Guangzhou, China
Guangzhou, China

Time filter

Source Type

Zhou Z.,South China Agricultural University | Zhou Z.,Institute of Plant Protection | Chen Z.,Guangdong Company of Tobacco | Xu Z.,South China Agricultural University
Journal of Insect Science | Year: 2010

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 2030 days before tobacco, or alternative control methods should be employed during the seedling stage.


Zhou Z.-S.,South China Agricultural University | Zhou Z.-S.,Chinese Academy of Agricultural Sciences | Xu Z.-F.,South China Agricultural University | Chen Z.-P.,Guangdong Company of Tobacco
Pakistan Journal of Zoology | Year: 2011

The tobacco caterpillar, Spodoptera litura (Fabricius) is a serious agricultural insect pest that is increasingly difficult to control in tobacco fields of Southern China. Trap crop plus biological control management system that assembles Colocasia esculenta trap plants and Spodoptera litura nuclear polyhedral virus (SINPV) is a biologically-based pest management strategy that may effectively manage S. litura. Therefore, studies were conducted to evaluate three management strategies including trap crop plus biological control management system, chemical control and natural control against this pest on tobacco in South China. The results showed that the indices of population trend of 2nd and 3rd generations of S. litura were significantly lower in trap crop plus biological control management system than in natural or chemical control. Additionally, parasitization of S. litura larvae and density of several important predators were higher in trap crop plus biological control management system compared to chemical or natural control Overall, our findings suggest that the combination of trap crop plants plus biological control management system will manage effectively S. litura on tobacco, and we advocate the use of such ecologically-sound management practices to reduce pesticides use in Southern China. Copyright 2011 Zoological Society of Pakistan.


Zhou Z.-S.,South China Agricultural University | Zhou Z.-S.,Chinese Academy of Agricultural Sciences | Chen Z.-P.,Guangdong Company of Tobacco | Xu Z.-F.,South China Agricultural University
Pakistan Journal of Zoology | Year: 2012

Effect of three Spodoptera litura control strategies, viz. use of trap crop plus biological control, chemical control only, and a-control with no intervention, on the environment, diversity and abundance of arthropods were studied in the tobacco field. Choice of S. litura control strategy had a significant effect on the diversity and abundance of arthropods in the tobacco agroecosystems. The results indicated that the abundance and diversity of arthropods increased significantly when tobacco was intercropped with a trap crop particularly Colocasia esculenta. Diversity of arthropods was significantly higher under the trap crop plus biological control strategy than under chemical, or non-control condition. In addition, trap crop plus biological control strategy increased the number of natural enemies in the field, which is possibly a reflection of higher levels of food availability (higher arthropod abundance) in these fields. Thus, the stability of arthropod community was better under trap crop plus biological control strategy than under chemical or non-control strategy. Based on the results of our study, the trap crop plus biological control strategy may give an efficient and sustainable control of tobacco pests in the field. © 2012 Zoological Society of Pakistan.


Zhou Z.,South China Agricultural University | Zhou Z.,Chinese Academy of Agricultural Sciences | Chen Z.,Guangdong Company of Tobacco | Xu Z.,South China Agricultural University
African Journal of Agricultural Research | Year: 2010

Because it was previously shown that nocturnal moth larval behavior is influenced by both circadian rhythms and climatic variables, we pursued to investigate the relations between air temperatures and mating behavior of Spodoptera litura adults. Nighttime recordings of adult movement showed a complex interaction between timing and temperature. We found maximum number of mating adults at 3:00 when the average nighttime temperatures were more than 14°C. However, when the average nighttime temperatures were less than 14°C in the tobacco field, peaks adult movement happened before 3: 00. Altogether, these results suggest that the behaviors of S. litura adults are partly regulated by air temperatures during nighttime in the field, and this could be used to improve biological control methods against the S. litura. © 2010 Academic Journals.

Loading Guangdong Company of Tobacco collaborators
Loading Guangdong Company of Tobacco collaborators