Impact of Insect Pollinators on the Yield of Canola (<i>Brassica napus</i>) in Peshawar, Pakistan

Shakeel, Muhammad Taimoor; Inayatullah, Mian

doi:10.3954/jaue12-07.1

Cited by 12 publications

(7 citation statements)

References 16 publications

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“…Maintenance of high germinability and vigour of seeds during storage was the result of production of well developed, bold and matured seeds owing to efficient supplementary insect pollination in this crop. The present finding agrees with the results of similar studies by earlier workers in mustard (Mahadik et al, 2019;Subedi and Subedi, 2019;Sekhon et al, 2020;Yadav et al, 2021), rape seed (Bartomeus et al, 2014;Garratt et al, 2018), canola (Shakeel and Inayatullah, 2013) and sunflower (Bhatt et al, 1996)…”

Section: Discussionsupporting

confidence: 93%

Maximizing seed yield and quality in Indian mustard (Brassica juncea L.) through supplementary insect pollination

A. Jana,

Swain,

SPMonalisa

2024

EEC

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An investigation was undertaken during Rabi 2021-22 in the Department of Seed Science and Technology, FAS, SOADU, Bhubaneswar to study the impact of various supplementary pollination techniques viz. 1. Open pollination (OP) with spray application of 5% honey solution, 2. OP with spray application of 10% jaggery solution, 3. OP without any spray application, 4. Intensive pollination with honey bees (Apis cerana indica) and 5. Pollinators exclusion, on seed yield and quality in Indian mustard (Brassica juncia L.). The field experiment was conducted following RBD with four replications. Appropriate agronomic practices were followed for raising seed crops. Observations were recorded on five yield attributing traits viz. number of siliqua per plant, length of siliqua, number of healthy and wrinkle seeds per siliqua and 1000-seed weight; two seed yield parameters viz. per plant and per hectare seed yield; seven seed quality attributes viz. germination percentage, shoot and root length of seedling, dry weight of seedling, seed vigour indices (SVI-I & SVI-II) and storability of seed; and two biochemical seed quality traits viz. oil and protein content of the seed. A significant effect of planned pollination methods was observed on most of the yield and quality traits. The mean number of siliqua per plant, siliqua length, healthy seeds per siliqua, 1000-seed weight, seed yield per plant and per hectare, seed germination percentage, shoot and root length of seedling, dry weight of seedling, SVI-I and SVI-II, oil content of seed and germination percentage of seed after four months of storage were highest in OP with spray application of honey solution (80, 5.70 cm, 15.03, 3.80 g, 11.83 g, 8.7 q, 97.25%, 3.2 cm, 2.9 cm, 2.6 mg, 593.0, 252.9, 34.8% & 85, respectively) followed by OP with spray application of jaggery solution (77.15, 5.18 cm, 14.10, 3.85 g, 10.05 g, 6.83 q, 94, 2.9 cm, 2.6 cm, 2.4 mg, 517.1, 225.7, 33.4% & 80, respectively) in comparison to pollinators exclusion (62.68, 4.38 cm, 11.73, 3.08 g, 6.60 g, 5.54 q, 79, 2.3 cm, 2.3 cm, 1.8 mg, 364.4, 142.1, 31.2% & 67, respectively) which showed the lowest values for all these traits. OP without any spray application and intensive pollination with honeybees resulted in moderate enhancement of all these traits. Thus, it may be concluded that for achieving higher seed yield and quality in this crop, insect pollinators may be attracted by spray application of honey or jaggery solution to the seed crop of mustard during the flowering period.

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Section: Discussionsupporting

confidence: 93%

Maximizing seed yield and quality in Indian mustard (Brassica juncea L.) through supplementary insect pollination

A. Jana,

Swain,

SPMonalisa

2024

EEC

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“…We found the differences in total seed production between control plants and plants with pollen addition to be mainly a consequence of the higher fruit set by pollen addition plants. Increased fruit set in rapeseed with insect pollination has been reported from several studies [ 53 , 54 , 58 , 59 ], as well as an effect on the number of seeds per fruit capsule [ 53 , 54 , 58 , 59 ] and seed weight [ 53 , 54 , 56 , 59 ] (but no effect in [ 58 ]), even though the effects vary with variety. The increase in fruit set with added pollination in our study was large (cf.…”

Section: Discussionmentioning

confidence: 99%

A heterogeneous landscape does not guarantee high crop pollination

et al. 2016

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The expansion of pollinator-dependent crops, especially in the developing world, together with reports of worldwide pollinator declines, raises concern of possible yield gaps. Farmers directly reliant on pollination services for food supply often live in regions where our knowledge of pollination services is poor. In a manipulative experiment replicated at 23 sites across an Ethiopian agricultural landscape, we found poor pollination services and severe pollen limitation in a common oil crop. With supplementary pollination, the yield increased on average by 91%. Despite the heterogeneous agricultural matrix, we found a low bee abundance, which may explain poor pollination services. The variation in pollen limitation was unrelated to surrounding forest cover, local bee richness and bee abundance. While practices that commonly increase pollinators (restricted pesticide use, flower strips) are an integral part of the landscape, these elements are apparently insufficient. Management to increase pollination services is therefore in need of urgent investigation.

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“…Crops belonging to family Brassicaceae are predominantly dependent on insect pollination (Entomophilous). Increase in seed quality and quantity is possible through pollination (Abrol, 2007, Shakeel and Inayatullah, 2013, Shakeel and Mian Inayatullah, 2015). The role of cross-pollination between cruciferous crops is majorly played by honey bees.…”

Section: Introductionmentioning

confidence: 99%

Insect pollinators diversity and abundance in Eruca sativa Mill. (Arugula) and Brassica rapa L. (Field mustard) crops

Shakeel

Ali²,

Ahmad

et al. 2019

Saudi Journal of Biological Sciences

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Studies on the insect pollinators diversity and their relative abundance in Eruca sativa Mill. (Arugula) and Brassica rapa L. (field mustard) was carried out during spring season from February to April consecutively during all the three years of 2016–18. Insect pollinators observed belonged to four orders i.e. Hymenoptera, Diptera, Lepidoptera, and Coleoptera. A total of 20 major species of insect pollinators were recorded. The highest abundance of pollinator species belonged to Hymenoptera. The most prominent insect pollinator species were Apis mellifera followed by other three honey bee species of A. cerana, A. florea, and A. dorsata respectively. Some species of solitary bees were also recorded. From Diptera, four species of syrphid fly and one species from Muscidae family were also recorded. Insect pollinators recorded from order Lepidoptera were Pieris brassicae, Vanessa cardui, and Papilio demoleus. Lady bird beetle Coccinella septempunctata was recorded from Coleoptera order as occasional visitor. It was noticed that E. sativa attracted more insect pollinators than B. rapa which may be attributed to different amount and chemical properties of nectar, with number of pollen grains, and flower canopy of both crops. Further studies are needed to confirm the reasons for higher pollinator visitation to E. sativa than B. rapa through chemical analysis of nectar, amount of pollens, flower physiology and phenology of both crops.

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Impact of Insect Pollinators on the Yield of Canola (Brassica napus) in Peshawar, Pakistan

Cited by 12 publications

References 16 publications

Maximizing seed yield and quality in Indian mustard (Brassica juncea L.) through supplementary insect pollination

Maximizing seed yield and quality in Indian mustard (Brassica juncea L.) through supplementary insect pollination

A heterogeneous landscape does not guarantee high crop pollination

Insect pollinators diversity and abundance in Eruca sativa Mill. (Arugula) and Brassica rapa L. (Field mustard) crops

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