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Efficacy of Three Botanicals and a Microbial Derivatives Acaricide (abamectin) on the Control of Jute Yellow Mite, Polyphagotarsonemus Latus (bank)

A. Rahman
Department of Entomology, Bangladesh Agricultural University Mymensingh-2202

K. S. Islam
Department of Entomology, Bangladesh Agricultural University Mymensingh-2202

M. Jahan
Bangladesh Jute Research Institue, Bangladesh,

N. Islam
Department of Entomology, Bangladesh Agricultural University Mymensingh-2202

Abstract/ Executive Summary:

Three botanical oils and of microbial derivatives an acaricide (Abamectin) were evaluated for their efficacy in controlling yellow mite Polyphagotarsonemus latus in the field laboratory of Entomology, Bangladesh Agricultural University, Mymensingh. The selected botanical oils viz. Neem oil, Mahogany oil and Karanja oil and the acaricide Ambush 1.8 EC were tested against jute yellow mite on standing jute plants of the experimental plots and assessed for their effect on the basis of population of the pest at 24, 48 and 72 hours after treatment and the reduction of yellow mite infested plant after 7 and 10 days of spraying. The acaricide Ambush 1.8 EC was highly effective showing reduction of 80.25% mite infested plant. Among the botanicals, Neem oil and Mahogany oil showed better efficacy and caused 60.55 % and 55.89 % reduction of mite infestation. Karanja oil was not found promising in controlling yellow mite of jute. Considering the effectiveness against the mite pest as well as the environmental safety, use of Neem and Mahogany oil and also the reduced risk acaricide, Ambush 1.8 EC might be suggested in the IPM of yellow mite.

Keywords: Yellow mite, Efficacy, Botanical oils, Chemical acaricide, Jute, Neem, Mahogany, Karanja, IPM

Location: Bangladesh Agricultural University, Mymensingh

Start Date: 00-03-2013

End Date: 00-08-2013

Program Area: Pest Management

Commodity: Extract (plant, seed)

Objectives:

The experiments were undertaken to evaluate the efficacy of the three botanicals along with an acaricide.

Methodology:

The efficacy of Neem, Mahogany and Karanja oil and a acaricide (Ambush 1.8 EC) were evaluated against jute yellow mite P. latus in the field laboratory of the Department of Entomology, Bangladesh Agricultural University, Mymensingh. during the period from March to August, 2013. Jute plants of tossa (Corchorus olitorius L.) OM-1a susceptible variety sown on 15 March. It was grown as BJRI recommended cultivation procedure. Fifteen plots were selected. Each plot was 4 m2 in size. After natural population (infestations) build up in the field, at the plant age of 28 days the plots were treated with the treatments and control plots were left untreated. Young 3rd leaves from the tip were collected at 60, 90 and 120 days after sowing (DAS), because yellow mites are commonly found on the lower surfaces of young apical leaves and flowers, where they deposit their eggs. The number of mite of different stages (egg, larva, pupa, female and male) per cm² leaf (20 leaves/plot) was counted under a stereomicroscope. All botanicals and Ambush with 1% concentration were applied to the jute plant infested with yellow mite. The experiment was conducted in a Randomized Complete Block Design (RCBD) and was replicated 3 times. The spraying of botanical oils and acaricide was made with the help of a hand-operated sprayer. Care was taken to avoid spray drift on adjacent plants. The spraying was done in such a way that the spray droplet did not coalesce and drain down in the soils and whole plant was thoroughly covered by spray material. After spraying each botanical oil with designed dose the sprayer was washed and cleaned properly. Before, each application, the sprayer was calibrated in order to use the right dose on the plants without wastage of botanical oils by determining the quantity of water required for each plant. The control plants were sprayed only with water.
Five jute plants were selected randomly from each plot. For recording data of different parameters, yellow mite population was recorded at 24, 48 and 72 hours after spraying. Plant height was recorded after 60, 90 and 120 days after planting (DAP). Total number of leaves per five plants, total number of infested leaves, number of curled or deformed leaves per plant and number of dropped leaves per plant were recorded. Number of mite population /leaf after 24, 48, and 72 hours of spraying, number of mite infested plants / plot after 7 and 10 days of spraying, per cent reduction / plant, number of curled or deformed leaves / plant due to infestation and number of dropped leaves / plant due to infestation were recorded. Analysis of variance was done with the help of computer package Minitab and means were separated by using Tukeys pair wise test.

Source of Information: J. Bangladesh Agril. Univ. 14(1): 1–6, 2016

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The present research finding it can be concluded that the maximum damage of jute by yellow mite occurred in untreated plot and the lowest in the acaricide treated plot. Among the botanicals neem oil and mahogany oil were found to be best for controlling jute yellow mite. Karanja oil was not as promising in controlling this pest. It is unlikely that any single method of pest control tactics can achieve an acceptable level of control of yellow mite. Therefore, an integrated approach should be developed in combination with Abamectin, neem oil and mahagoni oil in controlling yellow mite. It demands further investigation, for using them in IPM package.

Knowledge Management: Journal