Abstract
A field trial was conducted to study the impact of various potato germplasm against aphids, Myzus persicae (Sulzer) and Aphis gossypii Glover (Aphididae: Hemiptera) during rabi season from November to March in 2012-2013 and 2013-2014, respectively at Adisaptagram Block Seed Farm, Hooghly, West Bengal. The population of aphids was started on potato crop in between third week of December and first week of January irrespective of various germplasms, except K. Chipsona-2, where its infestation was initiated during second and third week of January. Then, their population was gradually increased to reach its critical level (ETL) during first and second week of January in most of the potato germplasm, except in K. Anand, K. Chipsona-1, K. Chipsona-2 and Sailaja, where it was crossed in between fourth week of January and first week of February. The peak population of aphids was observed during third and fourth week of February in most of the potato germplasm. It was observed that K. Ashoka, K. Badshah, K. Chandramukhi, K. Jawahar, K. Jyoti and K. Pukhraj were highly susceptible to the pests, while K. Anand and K. Sutlez were moderately susceptible but K. Chipsona-1 , K. Chipsona-2 and K. Sailaja were less susceptible or tolerant to the pests. Maximum tuber yield (t/ha) of potato was recorded in K. Badshah (36.58 - 43.92) while it was lowest in K. Chandramukhi (22.08 - 22.12).
Highlights
Potato, Solanum tuberosum L. is generally grown in all most all states in India
Earlier potato cultivation was largely confined to districts of Hooghly, Burdwan and West Midnapore but with the increasing facilities of irrigation, introduction of high yielding early maturing varieties and development of suitable agronomic practices potato cultivation is gradually being increased to other district of the state (Anonymous, 2005) [3]
Severe mosaic and potato leaf roll viruses were readily transmitted by aphids, while mild mosaic was partially transmitted by aphids (Khurana, 1999) [8]
Summary
Solanum tuberosum L. is generally grown in all most all states in India. More than 90% of potatoes are. Among the various states of the country, Uttar Pradesh, West Bengal and Bihar accounted for nearly 71% area and 76% production of the country (Chadha, 2002) [1]. Aphid, Myzus persicae (sulzer) and Aphis gossypii Glover (Aphididae: Hemiptera), is one of the most important sucking pests, to transmit viral diseases on potato crop (Konar et al 2001) [7]. Severe mosaic and potato leaf roll viruses were readily transmitted by aphids, while mild mosaic was partially transmitted by aphids (Khurana, 1999) [8] These viral diseases are one of the limiting factors for virus disease free potato seed tubers production in West Bengal. A field study was conducted to work out the effectiveness of various potato germplasms against aphids for viral disease free potato seed tubers production in the region without polluting the environment
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