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Outbreak of Paracoccus Marginatus in Bangladesh and Its Control Strategies in the Fields

MAM Khan
Department of Entomology, Faculty of Agriculture, Bangladesh Agricultural University, Mymensingh -2202, Bangladesh

MJH Biswas
Department of Entomology, Faculty of Agriculture, Bangladesh Agricultural University, Mymensingh -2202, Bangladesh

KS Ahmed
Department of Entomology, Faculty of Agriculture, Bangladesh Agricultural University, Mymensingh -2202, Bangladesh

S Sheheli
Department of Agricultural Extension Education, Faculty of Agriculture, Bangladesh Agricultural University Mymensingh - 2202, Bangladesh.

Abstract/ Executive Summary:

A field survey as well as market survey on Papaya mealybug, Paracoccus marginatus (Williams and Granara de Willink) was conducted in different regions of Bangladesh to know the infestation level, economic loss, and common management practices used by farmers to control this insect. Field survey revealed that more than one third of the papaya plants were affected by papaya mealybug and papaya growers faced a great economic loss. Severe infestation of papaya mealybug was also found in the nurseries of the survey areas. Market survey indicated that the retailers faced difficulties to sell infested papaya fruit. Seven plants other than papaya were recorded to which papaya mealybug also attacked. The plants were Hog plum (Sponolia spinnata), Chili (Capsicum frutescence), Okra (Abelmoscus esculentus), Brinjal (Solanum melongena), Guava (Psidium melongena), Velvet- apple (Diospyros blancoi) and Hibiscus (Hibiscus rosa - scinensis). The farmers of the survey area used several chemical insecticides indiscriminately against the papaya mealybug and did not get satisfactory control. Some indigenous pest management tactics were also used against papaya mealybug including the use of wood ash and bark extract of mahogany tree.

Keywords: Papaya mealybug, Infestation, Alternate host, Economic loss, Management strategies

Location: Barisal, Jessore and Mymensingh

Start Date: 00-03-2014

End Date: 00-05-2014

Program Area: Pest Management

Commodity: Insects

Objectives:

To know the level of infestation and economic loss caused by papaya mealybug as well as find out the management strategies practiced by farmers for controlling this insect in the field.

Methodology:

Field survey was conducted in three important papaya growing regions o f Bangladesh such as Barisal, Jessore and Mymensingh districts during March 2014 to May 2014 with the purpose to explore the information regarding infestation levels and economic loss caused by Papaya mealybug, and the protective measures taken by the farmers to prevent this insect in the fields. A semi - structured interview schedule was used to collect necessary information on papaya mealybug. Five different fields from each region and five plants from each field were selected randomly. Therefore, a total o f 25 plants from each region were carefully observed to collect data on mealybug infestation. Farmer of each papaya field was interviewed about their perception on papaya mealybug, economic loss caused by the pest and the pest management strategies practiced to control this insect. Observation also made to the surrounding crops to identify alternate host. To find out the impact of papaya mealybug infestation on marketing papaya, three markets from each region and a total of nine markets were surveyed. Five retailers from each market were interviewed to determine the marketing problem of the infested papaya. To find out the situation of papaya mealybug infestation in the nursery, five nurseries from each region and a total of fifteen nurseries from Barisal, Jessore and Mymensingh districts were surveyed. Data were collected on the presence of mealybug in the nursery, percent seedling infestation, loss occurred due to attack of mealybug and the control tactics used by nursery owner s. Results were subjected to a one-way analysis of variance. Differences between mean values were tested using Tukey’s- HSD - test at p = 0.05.

Source of Information: Progressive Agriculture 25:17- 22, 2014, ISSN: 1017-8139

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

This study provides useful information about the papaya mealybug infestation in Bangladesh, where more than one third of the papaya plants are affected with this invasive alien species. The papaya mealybug is extending its range to other crops and seven economically important plant species are identified to which papaya mealybug also attacked. Seedling infestation in the nursery may be a great source of expanding papaya mealybug attack in the field. Both the nursery owners and the papaya growers must be careful to sale and collect planting materials from the nursery to prevent the spread of papaya mealybug in the new fields. The chemical insecticides used by farmers do not provide good control of this insect and as a consequence they are facing great economic loss. Further research is needed to find out suitable control options for combating this noxious invasive insect species in the field.

Knowledge Management: Journal