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Development of Management Approach Against Flea Beetle (phyllotreta Striolata) of Radish

M. Z. H. Prodhan
OFRD, Bogra

Abstract/ Executive Summary:

A study was conducted at the farmer's field of the MLT site Shibganj, Bogra during 2013-14 to develop a suitable management approach against flea beetle (Phyllotreta strialata) attacking radish. There are seven treatments viz. T₁= Clean cultivation (removal of crop residues and weeds) + Yellow sticky trap, T₂= T₁+ Seed treatment with Gaucho 70 WS @5g/kg seed, T₃= Seed treatment + use of row covers over the bed or row (Covers should be removed after 3-4 weeks), T₄. = Neem oil cake @300 kg/ha , T₅ = T₁ + Two sprays of Chlarpyrifos @ 2mliL of water at 7 days interval starting from initial stage of infestation, T₆ = T, + Two sprays of Carbaryl @ 1.5g/L of water at 7 days interval starting from initial stage of infestation and T₇= Untreated control. The lowest percentage of root damage and highest yield was found in T3 which differed significantly from the rest treatments. Maximum gross margin was also obtained from the treatment T₃followed by T₅ and T_6.

Keywords: Development, Management approach, Flea beetle, Radish

Location: MLT site Shibganj, Bogra

Start Date: 00-00-2013

End Date: 00-00-2014

Program Area: Pest Management

Commodity: Radish

Objectives:

To find out the most effective management approach against the pest

Methodology:

The experiment was conducted in the farmer's field of the ML T site Shibganj, Bogra during rabi 2013-14. There are seven treatments viz. T_I = Clean cultivation (removal of crop residues and weeds) + Yellow sticky trap, T₂ = T₁+ Seed treatment with Gaucho 70 WS @5g/kg seed, T₃ = Seed treatment + use of row covers over the bed or row (Covers should be removed after 3-4 weeks), T₄ = Neem oil cake @300 kg/ha , T_5, = T₁+ Two sprays of Chlorpyrifos @ 2mllL of water at 7 days interval starting from initial stage of infestation, T₆ =T₁ + Two sprays of Carbaryl @ 1.5gIL of water at 7 days interval starting from initial stage of infestation and T₇ = Untreated control. The experiments were laid out in RCB Design with four replications having plot size 3.0 x 4.0 m with an inter plot distance of 0.75 m and inter block distance of 1.0 m. Seeds (variety Roki) were sown on 26th September, 2013. Intercultural operations were done as and when necessary. The crop was harvested on 16th to 20th November, 2013. Data on pest population, intensity of infestation and yield were recorded carefully. In case of pest population, ten randomly selected plants were examined carefully from each plot and no of adult and larvae were recorded. Data collection was performed from the incidence of the pest up to harvest at 7 days interval. At harvest, 10 randomly selected plants from each plot were carefully uprooted to record percentage of infested plant, leaf and root damage. The yield per plot was recorded and converted into yield per hectare. Data were analyzed using MSTAT software and the treatment means were separated by Duncan's Multiple Range Test (DMR T). Economic evaluation of the treatments on the yield of radish was made for each treatment based on the Marginal Benefit Cost Ratio (BCR). Marginal BCR was calculated as follows: Benefit on control Marginal BCR = Cost of treatment Where, Cost of treatment = Prize of insecticide/botanical + labour and spraying cost Procedure of seed treatment: Seeds were treated according to the procedure of Jagadish and Gowda (1994). A sticky soil with high clay content was obtained from tank bed, dried, powdered and sieved to get finer fractions. For treating, 200g of radish seeds with 20g of the fine soil was taken in a plastic container. Then 10 ml of water, 3-4 drops of gum (sticker) and required quantity of Gauchowere added to this and stirred thoroughly. If necessary more water was added drop by drop and stirred well to get slurry. Lid of the container was tightened properly and vigorously shaken for about 30 seconds to get uniform coating of the slurry on the seeds. The seeds were then air dried in shade overnight and sown on next day.

Source of Information: Annual Research Report, Entomology Division, BARI, Gazipur,2013-2014

Article Link (Online Journal):

Funding Source:

1.

Budget:

Total Budget (Tk.) :

Achievement/Findings:

All the treatments significantly reduced adult population per plant compared to control T₁except T₄ . The no of adult per plant ranged 1.00-4.33. The lowest adult population per plant (1.00) was recorded in T₃ which was statistically similar with the rest treatments except control (4.33/plant). The lowest no of larvae/plant was observed in T₃ (0.22/plant) which was statistically similar with T_I (2.0/plant), T₂ (1.66/plant) and T₄ (l.1l1plant). The highest and lowest percentage of infested plant was obtained from the treatment T₇ (46.66%) and T₃ (6.66%), respectively. In case of leaf damage, the lowest damage was observed in T₆ (12.10%) which was statistically similar with T₃ (15.0%) and T₅ (l5.3%). The lowest percentage of root damage was found in T₃ (3.33%) which differed significantly differed from the rest treatments. Treatment T₆ had 7.66% root damage which was statistically similar with T₂(9.33%) and T5 (9.33%) but differed from the rest treatments. The highest root damage was obtained from control (32.33%).

Knowledge Management: Report/Proceedings