PJB-2023-408
Impact of varied farming systems on arthropod dynamics and quality of soil and basmati rice under sub-tropical conditions
K S Suri
Abstract
The impact of different crop production systems on arthropod diversity, enzymatic activity, soil microflora and fruit quality of basmati rice was studied during 2017-2019 at Ludhiana. Highest population of stem borer (3.07 %), leaf folder (8.90 %) during 2019-8-19 and plant hopper (6.95 hoppers/hill) during 2016-17, was observed in organic fields followed by IPM and conventional fields during 2017-18. The mean spider population (no.) was found to be significantly higher under organic conditions (1.44) in contrast to conventional (0.52) and IPM (1.45) while the highest green mirid population (no.) was observed to be 2.20 in organic fields. Analysis of rice grain samples for pesticide residues showed that samples from organic & IPM fields were free from the pesticide residues whereas collected field samples showed the presence of chlorpyriphos and monocrotophos during 2017. The flavonoids, antioxidants, activity of alkaline phosphatase and urease from organic fields was higher in contrast to conventional fields.
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