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Mustard aphid infestation and yield of raya as affected by dates of sowing and meteorological parameters

Lakhvir Kaur Dhaliwal, S. S. Hundal, J. S. Kular, Sarabjot Kaur Chahal, Anand Aneja

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Abstract

Field experiments were conducted at Punjab Agricultural University, Ludhiana during rabi season 2003–04 and 2004–05 to evaluate the effect of date of sowing on mustard aphid infestation and yield of raya. Raya (variety PBR-91) was sown on two different dates viz. first week of November (D1) and last week of November (D2). Peak infestation index was lower while raya yield was higher during 2003–04 as compared to 2004–05. The aphid infestation index in D2 was higher as compared to D1 during both crop seasons. The aphid infestation index generally showed a negative correlation with temperature both during 2003–04 (D1) and 2004–05 (D1 and D2). The multiple regression between aphid infestation index (Y) and meteorological parameters using pooled data over dates of sowing during 2004–05 was as follows:

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What this paper is about

Field experiments were conducted at Punjab Agricultural University, Ludhiana during rabi season 2003–04 and 2004–05 to evaluate the effect of date of sowing on mustard aphid infestation and yield of raya. Raya (variety PBR-91) was sown on two different dates viz. first week of November (D1) and last week of November (D2). Peak infestation index was lower while raya yield was higher during 2003–04 as compared to 2004–05. The aphid infestation index in D2 was higher as compared to D1 during both crop seasons. The aphid infestation index generally showed a negative correlation with temperature both during 2003–04 (D1) and 2004–05 (D1 and D2). The multiple regression between aphid infestation index (Y) and meteorological parameters using pooled data over dates of sowing during 2004–05 was as follows:

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Available abstract

Field experiments were conducted at Punjab Agricultural University, Ludhiana during rabi season 2003–04 and 2004–05 to evaluate the effect of date of sowing on mustard aphid infestation and yield of raya. Raya (variety PBR-91) was sown on two different dates viz. first week of November (D1) and last week of November (D2). Peak infestation index was lower while raya yield was higher during 2003–04 as compared to 2004–05. The aphid infestation index in D2 was higher as compared to D1 during both crop seasons. The aphid infestation index generally showed a negative correlation with temperature both during 2003–04 (D1) and 2004–05 (D1 and D2). The multiple regression between aphid infestation index (Y) and meteorological parameters using pooled data over dates of sowing during 2004–05 was as follows:

Key concepts: Infestation, Aphid, Sowing, Forensic science, Veterinary medicine, Crop, Non-invasive ventilation, Yield (engineering)

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