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Effect of Insecticides on Boll Rot Disease (xanthomonas Campestris Pv. Malvacearum (f. F. Smith) and Agronomic Characters of Cotton in Bangladesh

M.N. Rasel
Department of Entomology, Faculty of Agriculture, Hajee Mohammad Danesh Science &Technology University, Dinajpur 5200

M.S. Hasan
Department of Pathology, Faculty of Agriculture, Hajee Mohammad Danesh Science &Technology University, Dinajpur 5200

Mottakina Akter
Department of Entomology, Faculty of Agriculture, Hajee Mohammad Danesh Science &Technology University, Dinajpur 5200

Md. Faruk Hossain
Department of Pathology, Faculty of Agriculture, Hajee Mohammad Danesh Science &Technology University, Dinajpur 5200

S.M. Abul Hossain
Regional Cotton Research Centre, Sadarpur, Dinajpur 5200.

Abstract/ Executive Summary:

The study was carried out in the “Regional Cotton Research and Seed Multiplication Centre, Sadarpur, Dinajpur” during the year 2006-2007. Asataf 75SP, Admire 200 SL, Imitaf 20 SL, Dursban 20 EC, Chloropyriphos 20 EC, Actara 25 WG, Marshal 20 EC, Chloropyriphos 20 EC were applied at recommend dosages to observe the effect of insecticides on boll rot diseases (Xanthomonas campestris pv. malvacearum (F. F. Smith)) and agronomic characters of cotton. Findings of the study indicated that the new group insecticides such as Admire 200SL, Actara 25 WG and Imitaf 20 SL (all belong to the group neonicotenoides) were found effectiveness against the boll rot disease of cotton. When these three insecticides were applied the numbers of infested boll/plant were 1.33, 1.67, 2.33, respectively compared to 5.33 in control plot. The number of boll/plant were 35.33, 35.33, 32.00, respectively and 12.00 in the control. Individual boll weight were 3.92, 3.83, 3.83 gm, respectively and in the control it was 3.08 gm. The plant height were found 95.00, 96.67, 93.33 cm, respectively which was 66.67 cm, in control. Considering the variable costs like insecticide and labour Admire 200 SL and Actara 25 WG provided the maximum BCR of 7.80 and 7.38, respectively.

Keywords: Insecticides, Cotton, Boll rot diseases, Agronomic characters.

Location: “Regional Cotton Research and Seed Multiplication Centre, Sadarpur, Dinajpur”

Start Date: 00-00-2006

End Date: 00-00-2007

Program Area: Pest Management

Commodity: Diseases, Cotton

Objectives:

An insecticide highly protects the crop plants and allows them to grow in a healthy environment. As a result, number of bolls, plant height and individual boll weight are superior compared to unprotected crop. So, insecticides increase vigour and help to develop good agronomic characters and boll rot disease also decrease. But it is seen from the review and literatures such type of information have a great lack in Bangladesh. So, a study was under taken to know the effect of Asataf 75SP, Admire 200SL, Imitaf 20 SL, Dursban 20EC, Chloropyriphos 20EC, Actara 25WG and Marshal 20 EC on boll rot disease and agronomic characters and to reduce the escalating cost of cotton cultivation.

Methodology:

The study was conducted in the “Regional Cotton Research, Training and Seed Multiplication Farm, Sadarpur, Dinajpur” during the period from August 2006 to February 2007. The study was conducted in randomized complete block design (RCBD) with 8 treatments and 3 replications. The plot size was 5.4m x 5m. The spacing between block to block and plot to plot was 1.5 m and 1m, respectively and footpath was 2m. Seeds were sown in rows on the 3 August 2006; at the rate 15 kg/ha. A distance of 45 cm from plant to plant and 90 cm from row to row distance was maintained with depth of 1 cm to 1.5cm of the soil and these were covered with loose soil. A popular variety (CB-10) used this experiment. Application of fertilizers and intercultural operations such as mulching, weeding and irrigation etc were done as recommended for cotton crop in Bangladesh (Anonymous, 2008). Counts of boll rot disease were done after 2 weeks of DAS. In each replication 5 plants were selected randomly for the examination. Scouting was done once in a week and on the same day in each week. The scouting plants were selected along in a zigzag method throughout the field, so that a representative sample was obtained. Cotton was harvested from the inner rows of the plots excluding the border rows to give the yield/ha. The cotton from the bulk areas was bulked up. All cotton weighed at the same time to avoid the hygroscopic effects. Variable cost and net return was calculated as per Tague and Shelstad (1981) and Ali and Karim (1990). The benefit cost ratios were calculated by dividing the net return by total variable costs of each treatment. Data obtained in the field from each treatment were analyzed by one way ANOVA (Analysis of Variance) and the mean values were separated by DMRT.

Source of Information: J. Sci. Technol. (Dinajpur) Vol. 7: pp--- (2009) ISSN 1994-0386

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Considering the variable costs like insecticide and labour Admire 200 SL and Actara 25 WG provided the maximum BCR of 7.80 and 7.38, respectively

Knowledge Management: Journal