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Seasonal Abundance of Aphids (myzus Persicae) and Diversity of Viral Diseases in Relation with Temperature in Potato

Dr. Mahbuba Begum
Senior Scientific Officer
Tuber Crops Research centre Bangladesh Agricultural Research Institute Joydebpur, Gazipur-1701

Mst. Mazida Khatun
Scientific Officer
Tuber Crops Research centre Bangladesh Agricultural Research Institute Joydebpur, Gazipur-1701

B. K. Goswami
Chief Scientific Officer
Tuber Crops Research Centre TCRC, BARI Joydebpur, Gazipur

M. Z. Hoque
Senior Scientific Officer
Tuber Crops Research Centre TCRC, BARI Joydebpur, Gazipur

M. I. Hossain
Scientific Officer
Tuber Crops Research Centre TCRC, BARI Joydebpur, Gazipur

Abstract/ Executive Summary:

Field experiments were conducted on the seasonal abundance of aphids and diversity of viral diseases in relation with temperature in potato at TCRC, BARI, Gazipur. Potato virus incidence was found at higher levels (0.42 to 10.42%) in the variety Diamant in all stages during germination to 60 DAS (days after sowing) compared to other varieties. Virus showing symptomatic plants up to 37 DAS got maturity within 60 to 65 days and 45 and 60 DAS got maturity at 70-80 days and 90 days, respectively. The average yield of infected plants with virus alone and in combination provided lower ranged from 4.99 to 13.89 t/ha, whereas healthy plant (virus free) gave the average yield at 32 t/ha. Aphid abundance varied significantly among potato varieties and was highly affected by time interaction. The highest number of aphids observed at younger stage of potato at 45 to 60 DAS. The aphid population develops faster and has greater reproductive capacity under fluctuating temperature with the optimal temperature for its population growth ranged from 18.75 to 22.15°C from the mid to last week of February, 2013 and then the aphid population slightly decreased with the increasing temperature.

Keywords: Temperature, Diversity, Aphid, Virus, Potato

Location: Gazipur

Start Date: 2012-13

End Date: 2014-15

Program Area: Pest Management

Commodity: Vegetables

Objectives:

i) To identify seasonal patterns of viruses and aphids during growing season of potato ii) To observe their association with temperature.

Methodology:

The experiment was conducted at TCRC, BARI, Gazipur during December, 2012 to February, 2013 with four potato varieties viz. Diamant, Cardinal, Diamant and Granola. The experiment was laid out in randomized complete block design with four replications. The plot size was 3 m × 3 m with spacing of 60 cm × 25 cm. Recommended doses of fertilizers (N: P2O5: K2O: S @ 160:100:160:20 Kg/h) were applied and other agronomic practices were done accordingly. Foundation seed collected from BSPC, Debigonj was used in this experiment. The crop was planted on 27. 11. 2012 and harvested on 26. 02. 2013. Data collected included aphid population in relation with temperature, virus disease incidence, and tuber yield.

Source of Information: Annual Report - 2012-2013

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) : 100000/-

Achievement/Findings:

Potato variety Diamant found susceptible to virus incidence at higher levels (0.42 to 10.42%) in all stages during germination to 60 DAS (days after sowing) compared to other varieties. Aphid abundance varied significantly among potato varieties. The highest number of aphids observed at younger stage of potato at 45 to 60 DAS. The aphid population develops faster and has greater reproductive capacity under fluctuating temperature with the optimal temperature for its population growth ranged from 18.75 to 22.15°C from the mid to last week of February, 2013 and then the aphid population slightly decreased with the increasing temperature.

Knowledge Management: Report/Proceedings