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Comparison of Ipm Package for Major Insect Pests of Mungbean from World Vegetable Centre with Current Recommended Practice (2018--2019)

MD. ALTAF HOSSAIN

MD. MAHBUBUR RAHMAN

MOHAMMAD HOSSAIN

Abstract/ Executive Summary:

Effectiveness of integrated management approaches using a blue sticky trap, pheromone trap, bio and synthetic insecticides were evaluated against major insects like flower thrips and pod borers of mungbean at Pulses Research Centre, Ishurdi, Pabna, Bangladesh during Kharif-1, 2019. All of the management packages significantly reduced flower infestation, thrips population and pod borer infestation in mungbean. The highest percentage of reduction of flower infestation (80.40%) and thrips population (81.88%) was found in IPM package 3 i.e. installing blue sticky trap + two spraying of chlorfenapyr (Intrepid 10 EC) @ 1 ml/l + third spraying with chlorantraniliprole (20%) + thiamethoxam (20%) (Virtako 40 WG) @ 0.15 g/l followed by Recommended practice. Again, the highest percentage of pod borer infestation reduction (72.65%) was observed in IPM package 3 followed by IPM package 1: Installing blue sticky trap & pheromone trap + two sprayings of azadiractin (Biomeem plus 1EC) @ 1 ml/l + third spraying with spinosad (Success 2.5 EC) @ 1.2 ml/l and Recommended practice (Imitaf spraying). The highest yield (1345 kg/ha) was also obtained from IPM package 3 which was statistically similar to all the IPM packages and Recommended practice. Although the IPM package 3 provided the highest yield and return but Recommended practice gave the highest benefit. Considering environment friendliness, the IPM package 1 i.e., installation of blue sticky trap & pheromone trap + two sprayings of azadiractin (Biomeem plus 1EC) @ 1 ml/l + third spraying with spinosad (Success 2.5 EC) @ 1.2 ml/l would be the best package for controlling of major insect pests of mungbean with higher yield in the insects prone areas.

Keywords: Blue sticky trap, Pheromone trap, bio & synthetic insecticides, Mungbean

Location: Pulses Research Centre, Ishurdi, Pabna

Start Date: 00-00-2019

End Date: 00-00-2019

Program Area: Pest Management

Commodity: Insects, Mungbean

Objectives:

Attempts have been made to developing an economic and effective integrated management package using a blue sticky trap, pheromone trap, bio & synthetic insecticides.

Methodology:

The experiment was conducted at Pulses Research Centre, Ishurdi, Pabna, Bangladesh during Kharif-I, 2019. Installing blue sticky trap & pheromone trap and application of bio & synthetic insecticides considered as treatments of the experiment which were: T₁ = IPM Package 1: Installing blue sticky trap & pheromone trap + two spraying of azadiractin (Biomeem plus 1EC) @ 1 ml/l for sucking and leaf feeding pests + third spraying with spinosad (Success 2.5 EC) @ 1.2 ml/l for flower and pod borer insects, T₂ = IPM Package 2: Installing blue sticky trap & pheromone trap + Three sprayings of azadiractin (Biomeem plus 1EC) @ 1 ml/l for sucking, leaf feeding and borer pests, T₃ = IPM package 3: Installing blue sticky trap + Two sprayings of chlorfenapyr (Intrepid 10 EC) @ 1 ml/l for sucking and leaf feeding pests + third spraying with chlorantraniliprole (20%) + thiamethoxam (20%) (Virtako 40 WG) @ 0.15 g/l for flower and pod borer insects, T₄= Recommended practice: Three sprayings of imidachloprid (Imitaf 20 SL) @ 0.5 ml/l of water at vegetative, flowering and podding stage, T₅= Untreated control (water spray only). The experiment was laid out in randomized complete block design with three dispersed replications. The treatments were randomly allotted in each block. The unit plot size was 4.8m 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 28, 2019 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. Urea, triple super phosphate, muriate of potash and boric acid were applied in the 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. Blue sticky trap and sex pheromone traps for Maruca virtata and Helicoverpa armigera were installed (one trap/plot) at the flower bud initiation stage and kept in the field up to harvest. Treatment wise bio & synthetic insecticides were sprayed first at 35 days after sowing when plants were in 100% flowering and the second spray was done at 42 DAS when plants were in peak flowering & podding stage and third spraying was done at 49 DAS when plants were in seed developing stage. The population data of flower thrips were collected before every spray application and after 24 hrs of each spraying. Thrips population was assessed from 20 opened flowers randomly collected from two rows from each 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. Central four rows were kept undisturbed for recording yield data. Numbers of thrips were counted per blue sticky trap and numbers of moths caught in the traps were recorded at 7 days intervals till harvest. 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 comprising 4.8 m² area were harvested. The pods were then threshed; grains were cleaned and dried in the bright sunshine. The grain yield was obtained from each plot was converted into per hectare. The experimental data were analyzed by Statistix 10 software. The percent infestation data were transformed by square root for statistical analysis. Mean comparisons for treatment parameters were compared using 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 cost of blue sticky trap, pheromone traps and insecticidal spraying. The marginal benefit-cost ratio was calculated

Source of Information: Annual Research Report 2018-2019, Pulses Research Centre, RARS, BARI, Ishurdi, Pabna

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The overall results of this experiment it is seen that flower infestation, thrips population and pod borer infestation reduced significantly by the installation of blue sticky trap, pheromone trap and application of bio & synthetic insecticides. Flower infestation and thrips population were reduced 48.48 to 80.40% and 45.07 to 81.88%, respectively and pod borer infestation reduced 36.83 to 72.65% depending on the efficacy of the IPM packages. The highest percentage of reduction of flower infestation and thrips population was found in the IPM package 3: Installing blue sticky trap + two sprayings of chlorfenapyr (Intrepid 10 EC) @ 1 ml/l + third spraying with chlorantraniliprole (20%) + thiamethoxam (20%) (Virtako 40 WG) @ 0.15 g/l followed by recommended practice. The highest reduction of pod borer infestation (72.65%) was observed in IPM package 3 followed by IPM package 1: Installing blue sticky trap & pheromone trap + two spraying of azadiractin (Biomeem plus 1EC) @ 1 ml/l + third spraying with spinosad (Success 2.5 EC) @ 1.2 ml/l, Recommended practice and IPM package 2. The efficacy of IPM package 3 is higher than that recommended practice and the rest of other IPM packages but the yields obtained from all the packages are statistically similar. The highest additional return (20370 Tk/ha) comes from IPM package 3 followed by IPM package 1 but the highest benefit (MBCR 3.84) obtained from Recommended practice (Imitaf spraying). This might be due to the higher cost of IPM components brought down the profit margin and showed a lower MBCR than that of recommended practice (Imitaf spraying @ 0.5 ml/l). Although IPM packages under study are not profitable as Recommended practice (only chemical insecticide spray) but considering environment friendliness “Installation of blue sticky trap & pheromone trap + two sprayings of azadiractin (Biomeem plus 1EC) @ 1 ml/l + third spraying with spinosad (Success 2.5 EC) @ 1.2 ml/l” would be the best package for controlling of major insect pests of mungbean with higher yield in the insects prone cropping areas.

Knowledge Management: Report/Proceedings