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Effect of Gaucho-fertilizer Interaction and Agronomic Characters on the Incidence of Pests of Smooth and Hairy Variety of Cotton in Bangladesh

S. M. A. Hossain
Cotton Agronomist
Regional Cotton Research Station, Dinajpur

M. A. Baqui
Professor
Department of Zoology, Jahangirnagar University, Savar, Dhaka

Abstract/ Executive Summary:

Fuzzy seeds of both smooth and hairy variety of cotton were treated by 5 dosages of Gaucho during 2005-06 at Sadarpur, Dinajpur. The results were compared with monocrotophos and untreated control. Efficacy of Gaucho on several insect pests of cotton in relation to standard and increased dosages of fertilizer was evaluated. Results indicated that the increased dosages of fertilizers improved plant quality for more insects attack in both treated and untreated control plants. Improvement of agronomic characters of cotton plant was demonstrated due to Gaucho treatment compared to monocrotophos and control.

Keywords: Ecology, Gaucho, Monocrotophos, Thereshold, Delinted, Fuzzy

Location: Sadarpur, Dinajpur under Regional Cotton Research Station

Start Date: 00-00-2005

End Date: 00-00-2006

Program Area: Pest Management

Commodity: Cotton

Objectives:

To find out the effect of Gaucho on agronomic characters of on the incidence of pest of smooth and hairy variety of cotton.

Methodology:

The experiment for the control of aphid was carried out during 2001-02 to 2003-04. The relative efficacy of Gaucho on the basis of increasing dosages and degree of suppression recorded during scouting. The treatment plot dimensions were 10 m x 10 m, laid out in a randomized complete block design, 7 treatments and replicated four times. The spacing between plot to plot 1 m and 2 m foot path respectively. The seed was treated with the seed dressing chemical, Gaucho-70 ws by different doses and compared it with the standard dose of monocrotophos-40 wsc and untreated check. The treatments were: Gaucho-70 ws-1.50gm/kg seeds, Gaucho-70 ws-2.50 gm/kg seeds, Gaucho-70ws-3.50 gm/kg seeds, Gaucho-70 ws-4.50 gm/kg seeds, Gaucho-70 ws-5.50 gm/kg seeds, Monocrotophose-40 wsc-1120 ml/ha, Untreated check (water spray). The fuzzy and delinted seeds of both varieties soaked in water within a plastic boll for half an hour and then remove water to make it a little bit dry. The powdered Gaucho poured into the bowl and stirred for 10-15 minutes for complete adherence of the chemical to the individual seed coat. It was dried in the sun for 30-45 minutes over a clean floor or on paper and was sown in the trial plot. Thorough examination of plants were done randomly in the field. Five plants were taken from each replication by random selection. Twenty plants were scouted from each treatment unabashedly. Sprays were applied when the pest levels exceeded the relevant threshold at regular weekly counts. Monocrotophos 40 EC was applied to suppress the pest below ETL. In case of untreated check only water was sprayed. Spraying was done by the knapsack spray using the rate 1120 ml & volume 100-200 liters/ha.

Source of Information: Int. J. Sustain. Crop Prod. 5(4):46-50, (2010)

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The increased dosages of fertilizers improved plant quality for more insects attack in both treated and untreated control plants. Improvement of agronomic characters of cotton plant was demonstrated due to Gaucho treatment compared to monocrotophos and control.

Knowledge Management: Journal