Potential of trap crops for integrated management of the tropical armyworm, Spodoptera litura in tobacco
1Department of Entomology, College of Nature Resources and Environment, South China Agricultural University,
Guangzhou, 510642, The People’s Republic of China
2State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese
Academy of Agricultural Sciences, Center for Management of Invasive Alien Species, Ministry of Agriculture, P. R.
China, Beijing 100193, The People’s Republic of China
3Guangdong Company of Tobacco, Guangzhou, 510030, The People’s Republic of China
Abstract
The tropical armyworm, Spodoptera litura (F.) (Lepidoptera: Noctuidae), is an important pest of tobacco, Nicotiana tabacum L. (Solanales: Solanaceae), in South China that is becoming increasingly resistant to pesticides. Six potential trap crops were evaluated to control S. litura on tobacco. Castor bean, Ricinus communis L. (Malpighiales: Euphorbiaceae), and taro, Colocasia esculenta (L.) Schott (Alismatales: Araceae), hosted significantly more S. litura than peanut, Arachis hypogaea L. (Fabales: Fabaceae), sweet potato, Ipomoea batata Lam. (Solanales: Convolvulaceae) or tobacoo in a greenhouse trial, and tobacco field plots with taro rows hosted significantly fewer S. litura than those with rows of other trap crops or without trap crops, provided the taro was in a fast-growing stage. When these crops were grown along with eggplant, Solanum melongena L. (Solanales: Solanaceae), and soybean, Glycines max L. (Fabales: Fabaceae), in separate plots in a randomized matrix, tobacco plots hosted more S. litura than the other crop plots early in the season, but late in the season, taro plots hosted significantly more S. litura than tobacco, soybean, sweet potato, peanut or eggplant plots. In addition, higher rates of S. litura parasitism by Microplitis prodeniae Rao and Chandry (Hymenoptera: Bracondidae) and Campoletis chlorideae Uchida (Ichnumonidae) were observed in taro plots compared to other crop plots. Although taro was an effective trap crop for managing S. litura on tobacco, it did not attract S. litura in the seedling stage, indicating that taro should either be planted 20–30 days before tobacco, or alternative control methods should be employed during the seedling stage.
Keywords: Colocasia esculenta, cultural control, trap crop, oviposition preference, attraction
Correspondence: azhongshizhou@yahoo.com, bchenzp@gd.tobacco.gov.cn c*xuzaifu@scau.edu.cn, *Corresponding author
Received: 11 January 2009 |
Copyright: This is an open access paper. We use the Creative Commons Attribution 3.0 license that permits unrestricted use, provided that the paper is properly attributed.
ISSN: 1536-2442 | Volume 10, Number 117
Zhou Z, Chen Z, Xu Z. 2010. Potential of trap crops for integrated management of the tropical armyworm, Spodoptera litura in tobacco. Journal of Insect Science 10:117, available online: insectscience.org/10.117
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