A general distributed delay time varying life table plant population model: Cotton (Gossypium hirsutum L.) growth and development as an example

Gutiérrez, A. P.; Pizzamiglio, M. A.; Santos, Walter Jorge dos; Tennyson, R.; Villacorta, A.

doi:10.1016/0304-3800(84)90071-1

Cited by 40 publications

(20 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Such explanatory models reference ecological principles and allow a relaxation of the assumption that only field observations are a valid basis for the study and management of agricultural systems [85]. The cotton PBDM predicts prospectively the daily time-varying age-mass structured growth dynamic of leaves, stems, and roots, and the number-mass age structured dynamics of fruit and yield formation [89] (see Additional file 1). The cotton model has been used in field studies in Arizona, California, Brazil, China, Egypt, and Sudan [31,34,47,89] reproducing the rich biology of growth, development, and yield.…”

Section: Methodsmentioning

confidence: 99%

“…Physiologically based demographic models (PBDM) of cotton and PBW (see [30,52,89]) are used to explain the underlying effects of weather and planting density on yield and PBW dynamics at the local, state, and national levels under irrigated and rainfed conditions prior to the introduction of insecticides and Bt cotton. Such explanatory models reference ecological principles and allow a relaxation of the assumption that only field observations are a valid basis for the study and management of agricultural systems [85].…”

Section: Methodsmentioning

confidence: 99%

“…Variations of this technology would also be applicable to rainfed cotton in central and south India where rainfall is low and variable and in areas of south India where a portion of the PBW population does not enter diapause [88]. Furthermore, physiologically based demographic models (see "Methods") as used here could provide a rapid way of evaluating short-season cotton varieties and control strategies for cotton pests in the different regions of India and elsewhere (e.g., [89]). …”

Section: Does Bt Cotton Have a Role In Indian Cotton?mentioning

confidence: 99%

See 2 more Smart Citations

Deconstructing Indian cotton: weather, yields, and suicides

et al. 2015

View full text Add to dashboard Cite

Background: Cotton with coevolving pests has been grown in India more than 5000 years. Hybrid cotton was introduced in the 1970s with increases in fertilizer and in insecticide use against pink bollworm that caused outbreaks of bollworm. Hybrid Bt cotton, introduced in 2002 to control bollworm and other lepidopteran pests, is grown on more than 90 % of the cotton area. Despite initial declines, year 2013 insecticide use is at 2000 levels, yields plateaued nationally, and farmer suicides increased in some areas. Biological modeling of the pre-1970s cotton/pink bollworm system was used to examine the need for Bt cotton, conditions for its economic viability, and linkage to farmer suicides. Results: Yields in rainfed cotton depend on timing, distribution, and quantity of monsoon rains. Pink bollworm causes damage in irrigated cotton, but not in rainfed cotton unless infested from irrigated fields. Use of Bt cotton seed and insecticide in rainfed cotton is questionable. Conclusions: Bt cotton may be economic in irrigated cotton, whereas costs of Bt seed and insecticide increase the risk of farmer bankruptcy in low-yield rainfed cotton. Inability to use saved seed and inadequate agronomic information trap cotton farmers on biotechnology and insecticide treadmills. Annual suicide rates in rainfed areas are inversely related to farm size and yield, and directly related to increases in Bt cotton adoption (i.e., costs). High-density short-season cottons could increase yields and reduce input costs in irrigated and rainfed cotton. Policy makers need holistic analysis before new technologies are implemented in agricultural development.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Does Bt Cotton Have a Role In Indian Cotton?mentioning

confidence: 99%

See 1 more Smart Citation

Deconstructing Indian cotton: weather, yields, and suicides

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Until recently, plant and animal demographers have viewed population processes from quite different perspectives, but this gap has narrowed (Gutierrez and Wang 1976;Wang et al 1977;Gutierrez, Pizzamiglio et al 1984;Law 1983). For example, plant ecologists (Harper and White 1974;Harper 1979) proposed that populations of plants consisted of individual plants, each of which had populations of plant subunits with age structure.…”

Section: The Canadian Entomologist February 1987mentioning

confidence: 99%

“…Examples of the application of this model to plant and insect demography and interactions are works by and Gutierrez, Pizzamiglio et al (1984). Bellows (1982) applied a distributed delay model which incorporated hazard rates to examine the dynamics of a laboratory population.…”

Section: Review Of Mathematical Modelsmentioning

confidence: 99%

Energy Acquisition and Allocation in Plants and Insects: A Hypothesis for the Possible Role of Hormones in Insect Feeding Patterns

et al. 1987

Self Cite

View full text Add to dashboard Cite

Can. Ent. 119: 109-129 (1987) A distributed delay age structure model is presented for plants and insects that describes the dynamics of per capita energy (dry matter) acquisition and allocation patterns, and the within-organism subunit (e.g. leaves, fruit, ova) number dynamics that occur during growth, reproduction, and development. Four species of plants (common bean, cassava, cotton, and tomato) and two species of insects (pea aphid and a ladybird beetle) are modeled. A common acquisition (i.e. functional response) submodel is used to estimate the daily photosynthetic rates in plants and consumption rates in pea aphid and the ladybird beetle. The focus of this work is to capture the essence of the common attributes between trophic levels across this wide range of taxa. The models are compared with field or laboratory data. A hypothesis is proposed for the observed patterns of reproduction in pea aphid and in a ladybird beetle. RCsumeOn a construit un modele dkmographique avec distribution de dklai applicable ? I des plantes et des insectes. Le modele dkcrit la dynarnique de l'appropriation et de la rkpartition de I'knergie (matiere seche) per capita, et la dynamique des nombres des sous-unites inm-organisme (ex. feuilles, fruits, oeufs). On a ainsi modklist quatre sortes de plantes {Eve, cassava, coton et tomate) et deux espkes d'insectes (puceron du pois et coccinelle). On utilise un sous-modcle comrnun d'acquisition (rdsponse fonctionnelle) pour estimer les vitesses journali&res de photosynthkse des plantes et d'alimentation du puceron et de la coccinelle. Le but de ce travail est d'extraire les caractkristiques essentielles communes aux niveaux trophiques occup6s par ces divers taxons. Les modkles sont compares avec des donnkes de terrain et de laboratoire. On propose une hypothese pour expliquer les profils obsew6s de reproduction du puceron du pois et de la coccinelle.

show abstract

Farmer Poverty in India—Drivers and Challenges

Nulkar

2024

The Economics of Sustainable Development

View full text Add to dashboard Cite

A general distributed delay time varying life table plant population model: Cotton (Gossypium hirsutum L.) growth and development as an example

Cited by 40 publications

References 16 publications

Deconstructing Indian cotton: weather, yields, and suicides

Deconstructing Indian cotton: weather, yields, and suicides

Energy Acquisition and Allocation in Plants and Insects: A Hypothesis for the Possible Role of Hormones in Insect Feeding Patterns

Farmer Poverty in India—Drivers and Challenges

Contact Info

Product

Resources

About