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Effect of Time of Planting and Harvesting of Potato on the Infestation of Epilachna Beetle

Md. Ibrahim Ali
Regional Agricultural Research Station, Ishurdi, Pabna.

Md. Wahed Baksha
Regional Agricultural Research Station, Ishurdi, Pabna.

Abstract/ Executive Summary:

The potato variety Multa (2nd generation) was studied with four. planting and harvesting dates (16 treatments). Epilachna beetles caused significantly greater percentages of potato plant and leaf infestation in early planting treatments than in late planting. But the infestation of this insect pest had no effect on the potato yield. Early planting and harvesting resulted in significantly higher yield than the late planting and harvesting.

Keywords: Time of planting, Harvesting, Potato, Epilachana beetle

Location: Regional Agricultural Research Station, Ishurdi, Pabna

Start Date: 00-00-1978

End Date: 00-00-1979

Program Area: Pest Management

Commodity: Potato

Objectives:

To assess the time of peak abundance of Epilachna beetles on the potato crops.

Methodology:

The studies were undertaken at the Regional Agricultural Research Station (under BARI), Ishurdi, Pabna during the rabi season between 1978 and 1979 with the potato variety, Multa (2nd generation). The crop was planted on 18.10.78 (T₁), 5.11.78 (T₂), 18.11.78 (T₃) and 5.12.78 (T₄) and harvested at 70 (H₁), 80 (H₂), 90 (H₃) and 100 (H₄) days after planting. The experiment was laid out in a split-ptot design with four replication. The unit plot size was 3.05m X 305m. No artificial infestation of the pests was done and no control measures were undertaken against these pests. The agronomical and cultural practices like fertilizer, irrigation, spacing etc. were similar in all the treatments. The recording of data was started after 15 days of germination and was continued after each 15 days till the harvesting of the crop and their averages were found out. For calculating the percentages of plant infestation, the number of healthy and infested plants of 50 % of total plant population of each plot was counted. For leaf infestation the total number of healthy and affected leaves of 10 randomly selected plants from each plot was counted. In case of finding the extent of leaf damage 100 leaves were randomly taken from each plot and graded from zero to ten (no infestation to severely infested) according to the area of leaf surface infested by the pest and the averages were found out. The data were analyzed statistically.

Source of Information: Bangladesh Horticulture, 8(1):33-35,1980

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Epilachna beetles caused significantly greater percentages of potato plant and leaf infestation ill early planting treatments than in late planting. But the infestation of this insect pest had no effect on the potato yield. Early planting and harvesting resulted in significantly higher yield than the late planting and harvesting.

Knowledge Management: Journal