[b]Spatial Distribution Pattern of [i]Tetranychus urticae[/i] Koch (Acari: Tetranychidae) on Different Rosa Cultivars in Greenhouse Tehran[/b]
Journal Title: Journal of Ornamental and Horticultural Plants - Year 2015, Vol 5, Issue 3
Abstract
The two-spotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae), is an economically important pest of ornamental plant in Iran. The population abundance and spatial distribution were studied on five Rosa cultivars including Maroussia, Wendela, Elderado, Wenedetta, and Hot Lady during two growing seasons of 2011 and 2012 in greenhouse. The k parameter, index of dispersion, Lloyd’s mean crowding, Morisita’s index and regression methods (Taylor and Iwao) were used to estimate the spatial distribution pattern of mite. There was improved sampling program by k parameter and coefficients of regression models. The result indicated that the highest population density of T. urticae was early of July (2.47 per leaf) and early of September (4.11 per leaf). Also, a sequential sampling plan was developed using the fixed-precision method of Green for estimating the density of the mite. Populations on different Rosa cultivars, especially Maroussia, were aggregated during most of the growing season and negative binomial models fit data sets better than the Poisson series. The mean number of two-spotted spider mite per plant had significantly difference between all plant strata. The fitness percentage of cultivar Maroussia Rosa revealed a slight tendency towards the Poisson distribution, so that 58 and 14.1 percent of data sets from T. urticae on cultivar Wenedetta populations fit the Poisson distribution. These results fully support findings of distribution indices, indicating an aggregated distribution. Determining sampling program and spatial distribution pattern of the pest can effectively help to design and perform of IPM.
Authors and Affiliations
Fatemeh Bidarnamani, Elham Sanatgar, Mehdi Shabanipoor
Keywords
Related Articles
- EP ID EP154105
- DOI -
- Views 76
- Downloads 0
[b]The Role of Preservative Compounds on Number of Bacteria on the End of Stems and Vase Solutions of Cut Gerbera[/b]
This study was conducted to evaluate the effect of preservative solutions on vase life, number of bacteria in the end of stem and in vase solution of cut gerbera 'Double Dutch' and 'Red Explotion'. Cut fl...
Micropropagation of Rosa canina Through Axillary Shoot Proliferation
In vitro propagation of rose has played a very important role in rapid multiplication of species with desirable traits and production of healthy and disease-free plants. Micropropagation using nodal segments of Ros...
[b]The Effects of Different Floral Preservative Solutions on Vase life of Lisianthus Cut Flowers [/b]
Two factorial experiments were conducted to study the interactive effects of four levels of sucrose (0, 20, 40 and 60 g l-1), two levels of citric acid (0 and 160 mg l-1) and two levels of one of the following compounds...
[b]Effect of Foliar Application of Silicon on Physiological Responses of Chrysanthemum ([i]Dendranthema ×grandiflorum[/i]) at Two Different Growth Stages[/b]
To evaluate the physiological responses of chrysanthemum to silicon spray in non-stress conditions, this study was performed in two separate experiments (at 4 to 5 and 8 to 12-leaf stages) as a factorial randomiz...
Growth of Dieffenbachia amoena ‘Tropic Snow’ in Growing Media Containing Sugarcane Bagasse and Sawdust Vermicompost
Vermicompost produced from sugarcane bagasse (SBV) or sawdust (S) were substituted at a range of different concentration in soilless bedding plant container medium, as a peat: vermiculite: perlite (6:3:1), to evalu...