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Development of Bio-rational Management Approach Against Mango Hopper, Idioscopus Nagpurensis (pruthi) in Bangladesh

M. S. HOSSAIN
Horticulture Research Centre, Bangladesh Agricultural Research Institute, Gazipur, Bangladesh

M. M. HOSSAIN
Horticulture Research Centre, Bangladesh Agricultural Research Institute, Gazipur, Bangladesh

M. Y. MIAN
IPM Innovation Lab, Bangladesh Site, Gazipur, Bangladesh

S. AKHTER
Regional Sugarcrops Research Station, BSRI, Gazipur, Bangladesh

R. MUNIAPPAN*
IPM Innovation Lab,Virginia Tech, Blacksburg, VA 24961 U.S.A

Abstract/ Executive Summary:

A field experiment was conducted during the 2016-17 mango cropping season in farmers’ fields of Gazipur, Rajshahi and Chapainawabgonj districts of Bangladesh to find an effective bio-rational management option for controlling the mango hopper, Idioscopus nagpurensis (Pruthi) (Hemiptera: Cicadellidae). Randomized Complete Block Design was used incorporating 8 treatments with 3 replications. The treatments were pruning of overcrowded and overlapping branches, spraying of azadirachtin, Beauveria bassiana (Lycomax, Russel IPM), imidacloprid insecticide, installation of yellow sticky grey and blue sticky trap and untreated control. Lowest leafhopper population was recorded in B. bassiana (3.0 hoppers/sweep/tree) followed by imidacloprid (3.7 leafhoppers/sweep/tree) treatments. Highest number of fruit retention was recorded in imidacloprid (40.00 fruits/20 inflorescence/tree) followed B. bassiana (32.67 fruits/20 inflorescence/tree) and azadirachtin (24.00 fruits/20 inflorescence/tree). Imidacloprid treatment offered maximum marginal benefit cost ratio (5.60). Increasing trend of hopper population was recorded in control. Considering health and environment issues, spraying of B. bassiana @ 5.0g/L of water at flower initiation stage, flowering stage and pea stage may be recommended for controlling mango hopper.

Keywords: Azadirachtin, Bio-rational, Beauveria bassiana, Imidacloprid, Mango hopper

Location: In farmers’ fields of Gazipur, Rajshahi and Chapainawabgonj districts of Bangladesh

Start Date: 00-02-2016

End Date: 00-05-2017

Program Area: Pest Management

Commodity: Mango

Objectives:

The present study was undertaken to identify the most effective bio-rational management option(s) against mango leafhoppers.

Methodology:

Study sites Multi-site field studies were conducted in farmers’ fields at three locations, viz., Gazipur, Rajshahi, and Chapainawabgonj districts of Bangladesh. These three sites represent the commercial production areas as well as different climatic zones for mango. Plot layout and data collection Studies were conducted during mango growing season of 2016-2017 following a Randomized Complete Block Design (RCB) incorporating 8 treatments with 3 replications. The treatments were as follows: 1) Pruning of overcrowded and overlapping branches before flowering (in December), 2) Three foliar sprays of azadirachtin (Bio-Neem plus 1EC) @ 1ml/L of water at flower initiation stage, before flower opening stage and pea stage, 3) Three foliar sprays of a talc based powder formulation of Beauveria bassiana (Lycomax, Russel IPM) @ 5.0g/L of water at the flower initiation stage, before flower opening and pea stages, 4) Installation of yellow sticky traps during flower initiation stage from December 2016 to March 2017, 5) Installation of grey sticky traps during flower initiation stage from December 2016 to March 2017, 6) Installation of blue sticky traps during the flower initiation stage from December 2016 to March 2017, 7). Three sprays with imidacloprid (confidor 70WG) insecticide @ 0.2g/L of water at flower initiation stage, flowering stage and pea stage and 8) Control. Each mango tree was considered as one replication. About 10-12 year old mango trees (BARI Aam-4) were used in this trial. Each spray was done by foot pump sprayer to cover the whole mango tree. Mancozeb (indofil M-45) @ 2.0 g/L of water was sprayed after each spray of assigned spray schedule. Twenty inflorescences were selected randomly and tagged in each tree to count fruit retention upto mature stage. The mango hopper population was counted by collecting with sweep net at 7 DAS (Days After Spraying). First, second and third spraying dates were February 07, February 28 and March 20, respectively. Harvestable fruits were collected and sorted into infested and healthy ones and weighed. Then marketable yield was calculated by weighing only ripen uninfested fruit. Costs of treatments and labor were recorded. The monetary returns from the harvests were calculated at the prevailing market price of mango. Number of infested fruit, number of healthy fruit, marketable yield per plant and Marginal Benefit Cost Ratio (MBCR) were calculated for each treatment. Marginal BCR was calculated. Data analysis The data recorded for different parameters were analyzed statistically by using MSTAT-C software for analysis of variance. ANOVA was made by F- variance test and the differences between treatment means were compared by LSD test (Gomez and Gomez, 1984).

Source of Information: Journal of Biological Control, 33(2): 127-131,2019,

Article Link (Online Journal): DOI: 10.18311/jbc/2019/23015

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

From the results, it could be concluded that three sprays of the powder formulation of B. bassiana (Lycomax, Russel IPM) at the flower initiation stage, flowering stage and pea stage resulted in lowest hopper population followed by azadirachtin (Bio-Neem plus 1EC). Spraying of imidacloprid (Confidor 70WG) provided maximum fruit retention and marginal benefit cost ratio. Considering health and environment issues, spraying of B. bassiana @ 5.0g/L of water at flower initiation stage, flowering stage and pea stage may be recommended for controlling mango hopper.

Knowledge Management: Journal