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Effects of Seed Treatment and Soil Application with Some Insecticides on Stemfly and Pod Borers on Mungbean

M.A. ZAHID
Scientific Officer,
ARS, BARI, Burirhat, Rangpur

M, A. I. SARKER
Scientific Officer,
ARS, BARI, Burirhat, Rangpur

M. M. ISLAM
Scientific Officer
ARS, BARI, Burirhat, Rangpur

M . A. HOSSAIN
Senior Scientific Officer
RARS, BARI, lshurdi, Pabna

M. R. BEGUM
Senior Monitoring Officer
RDRS, Rangpur, Bangladesh

Abstract/ Executive Summary:

For controlling stemfly (Opheoniyia phaseoli) and pod borers ( Helicoverpa armigera & Maruca vitrata of mungbean insecticides Carbofuran, Carbosulfan, and Phenyl Pyrazol were applied as seed treatment and soil application during kharif II season (August to December) in 2004 and 2005 at Burirhat, Rangpnr. In two years, stemfly infested 86.67-93.33 percent rnunghean plants and caused 26.90-27.09 percent stem tunneling in untreated plots. Carbofuran in both seed treatment and soil application had similar effect on stemfly resulting 1.4 to 7.0 and 104 to 4.57 times less damage and stem tunneling, respectively , than the control. Pod borer damage did not differ significantly among the treatments in 2004, but differed in the second year. The yield of mungbean was significantly higher by the soil application of Corbofuran followed by the seed treatment by the same insecticides. But soil application of Carbofuran proved to be economical .

Keywords: Seed treatment, Soil application, Insecticides, Stemfly and Pod borers, Mungbean.

Location: Agricultural Research Station, Burirhat, Rangpur

Start Date: 01-08-2004

End Date: 31-12-2006

Program Area: Pest Management

Commodity: Mungbean

Objectives:

To evaluate the relative efficacy of some insecticides as seed treatment and soil application against these pests.

Methodology:

The experiments were conducted at Agricultural Research Station, Burirhat, Rangpur during the cropping seasons of mungbean from August to December of 2004 - 05 and 2005 - 06. The investigation was made to find out the most effective insecticides in seed treatment and soil application for controlling the stemfy and pod borers of mungbean. Carbofuran 5 (3 (Furadan 5G). Carbosulfan 6G (Marshal 6G) and Phenyl Pyrazol 3G (Regent 3G) @ 2 and 4 % were used in seed treatment and the same insecticides at 0.75 and1 kg a.i. /ha were applied in the soil with untreated control. The experiments were laid out in RCBD with three replicates. The unit plot size was 3m x 2.1 m with an inter-plot distance of Im and inter•block distance of 1.5m. The spacing was 30 cm between rows and 10 cm between plants. For seed treatments, required quantity of insecticides was mixed with ample water to prepare slurry with which seeds were treated (Sinha et al., 1993). The granules for soil application were applied in the soil below the seed furrows at the time of sowing. At harvest, I 0 randomly selected plants from each plot were uprooted and stems were split opened by a scalpel for recording the extent of stem tunneling by stemfly. The lengths of the stem were measured by a scale. From these data, percentage of stemfly infested plants and percentage of stem tunneling were calculated.

Source of Information: Bangladesh J. Agril. Res. 34(2): 303-311, June 2009 ISSN 0258-7122

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

In 2004, the soil application of Cacbofuran @ 0.75 kg and I kg a.i./ha recorded the least plant damage (20%) by stemfly and the seed treatment with 2 and 4 % Carbofuran resulted 40% damage, which was double than in soil treatment. In 2005, seed treatment with Carbosulfan (2%) showed the least damage (13.33%) followed by (33.33 %) with Carbosulfan (4%) and Carbofuran (2%) and (4%), respectively. Highest percentage (86.67 - 93.33 %) of stemfiy infestation was obtained from the untreated control plots in both the years. Bear et al. (1993) reported that Carhofuran and Phorate at 0.75 and 1 kg a.i./ha were the most effective insecticide against Opheomyia phaseoli in peas. The effectiveness of soil application of Carbofuran against stem fly has also been reported by Ambekar et al. (1984) and Ramadoss & Sivaprakasam (1988).

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