Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Development of Management Approach Against Thrips-mite Complex of Chilli

Md. Motaher Hossain
Scientific Officer
Spices Research Centre, BARI, Shibganj, Bogura, Bangladesh

K. M. Khalequzzaman
Principal Scientific Officer (Plant Pathology)
Spices Research Centre (SRC), Bangladesh Agricultural Research Institute (BARI), Shibganj, Bogura, Bangladesh

Md. Tanjilur Rahman Mondal
Scientific Officer
Bangladesh Institute of Nuclear Agriculture, Mymensingh, Bangladesh

J. Alam
Program Officer,
Mennonite Central Committee, Bangladesh

Md. Shariful Islam
Agriculture Extension Officer
DAE, Ajmirigonj, Hobigonj, Bangladesh

Abstract/ Executive Summary:

The field experiment was conducted at Spices Research Centre, Shibganj, Bogura, Bangladesh during Rabi season of 2014-15 to develop an integrated management approach against thrips-mite complex of chilli. The treatments were five including control. Spraying of Chlorphenapyr (Intrepid 10SC) @ 1ml/litre of water + White sticky trap @ 40 traps/ha resulted the lowest thrips (0.86 thrips/leaf) and mite (0.97 mite/leaf) population with highest marginal benefit cost ratio (33.02). The highest percentage of thrips (87.02%) and mite (87.32%) population reduction over control with maximum red ripe chilli yield (12.72 t/ha) was also obtained from Chlorphenapyr + White sticky trap. Thrips and mite populations are negatively correlated with Chlorophyll Concentration Index of leaf. However, the lowest percentage of upward (19.05%) and dounward leaf curl (21.08%) was also obtained from Chlorphenapyr + White sticky trap treated plot followed by White sticky trap + Abamectin + Success (22.75% and 25.15%, respectively) while the highest percentage of upward (71.25%) and dounward leaf curl (82.38%) was obtained from untreated control. So, installation of sticky white trap along with spraying of Chlorphenapyr may be recommended for effective management of thrips-mite complex in chilli.

Keywords: Chilli, Pest Management, Thrips-mite complex, Integrated management

Location: Spices Research Centre, Shibganj, Bogura, Bangladesh

Start Date: 01-10-2014

End Date: 01-04-2015

Program Area: Pest Management

Commodity: Mite, Chilli

Objectives:

To develop an integrated management approach against thrips-mite complex of chilli.

Methodology:

The study was conducted at Spices Research Centre, Shibganj, Bogura, Bangladesh during Rabi season of 201415. The experimental plot was prepared with five ploughings and cross ploughings followed by laddering to break the clods as well as level the soil. The weeds and stubbles of previous crops were collected and removed from the soil. The unit plot size was 2.5 m × 1.5 m and spacing was 50 cm × 50 cm. The treatments were T₁=White sticky trap @ 40 trap/ha; T₂=Spraying of Chlorphenapyr (Intrepid 10SC) @ 1ml/l; T₃=White sticky trap+Chlorphenapyr (Intrepid 10SC) @ 1ml/l; T₄=White sticky trap+Abamectin (Vertimec 1.8EC) @ 1.2 ml/l+Spinosad (Success 2.5SC) @ 1.2 ml/l; T₅=White sticky trap+Bioneem plus (Azadirachtin 1EC) @ 1ml/l + Abamectin (Vertimec 1.8EC) @ 1.2 ml/l and T₆=Untreated control. Treatments were assigned in a randomized complete block design with three replications. BARI Morich-3 was used as test crop for this trial. The seedlings were transplanted on 02 November 2014. In addition to 5 t/ha of cow dung, the crop was fertilized with N₁₂₀ P₆₀ K₁₀₀ S₂₀ B₂ kg/ha (Anonymous, 2010). Three weeding were done at 25, 50 and 75 days after transplanting and three irrigations were done at 10-20 days interval during vegetative growth stage. To control Anthracnose of chilli, the crop was sprayed with Tilt 250EC @ 0.5ml/L of water at 65 DAT. Depending on the maturity, the red ripe chilli was harvesting started from March, 2015 and completed on 10 May, 2015. Population of thrips or mites was recorded with little modification of method described by Patel et al. (2009) from the under surface: for yellow mite and upper surface: for thrips at weekly interval from 3 terminal leaves of 5 randomly selected plants in each plot. Such observations were initiated with the appearance of thrips and continued up to last picking of the crop. The data thus obtained were converted as average number of thrips and mite per leaf. The samples were placed individually in zip-lock bag (6"×4") and taken to the laboratory for further counting under stereozoom binocular microscope (Olympus SZ-41, Japan). Thrips or mite number from such five plants were recorded (randomly selected) at 24 hrs before (pre-treatment count), and 3 rd, 10 th and 15 th after treatment application (post-treatment) and 10 th and 15 th day for evaluation of percentage leaf curl with little modification of Niles (1980). The Minolta SPAD 502 chlorophyll meter was used for the measurement of chilli leaf color. Yield of red ripe chillies from different plucking were revealed from each treated plots and computed as t ha-1. Another data were recorded on plant height at 112 DAT, Chlorophyll Concentration Index (CCI) at 112 DAT, fruit length, fruit diameter, single fruit weight and yield at harvest. The recorded data were analyzed and mean values were adjusted and separated by Duncan’s Multiple Range Test (DMRT) according to Gomez and Gomez (1984). The percentage reduction in mite and thrips population was assessed by adopting the formula given by Henderson and Tilton (1955).

Source of Information: International Journal of Scientific Research in Agricultural Sciences, 3(1), pp. 018-024, 2016; ISSN: 2345-6795

Article Link (Online Journal): http://dx.doi.org/10.12983/ijsras-2016-p0018-0024

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Installation of sticky white trap along with spraying of Intrepid 10SC (1ml/L of water) three times at an interval of 15 days from the first appearance of thrips and mite infestation showed better performance against thrips-mite complex of chilli with higher yield and economic return. For further study, we need to determine optimum doses of Intrepid 10SC with its spraying days of interval.

Knowledge Management: Journal