Influence of Selected Host Plants on Gypsy Moth (Lepidoptera: Lymantriidae) Larval Mortality Caused by a Baculovirus

Keating, S. T.; Yendol, William G.

doi:10.1093/ee/16.2.459

Cited by 68 publications

(30 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These patterns did not therefore support the hypothesis that the baculoviruses would be adapted to the plant associated population from which they originated. In contrast to our findings, variation in food plant has been known to alter virus infectivity in other systems (Keating and Yendol 1987;Keating et al 1990;SosaGómez et al 1991;Forschler et al 1992;Hunter and Schultz 1993;Hoover et al 1998). Although yield and time to death tend to be less frequently measured in baculovirus studies than infectivity, especially in the biological control literature, these infection parameters are no less important for the population dynamics of viruses in natural and agricultural environments.…”

Section: Discussioncontrasting

confidence: 99%

Host plant species can influence the fitness of herbivore pathogens: the winter moth and its nucleopolyhedrovirus

et al. 2002

View full text Add to dashboard Cite

Plants can have a significant impact on the fitness and efficacy of natural enemies. These interactions are widespread and suggest that the influences on the population dynamics of insect herbivores cannot be simply divided into "bottom up" and "top down". Several questions remain little studied in this field. Firstly, to what extent can plants affect the interactions between insects and their pathogens? Secondly, what are the effects of variation within natural enemy species on host/enemy/plant interactions? Finally, if plant/pathogen interactions can occur, do pathogens have increased fitness on the locally abundant food plant of their host? This study explored the influence of three host plant species of the polyphagous winter moth, Operophtera brumata, on infections caused by two geographic isolates of the winter moth nucleopolyhedrovirus (NPV) collected from distinct winter moth habitats. Insects were infected on excised leaf tissue of common oak, Quercus robur, Sitka spruce, Picea sitchenis, and heather, Calluna vulgaris. Parameters fundamental to the basic reproductive rate of the pathogen were estimated: these being infectivity, speed of kill and the yield of virus per insect. Leaf nitrogen and phenolic content were measured as indicators of host plant quality for the three plant species: oak had the highest levels of nitrogen and also the highest levels of phenolic compounds. Heather had higher levels of phenolic compounds than Sitka spruce. Host plant did not affect the infectivity of either isolate but insects that ingested virus on oak foliage died sooner and yielded more virus than insects that ingested virus on Sitka spruce or heather. The effect of host plant species on pathogen yield varied between the two isolates of the NPV but not as predicted by our adaptive hypothesis. The interactions between virus and food plant are discussed in relation to host and pathogen population dynamics.

show abstract

Section: Discussioncontrasting

confidence: 99%

Host plant species can influence the fitness of herbivore pathogens: the winter moth and its nucleopolyhedrovirus

et al. 2002

View full text Add to dashboard Cite

show abstract

“…ticular reference to H. armigera appear to be lacking in the past. The present study on H. armigera confirms the observations that have been made by earlier workers but on different species (KUSHNER and HARVEY, 1962;KEATING and YENDOL, 1987;BENZ, 1987). The present study attempts to explore the effect of different plant leaves or food regimes consumed prior to and after NPV treatment.…”

Section: Frass Analysissupporting

confidence: 92%

“…Larval susceptibility to virus or the viral infectivity in the larval system depend mostly on the host plant species ingested with virus. Host plant mediated NPV infectivity in the larval system has been reported earlier by many workers in a number of lepidopteran species (KU~HNER and HARVEY, 1962;KEATING-and YENDOL, 1987;BENZ, 1987); however, such studies are not uniform as only some of the species were extensively studied. Elaborate studies on similar lines with par-…”

Section: Figl Effect Of Dietary Habit Of H Armigera On the Incubatimentioning

confidence: 91%

Relative changes in the virulence and infectivity of the nuclear polyhedrosis virus in relation to the dietary habit of Helicoverpa armigera Hübner (Lep., Noctuidae)

Ramarethinam¹,

Marimuthu²,

Rajagopal³

et al. 1998

J Applied Entomology

View full text Add to dashboard Cite

The implications of the dietary habit of Helicouerpa armigera on the virulence and infectivity of its nuclear polyhedrosis virus were examined in the laboratory by conducting three bioassays involving six different food regimes. Irrespective of the combination of food rations a significantly lower percentage mortality and higher time taken to kill the larvae were observed in cotton-fed and dosed larval groups over the others. Correlation and regression analysis was also found to be significant between biochemical factors and percentage mortality. A negative correlation between percentage mortality and biochemical factors like foliar pH, phenols, tannins and protein binding capacity and positive correlations between percentage mortality and gut passage time were observed.

show abstract

“…The physical mechanism which has been linked to this phenomenon is the increased tannin production by trees when they are attacked by high densities of gypsy moth larvae. The tannin, whilst unpalatable to the larvae confers increased resistance to the virus on the larvae (Keating et al 1988(Keating et al , 1990Keating and Yendol, 1987). Clearly, this has implications for any control which will be activated by observations of gypsy moth densities increasing.…”

Section: Introductionmentioning

confidence: 99%

Optimal Control of Gypsy Moth Populations

2007

View full text Add to dashboard Cite

This study investigates an optimal strategy for the cost effective control of gypsy moth populations. Gypsy moth populations cycle between low sparse numbers to high outbreak levels and it is during the outbreak levels that the moths cause extensive damage to plant foliage which can lead to deforestation. Deforestation can result in significant economic damage to infested areas, and consequently, there have been many efforts to control moth populations. One effective method of control is the use of the biocontrol agent, Gypchek, but its production is costly. We develop a mathematical model which combines population dynamics and optimal control of the moth population to explore strategies by which the total cost of the gypsy moth problem (economic damage and cost of Gypchek) can be minimized.

show abstract

Influence of Selected Host Plants on Gypsy Moth (Lepidoptera: Lymantriidae) Larval Mortality Caused by a Baculovirus

Cited by 68 publications

References 0 publications

Host plant species can influence the fitness of herbivore pathogens: the winter moth and its nucleopolyhedrovirus

Host plant species can influence the fitness of herbivore pathogens: the winter moth and its nucleopolyhedrovirus

Relative changes in the virulence and infectivity of the nuclear polyhedrosis virus in relation to the dietary habit of Helicoverpa armigera Hübner (Lep., Noctuidae)

Optimal Control of Gypsy Moth Populations

Contact Info

Product

Resources

About