Abstract:The effect of different modes of pollination on quantitative and qualitative parameters of Egyptian clover, Trifolium alexandrinum L. was studied at Forage Section, Department of Genetics and Plant Breeding, CCS, Haryana Agricultural University, Hisar during 2012 and 2013. Maximum seed setting (81.5%) was recorded in A. mellifera pollination with an 8 frame colony (BP-8F) followed by 4 frame colony (BP-4F) (75.1%), open pollination (OP) (73.8%) and 2 frame colony (BP-2F) (71.5%). Maximum seed yield (2662.3 seeds) was observed in treatment BP-8F followed by BP-4F (2373.8), OP (2316.3) and BP-2F (2235.5). Still lower yield of 2103.0 seeds was found in hand pollination (HP) treatment that was significantly higher than the without insect pollination (WIP) treatment (1114.2). Minimum 1000-seed weight was observed in WIP (2.64 g). The seed weight of BP-4F (3.30), HP (3.20), BP-2F (3.17) and OP (3.03), the heaviest seeds were recorded in BP-8F (3.62 g/1000 grains) and it was at par with the treatment BP-4F (3.30 g). Highest seed germination per cent was recorded in BP-8F (94.7) followed by OP (90.7%). Lowest germination was found in WIP (84.7%). Though some work has been done on this aspect in India but comprehensive pollination studies has not been worked out.
Abstract. The present study on the effect of variety and planting date of rice on population of natural enemies of brown planthopper, Nilaparvata lugens (Stal) showed that during August, the mean population of spiders was statistically on par on CSR 30 and PR 114. The population differed with dates and was significantly (p=0.05) higher (9.0/10 hills)
Among all the tested fungicides, complete inhibition of the fungal growth i.e. 100.00 per cent was recorded with Bavistin (carbendazim) at 200 ppm and 500 ppm the tested concentrations. The next best fungicides in order of fungal growth inhibition were Carbendazim + Mancozeb (companion), Topsin-M (thiophanate methyl), Vitavax (carboxin + thiram) and Benomyl (benlate) which inhibited the fungal growth by Carbendazim was found significantly superior at 200 and 500 ppm with (100%) inhibition of mycelial growth followed by Companion and Topsin-M at 500 ppm and with (100%). Seed treatment with Bavistin (carbendazim) resulted in lowest wilt incidence (10.39%) result showed that increase with seed yield 1011.15 kg/ha was recorded in Carbendazim followed by companion that showed wilt incidence of 12.22 per cent. Both these fungicides were found to be statistically at par with each other. Next effective seed dresser were Topsin-M and Vitavax that showed wilt incidence of 14.33 and 21.55 per cent, respectively. These fungicides were found to be at par with best fungicides. Seed treatment with Benomy were found to be least effective which showed wilt incidence of 24.15 per cent and decrease with seed yield 617.90 kg/ha was recorded both the years.How to view point the article : Jat, Mukesh Kumar, Ahir, R.R. and Kakraliya, Gopal Lal (2017). Evaluation of fungicides as seed tratment against coriander wilt disease caused by Fusarium oxysporum f.sp. corianderii. Internat. J. Plant Protec., 10(1) : 92-95,
The temporal abundance of different floral visitors on Egyptian clover, Trifolium alexandrinum l. and correlation with weather parameters was studied at Forage Section, Department of Genetics and Plant Breeding, CCS, Haryana Agricultural University, Hisar during 2012 and 2013. The mean temporal abundance of A. dorsata was the maximum (4.90/m 2 /5 min.) followed by A. mellifera (2.69), H. armigera (2.24), Eristalinus spp. (1.59) and A. florea (1.20/m 2 /5 min.) during 2012. During 2013, A. dorsata abundance decreased to and it 3.08/m 2 /5 min. followed by A. mellifera (2.61), P. brassicae (2.03), Eristalinus spp. (1.91), Coccinella septempunctata (1.63) and A. florea (1.62/m 2 /5 min.).A. cerana abundance during 2012 was 0.30/m 2 /5 min. but became almost negligible (0.06) in 2013. Floral visitor's abundance was maximum at 1400 h (2.97/m 2 /5 min.) followed by at 1200 noon (2.66) and 1600 h (2.50) and least during the morning hours of 0600 (0.09) and 0800 h (0.42/m 2 /5 minutes). Abundance of A. mellifera and A. dorsata during 2012 had a highly significant positive correlation with wind speed (r=0.77 and 0.86) at 0800 h while the later was also correlated with maximum (negative) and minimum relative humidity at 1800 h (r=-0.89 and 0.85, respectively). Highlights •The hymenopterans floral visitors on T. alexandrinum were most abundant as compared to other floral visitors.• Apis dorsata was the most abundant floral visitor (4.90/m 2 /5 min.) followed by Apis mellifera (2.69/m 2 /5 min.), Helicoverpa armigera (2.24/m 2 /5) and Apis florea (1.20/m 2 /5).Egyptian clover, Trifolium alexandrinum L. commonly called berseem (Family Leguminaceae, sub-family Papilionaceae), owing to higher quantitative yield parameters viz., green fodder yield (85 t/ha) and multicut nature (4-6 cuts) along with qualitative parameters namely, succulency, high palatability, nutritive value (20% crude protein), digestibility (up to 65%) and continuous supply of over seven months (November to May) Egyptian clover is one of the most entomophilic crop requiring insects, especially bees for cross pollination.
Background: Pulses are having a number of constraints in their production as compared to their potential in India. Green gram is an important pulse crop of the country after chickpea and pigeonpea lacks optimum fertilizer management, which leads in reduced growth and yield. The current study aimed to study the effects of different levels of potassium and zinc application on growth, yield attributes, yield and quality of green gram. Methods: The field study was conducted during Kharif 2018 at Regional Research Station, CCS HAU, Bawal on green gram cultivar MH-421. The experiment was laid out in a split-plot design with three replications and treatments comprising four levels of potassium in main plots (0, 10, 20 and 30 kg K2O ha-1) and four levels of zinc in subplots (0, 12.5, 25 and 37.5 kg ZnSO4 ha-1). Result: The results indicated that growth parameters like plant height, number of branches, number of pods, number of seeds and dry matter production were released due to the application of potassium and zinc. The number of nodules, their fresh weight and quality parameters like protein content and seed index significantly increased with the application of potassium up to 20 kg K2O ha-1, but non-significant increment with zinc application. Seed and straw yield increased significantly with potassium and zinc application up to the levels of 20 kg K2O ha-1 and 25 kg ZnSO4 ha-1, respectively. Higher net monetary returns of Rs. 31528 ha-1 with B:C ratio (1.61) was recorded under the treatment combination K20Zn25 (20 kg K2O ha-1 along with 25 kg ZnSO4 ha-1). It was concluded that higher green gram yield with better quality and more net return was achieved when potassium and zinc were applied @ 20 kg K2O ha-1 and 25 kg ZnSO4 ha-1, respectively.
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