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Effect of Gaucho on Incidences of Diseases in Upland Cotton, Gossypium Hirsutum 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 with 5 rates of Gaucho as seed dresser in Sadarpur, Dinajpur during 2005-2006. The results of the damaged bolls were compared with the foliar monocrotophos and untreated control. It revealed that cotton plants received higher dosages of Gaucho recorded significantly lower boll damaged compared to monocrotophos. Lower dosages of Gaucho however, were inferior to monocrotophos in many instances. Control plants showed maximum damaged bolls than treated plants.

Keywords: Gaucho, Monocrotophos, Fuzzy, Lint

Location: Sadarpur, Dinajpur

Start Date: 00-00-2005

End Date: 00-00-2006

Program Area: Pest Management

Commodity: Diseases, Cotton

Objectives:

To observe the effectiveness of using seed treatment with imidacloprid (Gaucho) to reduce the incidence of bean leaf role virus (BLRV).

Methodology:

The trial was carried out at the cotton research station, Sadarpur, Dinajpur during the year 2005-06. Cultivars CB-3 (smooth) and CB-9 (hairy) with fuzzy and delinted seeds. Plot dimensions were 10m x 10m, laid out in a randomized complete block design, 7 treatments and replicated four times. The spacing between plot to plot 1m and 2m foot path respectively. Counting started from the Juvenile stage to the later part of the plant. It was done once in a week. The sampling was random; taking 5 plants from each replication. Total numbers of bolls and damaged bolls were counted. The mean values of both smooth and hairy variety were recorded. The seed was treated with the seed dressing chemical, Gaucho-70ws by different doses and compared it with the standard dose of monocrotophos40wsc and untreated check. The treatments were: a) Gaucho-70ws-1.50gm/kg seeds b) Gaucho-70ws-2.50gm/kg seeds c) Gaucho-70ws-3.50gm/kg seeds d) Gaucho-70ws-4.50gm/kg seeds e) Gaucho-70ws-5.50gm/kg seeds f) Monocrotophose-40wsc-1120ml/ha g) 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 was 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 wsc 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 1120ml & volume 100-200 liters/ha.

Source of Information: Int. J. Sustain. Crop Prod. 5(4):59-61(November 2010) ISSN-1991-3036 (Online) & ISSN-2075-1621 (Optical)

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Cotton plants received higher dosages of Gaucho recorded significantly lower boll damaged compared to monocrotophos. Lower dosages of Gaucho were inferior to monocrotophos in many instances.

Knowledge Management: Journal