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Sowing Dates: a Major Factor on the Incidence of Major Insect Pests and Yield of Mungbean

M. ALTAF HOSSAIN
Regional Agricultural Research Station, Bangladesh Agricultural Research Institute, Ishurdi-6620, Pabna, Bangladesh

M. Z. H. PRODHAN
Regional Agricultural Research Station, Bangladesh Agricultural Research Institute, Ishurdi-6620, Pabna, Bangladesh

M. A. SARKER
Bangladesh Agricultural Research Institute, Joydebpur, Gazipur-1701, Bangladesh

Abstract/ Executive Summary:

An experiment was conducted at Pulses Research Center, Ishurdi, Pabna, Bangladesh during kharif-I to find out the insect pests attacking mungbean crop sowing at different dates to determine the optimum date(s) of sowing. It is seen that the incidence and population fluctuation of various insect pests was very much dependent on the prevailed climatic conditions of the cropping season. The early (February 14 to March 06) and late sown (mid April to onward) crops received higher pest infestation than mid sown (March 13 to April 10) crops. The highest yield (1548 kg/ha) was obtained from March 27 sowing crop. The second highest yield (1279 kg/ha) was obtained from March 13 sowing which was statistically identical to March 20, April 03 and April 10 sowings crop. Again, the delayed sowings after mid April to onward provide yield of 717 kg/ha to 178 kg/ha which were very poor. Hence, for ensuring higher yield and less insect pest’s infestation, mungbean should be sown within the period of March 13 to April 10 and the best date of sowing should be March 27.

Keywords: Sowing dates, Pest infestation , Yield, Mungbean

Location: Ishurdi, Pabna, Bangladesh

Start Date: 00-00-2008

End Date:

Program Area: Crop-Soil-Water Management

Commodity: Mungbean

Objectives:

To investigate the insect pests attacking mungbean, their severity of damage and its effect on grain yield in relation to variation of sowing dates.

Methodology:

The experiments were conducted at Pulses Research Center, Ishurdi, Pabna, Bangladesh during kharif-I, 2008. Twelve sowing dates at 7 days intervals starting from February 14 to May 01 were considered as different treatments to find out the pest incidence, their damage severity and its effect on grain yield. The experiments were laid out in randomized complete block design with three replications. The treatments were randomly allotted in each block. 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 in rows with the spacing of 30 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 in each sowing. The mungbean plants of different sowing dates were closely examined at regular interval commencing from germination till harvest. Data on the first appearance of major insect pests in the field were recorded. Percentage of leaf area damaged by flea beetle was determined by eye estimation and percentage of aphid infested plants was recorded during pod developing stage of each sowing date. Thrips population (thrips/flower/day) was assessed from 20 opened flowers randomly collected from two rows from each plot avoiding border and central rows. The collected flowers were immediately bagged in a polybag containing ethyl acetate soaked cotton balls to kill the thrips for easy counting of their population. Central four rows were kept undisturbed for recording yield data. At maturity ten randomly selected plants were uprooted from central rows of each plot and brought in the laboratory for measuring stem length. Stems of each plant was dissected for measuring the length of the tunnel. Percentage of stemfly infestation was determined on stem tunneling. For recording percentage of pod borer damage data, all the pods were collected from those 10 randomly selected plants of each plot and examined. The damaged (bored) and total pod numbers were counted and per cent pod damage was determined. The crop of central four rows of each plot comprising 8m² (2m x 4m) area was harvested. The grain yield obtained from each plot was converted for yield per hectare. The experimental data were analyzed by MSTAT-C software. The per cent data were transformed by square root or arc sine transformation for statistical analysis. Mean comparisons for treatment parameters were compared using Duncan’s Multiple Range Test (Steel and Torrie, 1960) at 5% level of significance.

Source of Information: J Agric Rural Dev 7(1&2), 127-133, June 2009 ISSN 1810-1860

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Incidence and population fluctuation of insect pests of mungbean was very much dependent on the prevailing climatic conditions of the cropping season. Both the early and late sown crops received higher insect pest infestation than mid sown crops. Hence, for ensuring higher yield with less insect pest’s infestation, mungbean should be sown within the period of March 13 to April 10 and the best date of sowing would be March 27.

Knowledge Management: Journal