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Chhuneja, Pardeep Kumar
- Integrated Whitefly [Bemisia tabaci (Gennadius)] Management In Bt-Cotton in North India: An Agroecosystem-Wide Community-Based Approach
Abstract Views :236 |
PDF Views:78
Authors
Affiliations
1 Punjab Agricultural University, Ludhiana 141 004, IN
2 ICAR-Central Institute of Cotton Research, Sirsa 125 055, IN
3 Department of Agriculture (Punjab), Mohali 160 055, IN
1 Punjab Agricultural University, Ludhiana 141 004, IN
2 ICAR-Central Institute of Cotton Research, Sirsa 125 055, IN
3 Department of Agriculture (Punjab), Mohali 160 055, IN
Source
Current Science, Vol 119, No 4 (2020), Pagination: 618-624Abstract
In 2015, a whitefly epidemic devastated cotton in about 1.5 m ha in North India and reduced the yield level to about 35% of average productivity in the state of Punjab. Protection of crop from sucking insect pests, including whitefly, is primarily based on insecticides. A more knowledgeintensive and multidisciplinary approach which can lead to a dramatic reduction in chemical use combined with unprecedented improvement in productivity should qualify as a worthy successor to the green revolution. Interventions include host plant resistance, robust surveillance and ETLbased decision-making, managing non-crop hosts, pest resurgence curtailment through targeted biopesticide and pesticide application, crop nutrition, and abiotic stress amelioration. Research refinements even as implementation progressed, high intensity outreach and cotton belt-wide implementation not just restored productivity, but also resulted in achieving record yields of 756, 750 and 778 kg lint/ha in 2016, 2017 and 2018 respectively, compared with 197 kg lint/ha in 2015 in Punjab, and pesticide savings during these years over 2015 were INR 2589/ha, 2808/ha and 3060/ha respectively. The success story and its modus operandi have implications for ‘new agriculture’, which needs to be disseminated and debated widely.Keywords
Agroecosystem, Bemisia tabaci, Bt-cotton, Community-Based Approach.Full Text
- Effect of Sub-Lethal Doses of Thiamethoxam on the Memory of Apis mellifera Linnaeus
Abstract Views :121 |
PDF Views:66
Authors
Affiliations
1 Department of Entomology, Punjab Agricultural University, Ludhiana 141 004, IN
1 Department of Entomology, Punjab Agricultural University, Ludhiana 141 004, IN
Source
Current Science, Vol 124, No 4 (2023), Pagination: 451-456Abstract
Honey bees forage owing to their remarkable ability to learn and memorize their cues. The effect of thiamethoxam on the memory of bees was studied through the proboscis extension reflex (PER). The bees that consumed higher doses of thiamethoxam (0.93–5.76 ng bee–1) showed lesser sensitivity to sucrose than those that consumed lower doses (0.03–0.64 ng bee–1). Bees sensitivity was least affected at the highest sucrose concentration (50% w/v). PER in trained and treated bees recorded after 2 and 24 h of consuming the various doses of thiamethoxam showed a significant reduction in memory (13.3–82.2% and 0.00–68.9% respectively). Field-level studies are required to validate the results and formulate strategies at the national level for safeguarding the bees.Keywords
Apis mellifera, Memory, Proboscis Extension Reflex, Thiamethoxam, Sucrose Concentration.Full Text
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