Modeling the Incidence of Yellowing Diseases to Whiteflies and Alternative Host

I Putu Sudiarta I Putu Sudiarta,Gusde Ida Bagus Gde Pranatayana,Ali Nurmasyah Ali Nurmasyah

doi:10.22225/seas.5.2.3936.88-95

I Putu Sudiarta I Putu Sudiarta, Gusde Ida Bagus Gde Pranatayana + Show 1 more

Open Access

https://doi.org/10.22225/seas.5.2.3936.88-95

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Abstract

Yellowing diseases is one types of plant diseases which are found in some of the centers of cultivation of yard long bean in Bali. The spread of yellowing diseases caused the presence of vector insects, such as whiteflies and alternative host plants, such as weeds and other crops. This problem is then examined through statistical modeling in order to determine the pattern of the relationship between the incidence of yellowing disease with the populations of whiteflies and the alternative host plants. Collection of data on the yellowing disease incidences, the abundance of whiteflies, and the existence of alternative host plants was done through a direct observation in 100 farmer fields in several centers of cultivation of yard long beans in Bali. Determination of the best mathematical model was performed by linear regression analysis with ordinary least squares method. The results indicated that the best models for the relationship between the incidence of yellowing disease (KPK) with the population of whiteflies (KB) as well as the alternative host plants of yellowing were as follows: KPK = 1,2265 KB0,9872 TIAK1,0936 (R2 = 98,43 %; P-value = 0,000). The incidence of yellowing disease was highly significant positively correlated with the population of whiteflies and yellowing symptomatic alternative host plants. The existence of alternative host plants around the field was very decisive in triggering the emergence of yellow virus disease in the crop.

Highlights

Yard long beans (Vigna unguiculata sub sp. sesquipedalis L.) is a horticultural crop as native to Southeast Asia [15]
Begomovirus that causes yellowing has been reported in many types of plants such as on chilli pepper, tomato and tobacco caused by viral infection Pepper Yellow Leaf Curl Virus(PepYLCV), Tomato Yellow Leaf Curl Virus (TYLCV), and Tobacco Leaf Curl Virus (TLCV) are considered as the major factor causing yield loss, respectively [5], [10]
The yellowing disease is an important disease caused by viruses that decrease yield on yard long beans in Bali

Summary

Introduction

Yard long beans (Vigna unguiculata sub sp. sesquipedalis L.) is a horticultural crop as native to Southeast Asia [15]. Occurrence of yellowing disease on yard long beans is determined by the presence of insect vectors and existence of alternative host plants [17]. The existence of alternative host plants such as weeds and other crops is another factor that can induce the appearance of the viral disease, in addition to insect vectors [2]. Until now, studies that focus on the analysis of the shape or pattern of the relationship between the incidence of viral diseases with insect vector populations and the existence of alternative host plants have never been there. This research needs to be done in order to determine the relationship patterns between the incidence of yellowing disease with a population of whitefly, B. tabaci, and the existence of alternative host plants such as weeds and other crops

Material and Methods

Results and Discussion

Leucas lavandulaefolia

Determining the Best Model on Yellowing Disease

Conclusion