Effect of capsicum varieties and mulching on major arthropod pests

ABSTRACT

An experiment was conducted in the experimental field of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during the period from October, 2019 to February, 2020 to analyse the effect of different mulching materials and varieties against major insect pest and growth performance of capsicum (capsicum annum L). The experiment was laid out in Randomized Complete Block Design (2 factor) replicated with three times. For this study, factor A-M0= No Mulching; M1= Black polythene Mulching; M2= Paddy straw; M3= White polythene Mulching and factor B- V1= California wonder; V2= Omax hybrid; V3= BARI Misti Morich-1; V4= BARI Misti Morich-2. Results revealed that effect of different mulching materials and varieties against major insect pest and growth performance of capsicum that significantly effect on most of the yield and yield contributing parameters studied in this experiment. Similarly, most of the traits were also affected significantly due to the combination effect. In case of varietal performance, California wonder (V1) showed the best results in terms of the number of whitefly, number of thrips, number of fruit borer, number of mites, number of aphid, number of leaf, length of leaf, fruit length, fruit breadth, number of fruit, number of infested fruit and total yield. In case of mulching treatments, M1 (Black polythene Mulching) showed outstanding performance for percent reducing the number of insect pests and getting the better growth and higher yield compared to those of other treatments. Again in case of combinations of varieties and different treatments, the number of infestation was reduced in V1M1 and V1M1 showed best results in terms of percentage of infested fruit, fruit infestation at weight basis, fruit length, fruit girth, number of fruit Plant-1 and total yield. There was negative relationship present in number of insect and percentage of fruit infestation in weight basis with the yield of capsicum, i.e. when the number of insect and percentage of fruit infestation in weight basis was increased the yield of capsicum was decreased.

Key words: Capsicum, mulching, arthropod pests

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Response of cotton to different plant spacing along with concentrations of growth regulator (mepiquat chloride) and time of foliar application on leaf area index

ABSTRACT

Plant growth regulators (PGRs) are used in cotton production to optimize yield and quality and even suppressing excess growth whenever necessary. Experiments were conducted in 2017 at Cotton Seed Multiplication, Training and Research Farm, Sreepur, Bangladesh to study the response of cotton yield and quality to different plant spacings, concentration and time of application of mepiquat chloride (MC) growth regulator. Plant spacings like 45 cm × 30 cm, 60 cm × 30 cm and 75 cm × 30 cm; MC spray @ 1.0, 2.0, 3.0 and 4.0 ml  L-1  water at 25, 50 and 75 DAE for each concentration along with water spray as control, were the treatment variables. The maximum LAI (0.80) was obtained from 75 cm × 30 cm spacing and the minimum LAI (0.74) was from 60 cm x 30 cm spacing. LAI was maximum (0.90) for plants grown without MC. Plants grown with application of MC 2 ml L-1 water at 25 DAE produced the minimum (0.64) Leaf area index evaluated highest (1.06) from 2 ml MC L-1 water sprayed at 25 DAE with 60 cm x 30 cm spacing and lowest (0.52) from 2 ml MC L-1 water at 25 DAE with 45 cm × 30 cm spacing treatment combinations. So, cotton cultivation in Sreepur, Gazipur areas may be accelerated with foliar application of mepiquat chloride @ 2 ml L-1 water at 25 DAE along with plant spacing of 60 cm x 30 cm for higher yield and quality.

Key words: Plant spacing, growth regulator, time of foliar, leaf area index, cotton.

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Effect of different plant spacing along with concentrations of growth regulator (mepiquat chloride) and time of foliar application on seeds boll of cotton

ABSTRACT

Plant growth regulators (PGRs) are used in cotton production to optimize yield and quality and even suppressing excess growth whenever necessary. Experiments were conducted PGRs are used in cotton production to optimize yield and quality and even suppressing excess growth whenever necessary. Experiments were conducted in 2017 at Cotton Seed Multiplication, Training and Research Farm, Sreepur, Bangladesh to study the response of cotton yield and quality to different plant spacings, concentration and time of application of mepiquat chloride (MC) growth regulator. The maximum seeds boll-1 (119.61) was recorded at spacing 75 cm × 30 cm and lowest seeds boll-1 (116.92) was marked from spacing 45 × 30 cm. in respect of MC, the highest seeds boll-1 (122) was obtained from foliar sprayed at 3.0 ml L-1 water at 75 DAE and the lowest (109.33) was observed in 1.0 ml MC L-1 water at 25 DAE. Considering combined action, seeds boll-1 was marked highest (122.67) from 3 ml MC L-1 water at 75 DAE with 60 cm × 30 cm spacing and became lowest (106.42) at 1 ml MC L-1 water sprayed at 50 DAE with 45 cm × 30 cm spacing.  So, plant spacing of 60 cm x 30 cm can be practiced for profitable cotton production in Sreepur areas of Bangladesh.

