tailieunhanh - Development of prediction equations for tomato leaf curl virus on tomato at different dates of planting using Logistic and Gompertz model

Tomato leaf curl virus (ToLCV) has become a major threat of Tomato (Solanum lycopersicum) production in the world including tropical and subtropical tomato growing regions due to its the endemic presence. The aim of this study is to develop a forewarning strategy for the farmers. The components included in the experiment were, a susceptible tomato variety “Patharkuchi” planted at 15 days interval starting from16th August to 29th December during both the experimental year 2012-13 and 2013-14 under field condition. Different dates of planting also allowed the plants to interact with the different weather factors prevailed through out the growing period. Here, six independent weather variables like maximum and minimum temperature and their differences, maximum and minimum relative humidity and rainfall were considered and natural epiphytotic conditions were permitted. Disease severity was measured and expressed as AUDPC. Prediction equations were developed for each treatment separately through step down multiple regression analysis which showed that different meteorological factors having different influence on disease severity and these were explained after logistic and gompertz transformation of the realized observed value of the disease severity (expressed as AUDPC). Logitic and gompertz are the two transformation models through which the disease progress curve move over time and its comparative expression are also presented graphically in this study. Different dates of planting showed differences in disease severity. | Development of prediction equations for tomato leaf curl virus on tomato at different dates of planting using Logistic and Gompertz model

• Nông nghiệp
• Area under disease progress curve
• Dates of planting
• Logistic and gompertz model
• Prediction equation
• Tomato leaf curl virus
• Weather parameters
• Spot blotch
• Path analysis
• Disease severity
• Durum wheat (Triticum durum L )
• Bipolaris sorokiniana
• Inoculum concentration
• Winter wheat
• Area under the disease progress curve
• Weather indices
• Discriminant function
• Logistic regression
• Pre harvest forecast models
• Rice using weather parameters
• Correlation and PDI
• Effect of weather parameters on wilt
• Wilt (Fusarium oxysporum f sp gladioli)
• High economic return
• Weather parameters on pest
• Pest of okra
• Parbhani Kranti variety
• Jassid was observed during 21st
• Polyphagotarsonem us latus
• Population dynamics
• Relation to weather parameters
• Sesame broad mite
• Rice blast disease
• Pyricularia oryzae
• Blast disease (Pyricularia oryzae)
• Rabi season rice
• Weather parameters on infestation
• Alternaria blight
• Alternaria brassicae
• Varieties of Brassica juncea
• Weather parameters on severity
• Mulches on growth
• Yield and quality of summer Sesamum
• Summer Sesamum (Sesamum indicum L
• Black gram
• Major insect pests
• Seasonal incidence
• Correlation with weather parameters
• Early blight
• Per cent disease intensity
• Early blight of tomato
• Weather parameters on intensity
• Seasonal fluctuation
• Yellow stem borer
• Yellow stem borer scirpophaga incertulas
• Trap catches with weather parameters
• Dates of sowing
• Powdery mildew (Erysiphe cichoracearum)
• Various sunflower sowing dates
• Relationship between weather parameters
• Chilli (Capsicum annum L )
• Impact of weather parameters
• Incidence of aphids
• Myzus persicae sulzeron chilli
• Influence of weather factors
• Incidence of major pests
• Predators of cotton
• Weather factors on the incidence
• Pest incidence
• Regression analysis
• Influenced by weather on sesame
• Weather on sesame
• Succession and population dynamics
• Mustard and weather
• Mustard aphid
• Different cultivars
• Weather parameter
• Population build up
• Minor insect pests of Brinjal
• Weather parameters on population build
• Fall armyworm
• Weather parameters in maize ecosystem
• Maize ecosystem
• Fall armyworm Spodoptera frugiperda
• Weather factors
• Liriomyza trifolii (Burgess) on tomato
• Serpentine leaf miner
• Influence of weather parameters
• Meteorological parameters
• Climatic variability
• Climatic variability of Parbhani
• Analysis of rainfall
• Weather parameters and correlation
• Progression of cotton leaf curl disease
• Cotton leaf curl disease
• Vector whitefly
• Weather influences
• Vector whitefly’s ecology
• Rice insect pests
• Natural enemies
• Incidence and correlation
• Weather parameters in central
• Major insect pests of rice
• Relative humidity
• Number of rainy days
• Maydis leaf blight
• Bipolaris Maydis
• Nisikado Shoemaker
• Weather parameters on development
• Climate change
• Correlation studies between weather parameters
• Sesamum indicm L
• Varieties yield
• Different Phenophases
• Change in climate
• Sucking pests
• Predators on okra crop
• Population fluctuation of sucking pests
• Okra crop
• Correlation and regression
• Relation to whitefly dynamics
• Mungbean yellow mosaic virus
• Studying its epidemiological factors