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Foliar Application of Commercially Available Micro and Macro-nutrients for the Management of Flower Thrips and Pod Borers of Mungbean (2019--2020)

MD. ALTAF HOSSAIN
Pulses Research Centre, RARS, BARI, Ishurdi, Pabna

Abstract/ Executive Summary:

The effect of foliar application of micro and macro-nutrients on flower thrips and pod borers of mungbean was studied at Pulses Research Centre, Ishurdi, Pabna, Bangladesh during Kharif-I, 2020. Flower and pod borer infestation was reduced significantly by the application of micro and macro-nutrients in mungbean. Flower infestation reduction over control ranged from 5.45 to 14.55% and pod infestation reduction ranged from 12.85 to 40.02%. The highest percentage of flower infestation reduction (14.55%) was found in Thiovit sprayed plots followed by Nutra-phos and the highest percentage of pod borer infestation reduction (40.02%) was found in Muriate of Potash sprayed plots followed by Thiovit. The yield increase over control ranged from 2.58 to 13.22%. The highest yield was obtained from McChili+Solubor sprayed plots but the highest benefit comes from Thiovit. This might be due to the lower cost of Thiovit uplift the profit margin and showed a higher MBCR than that of McChili+Solubor sprayed treatment. So, it is seen that foliar application of Thiovit or McChili+ Solubor would be a profitable option for managing flower thrips and pod borers of mungbean with higher yield compared to untreated ones.

Keywords: Thrips, Pod borers, Mungbean, Marginal benefit-cost, Micronutrient

Location: Pulses Research Centre, Ishurdi, Pabna,

Start Date: 00-00-2019

End Date: 00-00-2020

Program Area: Pest Management

Commodity: Borer, Mungbean, Micronutrient

Objectives:

The aim of the study has been taken to evaluate the influence of the application of macro and micronutrients on flower thrips and pod borers of mungbean.

Methodology:

The experiment was conducted at Pulses Research Centre, Ishurdi, Pabna, Bangladesh during Kharif-I, 2020. The application of micro and macro-nutrients on different growth stage of mungbean considered as treatments of the experiment which were: T₁ = Microvit 80 WP (Zn, B & Mn) @ 1 g/l, T₂ = Thiovit 80 WG (S 80%) @ 2 g/l, T₃ = Nutra-phos-24 (P₂O₅ 24%, Ca 20%, S 6% & Zn 12%) @ 3 g/l, T₄ = McChili (Zn 10%) @ 0.35 g/l + Solubor (B 20%) @ 1 g/l, T₅= Muriate of potash @ 10 g/l T₆ = Untreated control. The experiment was laid out in randomized complete block design with three replications. The treatments were randomly allotted in each block. The seeds of BARI Mung-6 were sown on March 24, 2020, in rows with a spacing of 30 cm. The unit plot size was 4m x 3m. During final land preparation, urea, triple superphosphate, muriate of potash, and boric acid were applied in the plots @ 40-90-40-7.5 kg/ha as basal dose. Post sowing flood irrigation was done to provide sufficient soil moisture for seed germination to get optimum plant population in all the treatments. The populations of the plant were maintained constant by keeping plant to plant distance of 7 cm. Foliar application of micro and macro-nutrients were done 4 times, first at starting vegetative growth (3 trifoliate leaved stages), second at full vegetative (5 trifoliate leaved stages), 3^rd at 100% flowering stage, and 4^th at 100% podding stage of the crop. The flower infestation and flower thrips population data were collected twice, at 100% flowering and 100% podding stage. Thrips population was assessed from 20 opened flowers randomly collected from two rows of each side of the plot avoiding border and central four rows. The collected flowers were immediately opened on the white paper board and counted the adult and immature thrips present in the flowers were. Central four rows were kept undisturbed for recording yield data.

At maturity, all the pods were collected from 10 randomly selected plants from the central four rows of each plot and examined. The infested (bored) and total numbers of pods were counted and the percent pod infestation was determined. The pods of central four rows of each plot were harvested. The pods were then threshed; grains were cleaned and dried in the bright sunshine. The grain yield was obtained from the central four rows of each plot was converted into per hectare. The experimental data were analyzed by Statistics 10 software. The percent infestation data were transformed by square root for statistical analysis. Mean comparisons for treatment parameters were compared using the LSD All-Pairwise Comparisons Test at a 5% level of significance. The marginal benefit-cost ratio (MBCR) was calculated on the basis of prevailing market prices of mungbean and the cost of micro and macro-nutrients and their spraying. The marginal benefit-cost ratio was calculated

Source of Information: Annual Research Report 2019--2020, Pulses Research Centre, RARS, BARI, Ishurdi, Pabna

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The foliar application of micro and macro-nutrients reduced flower infestation, thrips population, pod damage, and enhanced return in mungbean. Flower infestation reduction over control ranged from 5.45 to 14.55% and pod infestation reduction ranged from 12.85 to 40.02%. The highest percentage of flower infestation reduction (14.55%) was found in Thiovit sprayed plots followed by Nutra-phos and the highest percentage of pod borer infestation reduction (40.02%) was found in Muriate of Potash sprayed plots followed by Thiovit. The yield increase over control ranged from 2.58 to 13.22%. The highest yield was obtained from McChili+Solubor sprayed plots but the highest benefit comes from Thiovit. This might be due to the lower cost of Thiovit uplift the profit margin and showed a higher MBCR than that of McChili+Solubor sprayed treatment. Foliar application of Thiovit or McChili+ Solubor would be a profitable option for managing flower thrips and pod borers of mungbean with higher yield compared to untreated ones.

Knowledge Management: Report/Proceedings