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Yield Loss Assessment of Mungbean Due to Stemfly, Ophiomyia Phaseoli (tryon) Attack

Dr. Altaf Hossain
Principal Scientific Officer (PSO)
PRC,BARI,Ishurdi,Pabna

Abstract/ Executive Summary:

A study was carried out at Pulses Research Center, Ishurdi, Pabna during kharif I, 2012 to assess the avoidable loss of mungbean due to stemfly attack. The infestation of stemfly was significantly lower in treated crops compared to untreated ones. Plant growth parameters (plant height, number of branches/plant and number of leaves/plant) reduced due to the infestation of the pest. Yield contributing characters (pods/plant, length/pod, seed/pod and 1000 seed weight) and yield were also influenced significantly by the pest. The avoidable loss was 6.00%.

Keywords: Yield loss,Mungbean , Stemfly

Location: Pulses Research centre Ishurdi, Pabna

Start Date: 31-03-2012

End Date:

Program Area: Pest Management

Commodity: Mungbean

Objectives:

To assess the avoidable loss of mungbean due to stemfly attack.

Methodology:

The experiment was conducted at Pulses Research centre Ishurdi, Pabna during kharif- I, 2012. The experiments were laid out in paired plot design with eight replications. The unit plot size was 3m x 4m with a distance of 100 cm between the plots and 150 cm between the replications. The seeds of BARI mung 6 were sown on March 31, 2012 in rows with the spacing of 30 cm. The populations of the plant were maintained constant by keeping plant to plant distance of 7 cm. NPK fertilizers @ 20-40-20 kg/ha in the form of urea, triple super phosphate and muriate of potash were applied during final land preparation. One set of plots was kept protected from stemfly infestation by application of carbofuran (Furadan 5 G @ 20 kg/ha) in rows during seed sowing and Carbosulfan (Marshal 20 EC @ 2 ml/l) was sprayed three days after germination and continued up to pod formation at weekly interval and the other set was exposed to natural infestation by the pest. Infestation occurs there naturally and no insecticides were used.The stemfly infestation data were collected during first harvest by randomly selected ten plants uprooted from each plot and brought in the laboratory. Roots were cleaned to remove adhering soil; stems of each plant were dissected with a scalpel and observations of length of stem, length of tunnel created by stemfly larvae. The number of stemfly damaged plants in each sample was recorded. Data regarding growth parameters were collected 10 randomly selected uprooted plants from each plot and to record plant height (measured from the root-stem junction to the top of the shoot), number of branches/plant, number of leaf/plant, number of pods/plant, length/pod, seed/pod and 1000 seed weight. The yield per plot was recorded and converted into yield per hectare.

Source of Information: Annual research report of PRC,Ishurdi,Pabna,2011-2012, BARI

Article Link (Online Journal):

Funding Source:

1. ACIAR

Budget: Twenty thousand only

Total Budget (Tk.) : Twenty thousand only

Achievement/Findings:

It was found that Stemfly infestation reduced plant growth like plant height, branches/plant and leaves/plant, yield contributing parameters like pods/plant, length/pod, seeds/pod and 1000 seed wt. and yield. Stemfly infestation varied depending on prevailed weather condition of the cropping season. In this season stemfly infestation was low due to prevailed dry weather condition. So avoidable yield loss was less and it was 6.00%.

Knowledge Management: Report/Proceedings