mixed model analysis of variance (SAS, 2007).Means were separated using Tukey‘s adjustment.32