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Sharma, Surender K.
- Palynological Study of Pollens of Some Important Bee Floral Plants in Kangra District of Himachal Pradesh
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Authors
Affiliations
1 Department of Entomology, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur - 176062, IN
1 Department of Entomology, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur - 176062, IN
Source
Himachal Journal of Agricultural Research, Vol 45, No 1&2 (2019), Pagination: 66-75Abstract
Shivalik region of Himachal Pradesh has a great diversity of pollen and nectar sources and good potential for commercial beekeeping. Studies on the morphological characteristics of pollen grains were carried out at Bee Research Station, Nagrota Bagwan of CSK Himachal Pradesh Agricultural University, Palampur, Himachal Pradesh during the year 2018-2019. This study was opined to explore 60 blooming plants of different group viz., oilseed crops, forest and fruit trees, vegetables and ornamental plants. Fresh and matured pollens were collected at the time of anthesis, washed with 70% ethyl alcohol and slides were prepared using DPX mountant. With an aid of Phase Contrast Microscope both polar and equatorial lengths of pollen as morphological features of 60 pollen types were described. The dominant pollen type belonged to family Rosaceae (8) followed by Brassicaceae (6), Asteraceae (4) and Verbenaceae (3).Keywords
Pollen, Morphological Characteristics, Polar, Equatorial.Full Text
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- Effect of Different Natural Products and Neonicotinoids on the Foraging Activity of Bees on Mustard
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Authors
Affiliations
1 Department of Entomology, College of Agriculture CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur-176 062, IN
2 Beekeeping Research Station, Nagrota Bagwan, Kangra (HP), IN
1 Department of Entomology, College of Agriculture CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur-176 062, IN
2 Beekeeping Research Station, Nagrota Bagwan, Kangra (HP), IN
Source
Himachal Journal of Agricultural Research, Vol 48, No 01 (2022), Pagination: 131-134Abstract
Different natural products, azadirachtin, and neonicotinoids were evaluated for their effect on the foraging activity of Apis mellifera on mustard (Brassica juncea). The first spray was given at 50 % flowering of the crop. The findings suggested that thiamethoxam 25 WG and imidacloprid 17.8 SL treatments experienced less bee visits after 1 day of spray. After 2nd and 3rd day of spray, minimum number of bees was recorded in thiamethoxam as compared to other treatments. After 3 days of spray, there was 58.8 per cent reduction in the number of bees per 5 flowers per 5 minutes in thiamethoxam treatment. On fourth day, normal bee activity was resumed in all the treatments except thiamethoxam treated plots. In imidacloprid seed treatment, there was minimum reduction in the number of bees over untreated check.Keywords
Apis mellifera, neonicotinoids, natural products, mustardFull Text
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