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Eco-friendly Managment of Flower Thrips and Pod Borers of Mungbean Through Sesame Intercropping. Season: 2018-2019

Md. Altaf Hossain
Pulses Research Centre, BARI, Ishurdi, Pubna, Bangladesh

Abstract/ Executive Summary:

Effectiveness of sesame intercropping in mungbean in managing flower thrips and pod borer of mungbean was studied at Pulses Research Centre, Ishurdi, Pabna during kharif-I, 2019. Sesame intercropping in mungbean reduced flower infestation by thrips and pod borer infestation significantly. Among the intercropped treatments, mungbean : sesame at 2:2 row ratio arrangements was found the best in reducing flower thrips and pod borer infestation. Sesame intercropping showed equivalent performance in reducing pod borer infestation as like as insecticide spraying (Imitaf 20 SL @ 0.5 ml/l). Significantly the highest mungbean equivalent yield (1391 kg/ha) was obtained from mungbean sprayed with insecticide and the second highest yield (1259 kg/ha) was recorded from sole cropping of mungbean. Sesame intercropped treatments provided the lower yield compared to the sole cropping of mungbean. This might be due to lower market price of sesame. Considering environment friendliness and to avoid the risk of crop failure, sesame intercropping in mungbean might be eco-friendly management approach against flower thrips and pod borers of mungbean providing higher yield and benefit.

Keywords: Pulses, Lentil, Grain yield, BARI Mung-6, BARI Til-4, Mungbean

Location: Pulses Research Center, Ishurdi, Pabna, Bangladesh

Start Date: 00-00-2018

End Date: 00-00-2019

Program Area: Crop-Soil-Water Management

Commodity: Mungbean, Sesame, Borer

Objectives:

To determine the effect of sesame intercropping in suppressing flower thrips and pod borers damage in mungbean.

Methodology:

The experiment was conducted at Pulses Research Center, Ishurdi, Pabna, Bangladesh during kharif-I 2019. There were six treatments viz., T₁ = Sole cropping of mungbean, T₂ = Mungbean : sesame (2 : 1 row ratio), T₃= Mungbean : sesame (2 : 2 row ratio), T₄ = Mungbean : sesame (3 :1 row ratio), T₅ = Mungbean : sesame (3 :2 row ratio), T₆ = Sole cropping of mungbean with spraying Imitaf 20 SL @ 0.5 ml/l. The experiment was laid out in randomized complete block design with three replications. The treatments were randomly allotted in each block. The unit plot size was 4.8m x 4m with a distance of 1m between the plots and 1.5 m between the replications. The seeds of BARI Mung-6 and BARI Til-4 were sown on March 28 in rows with the spacing of 30 cm in each plot. The unit plot contains 16 rows x 4m. The plant populations of mungbean and sesame were maintained constant by keeping plant to plant distance 7 cm and 5 cm, respectively. Urea, triple super phosphate, muriate of potash and boric acid were applied in both sole and intercropped plots @ 40-90-40-7.5 kg/ha during final land preparation. Post sowing flood irrigation was done to provide sufficient soil moisture for seed germination to get optimum plant population in all the treatments. Imidacloprid (Imitaf 20 SL @ 0.5 ml/l) was sprayed three times - first at 100% flowering (33 DAS), second at 100% podding (40 DAS) and third at seed developing stage (47 DAS) of the crop. The population data for thrips in flowers were collected twice, at one day after both first and second spraying. Thrips population was assessed from 20 opened flowers which were randomly collected from two rows of each side of the sole mungbean plot avoiding border and central rows. In case of sesame intercropped plots, thrips population data were collected from middle rows of the plots in between the sesame intercrops. The collected flowers were immediately opened on the white paper board and counted the adult and immature thrips present in the flowers. At the maturity, pods of 10 randomly selected plants from the middle rows of each plot were collected and examined. The bored (infested) and the total numbers of pods were counted and the per cent pod infestation was calculated. The pods of central four rows of each plot comprising 4.8m²(1.2 x 4m) area were harvested in incase of sole crop. In intercropped treatments, whole plot was harvested. The pods of both mungbean and sesame were then threshed; grains were cleaned and sun dried. The grains obtained from each plot were converted into kg/ha. Mungbean equivalent yield was calculated by taking prevailing market prices of the commodity. The experimental data were analyzed by Statistix 10 software. The per cent infestation data were transformed by square root for statistical analysis. Mean comparisons for treatment parameters were compared using LSD All-Pairwise Comparisons Test at 5% level of significance. Returns (Tk/ha) and benefit cost ratio (BCR) were calculated on the basis of prevailing market prices of mungbean, sesame and other material & non material costs.

Source of Information: Annual Research Report-2018-2019, Entomology Division, Pulses Research Centre, BARI, Ishurdi, Pubna, Bangladesh

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

From the study it is observed that intercropping sesame in mungbean reduced flower thrips and pod borer infestation significantly. Sesame intercropping in mungbean physically and chemically interfere both flower thrips and pod borers to infest mungbean. Due to shedding effect of sesame influenced less pod setting in mungbean and also lower market price of sesame than that of mungbean provided the lower mungbean equivalent yield in sesame intercropped treatments than sole cropping of mungbean. Considering environment friendliness and avoid the risk of crop failure, sesame intercropping in mungbean might be eco-friendly management approach against flower thrips and pod borers of mungbean providing higher yield and benefit.

Knowledge Management: Report/Proceedings