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32
Bayesian inference for generalized stochastic popula- tion growth models with application to aphids
"... Summary. In this paper we analyse the effects of various treatments on cotton aphids (Aphis gossypii). The standard analysis of count data on cotton aphids determines parameter val-ues by assuming a deterministic growth model and combines these with the corresponding stochastic model to make predict ..."
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Cited by 2 (0 self)
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Summary. In this paper we analyse the effects of various treatments on cotton aphids (Aphis gossypii). The standard analysis of count data on cotton aphids determines parameter val-ues by assuming a deterministic growth model and combines these with the corresponding stochastic model to make
Stem Nematode Counteracts Plant Resistance of Aphids in Alfalfa, Medicago Sativa
"... Abstract Plants are exploited by a diverse community of insect herbivores and phytopathogens that interact indirectly through plant-mediated interactions. Generally, plants are thought to respond to insects and pathogens through different defensive signaling pathways. As plants are selected for resi ..."
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and greenhouse experiments were conducted to isolate the effect of nematode infection and aphid abundance on each variety. We found that varieties resistant to nematode, regardless of aphid resistance, had the lowest aphid counts, suggesting possible cross-resistance. Aphid abundance, how-ever, increased when
Genome Sequence of the Pea Aphid Acyrthosiphon
, 2010
"... pisum The International Aphid Genomics Consortium"* Aphids are important agricultural pests and also biological models for studies of insect-plant interactions, symbiosis, virus vectoring, and the developmental causes of extreme phenotypic plasticity. Here we present the 464 Mb draft genome ass ..."
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reveals that only a limited number of genes have been acquired from bacteria; thus the reduced gene count of Buchnera does not reflect gene transfer to the host genome. The inventory of metabolic genes in the pea aphid genome suggests that there is extensive metabolite
WINTER PREVALENCE OF OBLIGATE APHID PATHOGEN Pandora neoaphidis MYCOSIS IN THE HOST Myzus persicae POPULATIONS IN SOUTHERN CHINA: MODELING DESCRIPTION AND BIOCONTROL IMPLICATION
"... Pandora neoaphidis overwintering had been investigated by monitoring its prevalence in Myzus persicae populations in open fields. Cabbage plants in field plots were weekly taken after mycosis initiation, to count and examine the living and dead aphids infected by P. neoaphidis. Based on the field da ..."
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Pandora neoaphidis overwintering had been investigated by monitoring its prevalence in Myzus persicae populations in open fields. Cabbage plants in field plots were weekly taken after mycosis initiation, to count and examine the living and dead aphids infected by P. neoaphidis. Based on the field
A METHOD OF REPARAMETERIZATION FOR APHID POPULATION GROWTH MODEL
"... This study discusses the reparameterization method for tackling the issues of high correlation among the estimated parameters and nonlinear behavior of parameters. The concept of reparameterization only for offensive parameters by different ways of reparameterization, viz., expected-value parameters ..."
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-value parameters and simulation studies is highlighted to derive an explicit form of the aphid population growth model. The proposed model is illustrated with aphid population count data.
PREDATORS AND PARASITOIDS ON DIFFERENT CEREAL APHID SPECIES
"... Rhopalosiphum padi and Metopolophium dirhodum, repectively, regardless of the presence or absence of other aphids. Half of the artificially infected plants were caged whereas the other half was left no caged. One month after artificial aphid infection plants were sampled weekly, and insects were cou ..."
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Rhopalosiphum padi and Metopolophium dirhodum, repectively, regardless of the presence or absence of other aphids. Half of the artificially infected plants were caged whereas the other half was left no caged. One month after artificial aphid infection plants were sampled weekly, and insects were
Red–blue plots for detecting clusters in count data
- Ecology Letters
, 1999
"... BIOSKETCH: Joe Perry has worked at Rothamsted Experimental Station for 22 years, firstly in the Department of Statistics, then in Entomology & Nematology. His research interests cross these disciplines; he is particularly interested in spatial pattern and population modelling. 2ABSTRACT A new in ..."
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Cited by 27 (2 self)
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index and four new graphical displays, termed ‘red-blue ’ plots, are presented to study and measure clustering in spatially-referenced count data. The index can detect clusters in the form of patches, comprising several nearby large counts, and in the form of gaps, comprising several nearby small counts
Response of Insect Relative Growth Rate to Temperature and Host-Plant Phenology: Estimation and Validation from Field Data
, 2014
"... Between 1975 to 2011, aphid Relative Growth Rates (RGR) were modelled as a function of mean outdoor temperature and host plant phenology. The model was applied to the grain aphid Sitobion avenae using data on aphid counts in winter wheat at two different climate regions in France (oceanic climate, R ..."
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Between 1975 to 2011, aphid Relative Growth Rates (RGR) were modelled as a function of mean outdoor temperature and host plant phenology. The model was applied to the grain aphid Sitobion avenae using data on aphid counts in winter wheat at two different climate regions in France (oceanic climate
Simulate rain about action insecticide flonicamid in the control of the cotton aphid
"... ABSTRACT. The cotton production system in Brazil concentrates on the area of the cerrado, characterized by frequent rains that interfere in the effectiveness of the necessary sprays during its cycle. The objective of the work was to evaluate simulate rain of 15 mm in 4 hours after spraying in the co ..."
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spraying, without insecticide spraying with rain, flonicamid spraying with simulate rain of 15 mm after 30 minutes, 1, 2 and 4 hours after spraying. Equivalent insecticide was sprayed 75 g of flonicamid by hectare. The efficiency evaluation was accomplished through the individuals of A. gossypii count
The vertical distribution of mites and aphids on hops in southcentral Washington during the summer of 1993.
"... The distribution of a predatory mite, Galandrolllus occidenta/is, was detennined along with its prey, the twospotted spider mite, Tetranychus urticae, at five elevations on W1Sprayed hops grown on a 5-6 m trellis. The prey species was well established at all elevations when the study began on July 2 ..."
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20, 1993. The predator did not reach the uppennost elevations sampled \ll1til two weeks later. Early in the study whole plant predator:prey ratios were 1:90 or more compared to I:20 in late August. Counts of hop aplUds, Phorodon humuli Schrank, were also made. At lUgh derlSities, hop apl
Results 1 - 10
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32
