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Effect of Granular Insecticides on White Grubs and Top Shoot Borer and Yield of Sugarcane

M.M.Biswas
Sugarcane Research & Training Institute, Ishurdi, Pabna, Bangladesh.

R.Kundu
Sugarcane Research & Training Institute, Ishurdi, Pabna, Bangladesh.

A.Mannan
Sugarcane Research & Training Institute, Ishurdi, Pabna, Bangladesh.

Abstract/ Executive Summary:

The experiment was carried out in 1986-87 and 1987-88 cropping seasons in Pratap Farm under Setabganj Sugar Mills Ltd. Dinajpur. Soil applications of Furadan 5G and Curaterr 3G @ 2.5 kg ai/ha along the cane rows (var. Latari Jaba C) followed by irrigation during March and April in November planted fields controlled the white grubs effectively. The top shoot borer infestation was also reduced significantly (P<0.05) over the untreated control in all the treated plots with insecticides even at the application rate of 2.0 kg ai/ha. All the treatments with insecticides and their applied doses showed increased cane yield ranging from 78.9-102.0% in 1986-87 and 32.9- 58.4% in 1987-88 cropping season over the untreated control.

Keywords: Effect,Granular insecticides,Top shoot borer, Yield,Sugarcane

Location: Pratap Farm under Setabganj Sugar Mills Ltd. Dinajpur

Start Date: 00-00-1986

End Date: 00-00-1988

Program Area: Pest Management

Commodity: Sugarcane

Objectives:

To investigate whether the doses of some granular insecticides meant for controlling white grubs might prove equally effective in. reducing TSB population in the predominantly grub prone sandy areas of Pratap farm under Setabganj Sugar Mills Ltd., Dinajpur

Methodology:

The top shoot borer and the white grubs were abundant in both 1986-87 and 1987-88 cropping seasons. The experiment was laid out in a randomized complete block design with three replications. The size of the plots was 12m X 8m, block to block distance was 2m and plot to plot 1 m in both the years. Variety used was Latari Jaba-C (L. J. C) planted in November. The treatments were two doses (2.0 kg and 2.5 kg ai/ha) each of Furadan (3%), Curaterr (3%) and Furadan (5%) granular formulations and the untreated control. Furrows were made along the cane rows by a bullock-driven slough and the chemicals were broadcasted in the furrows as well as in the space between the furrows, covered with soils and then irrigated. Before irrigation, individual plots were surrounded by soil ridges to protect onrush of water from one plot to another. The chemicals were applied once in March. (tillering stage) and then in April (tillering stage) maintaining one month gap between two applications. Pre-application data on the top shoot borer infestation was recorded per plot for each of the treatment including the untreated control. Pre-application count of grubs was not taken because the chemicals were applied synchronized with adult (bettle) emergence when they were at their pre-ovipostion or egg laying stage during late February/ early March. It would be difficult to detect grubs for records during March as most of the beetles remain under soils for oviposition. Miah and Shahjahan (1983) reported the middle of March as the peak period of emergence of all the beet/es. Application of chemicals and collection of data were done on the basis of their observations. Final data on the top shoot borer infestation and the only data on the population of the white grubs were recorded per plot after one month of the last chemical application. For the white grubs, 5 clumps/plot were randomly uprooted by digging an area of 60 cm X 60 cm to a depth of 40 cm from each clump with a spade. The soils so dug were checked carefully for recording all the larvae (adults if present) attacking canes in a plot. The yield of canes per plot was recorded at harvest. Weight of the uprooted cane stalks of 5 clumps per plot for the white grubs population count were recorded and added to the weight of the cane yield at harvest.

Source of Information: Bangladesh J. Sugarcane, 16 : 89-94 July, 1994

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The top shoot borer infestation was also reduced significantly (P<0.05) over the untreated control in all the treated plots with insecticides even at the application rate of 2.0 kg ai/ha. All the treatments with insecticides and their applied doses showed increased cane yield ranging from 78.9-102.0% in 1986-87 and 32.9- 58.4% in 1987-88 cropping season over the untreated control.

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