Awuni Ga, Gore J, Cook D, Bond Ja, Musser Fr, Adams Ca
Department of Biochemistry, Molecular Biology, Entomology and Plant Pathology, Mississippi State University Mississippi State, MS, 39762, USA ; Department of Plant and Soil Sciences, Mississippi State University Mississippi State, MS, 39762, USA.
Delta Research and Extension Center (DREC), Mississippi State University 82 Stoneville Road, Stoneville, MS, 38776, USA.
Entomol Exp Appl. 2014 Aug;152(2):127-134. doi: 10.1111/eea.12208. Epub 2014 Jul 5.
The rice stink bug, (Fabricius) (Hemiptera: Pentatomidae: Carpocorini), though graminaceous, discriminates among its numerous host grass species. This could represent a feeding preference, it could be related to host suitability for growth and development. To clarify the role of host grass discrimination, two laboratory studies were conducted: (1) free-choice tests to evaluate preferences of among 11 wild host grass species found in three rice-producing counties of the central Mississippi Delta (MS, USA), and (2) no-choice tests to evaluate the impact of rice ( L.), junglerice [ (L.) Link], and dallisgrass ( Poir.) (all Poaceae), on the development of from second instar to adult. In the free-choice test, four experiments were conducted, each with four sets of host grass species and observed 1, 2, 4, 8, and 16 h after release in cages. Approximately 4 h was necessary for to settle on preferred host grasses. showed a feeding preference for junglerice over all 10 other grass species. Bahiagrass, Flueggé, was the least preferred. The no-choice tests showed significant effect of host grass species on mean development time of nymphal survival to adults. Survival of nymphs was lower and mean development time was longer on dallisgrass compared to rice and junglerice. Knowledge of rate of growth and development on host grasses could be useful in the future development of rice integrated pest management strategies.
稻绿蝽（Nezara viridula (Fabricius)，半翅目：蝽科：红蝽族），尽管以禾本科植物为食，但能区分众多的寄主禾本科植物种类。这可能代表一种取食偏好，也可能与寄主对其生长发育的适宜性有关。为了阐明寄主禾本科植物区分的作用，进行了两项实验室研究：（1）自由选择试验，以评估在美国密西西比三角洲中部三个产稻县（美国密西西比州）发现的11种野生寄主禾本科植物中稻绿蝽的偏好；（2）无选择试验，以评估水稻（Oryza sativa L.）、马唐[Digitaria sanguinalis (L.) Link]和大狗尾草（Setaria faberi Poir.）（均为禾本科）对稻绿蝽从二龄若虫发育到成虫的影响。在自由选择试验中，进行了四项实验，每项实验有四组寄主禾本科植物种类，并在放入笼子后1、2、4、8和16小时进行观察。稻绿蝽大约需要4小时才能在偏好的寄主禾本科植物上定居。与其他10种禾本科植物相比，稻绿蝽对马唐表现出取食偏好。巴哈雀稗（Paspalum notatum Flueggé）是最不受欢迎的。无选择试验表明，寄主禾本科植物种类对稻绿蝽若虫存活到成虫的平均发育时间有显著影响。与水稻和马唐相比，在大狗尾草上若虫的存活率较低，平均发育时间较长。了解稻绿蝽在寄主禾本科植物上的生长发育速率，可能对未来水稻综合害虫管理策略的制定有用。