Key words: Plant spacing, growth regulator, time of foliar, seed boll, cotton.

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Effect of different plant spacing along with concentrations of growth regulator (mepiquat chloride) and time of foliar application on seed index of cotton

ABSTRACT

Plant growth regulators (PGRs) are used in cotton production to optimize yield and quality and even suppressing excess growth whenever necessary. Experiments were conducted Plant growth regulators (PGRs) are used in cotton production to optimize yield and quality and even suppressing excess growth whenever necessary. Experiments were conducted in 2017 at Cotton Seed Multiplication, Training and Research Farm, Sreepur, Bangladesh to study the response of cotton yield and quality to different plant spacings, concentration and time of application of mepiquat chloride (MC) growth regulator. Plant spacings like 45 cm × 30 cm, 60 cm × 30 cm and 75 cm × 30 cm; MC spray @ 1.0, 2.0, 3.0 and 4.0 ml  L-1  water at 25, 50 and  75 DAE for each concentration along with water spray as control, were the treatment variables. Seed index of cotton was maximum (12.96 g) at spacing 60 cm × 30 cm and the lowest seed index (11.93 g) was recorded from spacing 45 cm × 30 cm. The highest seed index (13.62 g) was from control and the lowest (11.26 g) with 1 ml MC L-1 water at 50 DAE treatments. SI observed highest (15.01 g) from water  sprayed with 60 cm × 30 cm spacing  and marked lowest (10.33 g) at 3 ml MC L-1 water  at 25 DAE with 60 cm × 30 cm spacing treatment combinations. So, cotton cultivation in Sreepur, Gazipur areas may be accelerated with foliar application of mepiquat chloride @ 2 ml L-1 water at 25 DAE along with plant spacing of 60 cm x 30 cm for higher yield and quality.

Key words: Plant spacing, growth regulator, time of foliar, seed index, cotton.

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Measuring rainfall in different rice cropping season at Rangpur district in Bangladesh

ABSTRACT

This study examined the rainfall variability among Aus, Aman and Boro season from 1990 to 2020 in Rangpur district of Bangladesh. In this study, rainfall data (1990-2020) was used which gathered from Bangladesh Meteorological Department (BMD). To investigate the seasonal rainfall variation, linear trend analysis was employed. The result of the study exposed that diurnal, monthly and seasonal variation of rainfall were found much anomalies, where annual rainfall increased in Aus and Boro season but decreased in the Aman season. The findings of this research ensure that rainfall has had significant changes in Aus, Aman and Boro season. These changes could have an unfavorable impact on rain-based agriculture in Bangladesh. For sustainable agriculture, various environmental techniques, thresholding, and nationwide rainfall analysis can be useful to support adaptation planning for the rain-driven agricultural economy in Bangladesh.

Key words: Rainfall, season, variability

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Effect of different plant spacing along with concentrations of growth regulator (mepiquat chloride) and time of foliar application on lint index of cotton

ABSTRACT

Plant growth regulators (PGRs) are used in cotton production to optimize yield and quality and even suppressing excess growth whenever necessary. Experiments were conducted in 2017 at Cotton Seed Multiplication, Training and Research Farm, Sreepur, Bangladesh to study the response of lint index of cotton to different plant spacings, concentration and time of application of mepiquat chloride (MC) growth regulator. Plant spacings like 45 cm × 30 cm, 60 cm × 30 cm and 75 cm × 30 cm; MC spray @ 1.0, 2.0, 3.0 and 4.0 ml  L-1  water at 25, 50 and 75 DAE for each concentration along with water spray as control, were the treatment variables. Lint index (LI) of cotton was maximum (8.74 g) at spacing 60 cm × 30 cm and the lowest lint index (7.71 g) was recorded from spacing 45 cm × 30 cm. In respect of mepiquat chloride (MC), the highest lint index (9.99 g) was from 3 ml MC L-1 water at 25 DAE and the lowest (7.04 g) with 4 ml MC L-1 water at 25 DAE. Considering treatment combination, LI observed highest (10.30 g) at 4 ml MC L-1 water at 50 DAE with 45 cm × 30 cm spacing and marked lowest (7.00 g) at 4 ml MC L-1 water at 25 DAE with    75 cm × 30 cm spacing treatment combinations.

Key words: Plant spacing, growth regulator, time of foliar, lint index, cotton

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