scholarly journals Insect Pollinators of Pumpkin (Cucurbita pepo L.) and their Foraging Behaviour

Author(s):  
S. R. Umesh ◽  
Anil Kumar Vyas ◽  
M. K. Mahla
2011 ◽  
Vol 59 (6) ◽  
pp. 582 ◽  
Author(s):  
C. Q. Nghiem ◽  
C. E. Harwood ◽  
J. L. Harbard ◽  
A. R. Griffin ◽  
T. H. Ha ◽  
...  

Floral phenology and morphology of colchicine-induced auto-tetraploid trees of Acacia mangium Willd. (AM-4x) growing in Vietnam were compared with adjacent diploid A. mangium (AM-2x) and A. auriculiformis A.Cunn. ex Benth (AA-2x). Flowering lasted for several months with a slightly later peak flowering period for A. auriculiformis (December–January), than for A. mangium (November–December). Flower spikes of AM-4x were shorter and had fewer flowers per spike than those of AM-2x, but were longer and had more flowers than AA-2x. Percentages of male to hermaphrodite flowers were less than 23% for all three species/ploidy combinations. Flowers of AM-4x had slightly shorter styles than did AM-2x, but AM-4x stigma and polyad diameters were greater. For all polyad-stigma combinations among species/ploidy levels, at least one polyad could be accommodated. AM-4x had fewer (13) ovules per ovary, compared with AM-2x and AA-2x (14–16). AM-4x set fewer (less than 3) seeds per pod than did AM-2x and AA-2x (7–8 and 5–6, respectively). Foraging behaviour of the main insect pollinators (honeybees) and examination of polyads collected from them suggested interspecific and interploidy pollination would occur. There appeared to be no phenophase or flower structure barriers to interploidy pollination.


2018 ◽  
Vol 80 (4) ◽  
pp. 1366 ◽  
Author(s):  
V. Karuppaiah ◽  
P.S. Soumia ◽  
Priyanka D. Wagh

Author(s):  
M. M. Dhore

The present studies on diversity and foraging behaviour of insect pollinators on Murraya koenigii (L. )was carried out during March - April 2019 at Akot town situated in Akola district of Maharashtra. Ten insect species visited Murraya koenigii flowers viz. Five hymenopterans and five lepidopterons. This study revealed that hymenopterans were found to be the most dominant (97. 5%) flower visitors, followed by lepidopteron insects (2. 5%). Among these Apis florea, Apis cerana indica, and Apis dorsata were found to be the most frequent pollinators. The result on foraging behaviour of bees Apis florea started visiting Murrya koenigii flowers in early morning at 06. 00 hrs, Apis cerana indica at 6. 30 hrs and ceased their activity later in the evening. Apis mellifera and Apis dorsata , they started visiting the flowers from 7. 00hrs. Maximum foraging was by Apis florea (12 flowers /minute)followed by Apis cerana indica (10 flowers/minute )and Apis dorsata (9-10 flowers /minute). Time spent per flower was the maximum with lepidopteron (25 sec. /flower) followed by Moth (15 sec. /flower)


2019 ◽  
Vol 3 (6) ◽  
pp. 723-729
Author(s):  
Roslyn Gleadow ◽  
Jim Hanan ◽  
Alan Dorin

Food security and the sustainability of native ecosystems depends on plant-insect interactions in countless ways. Recently reported rapid and immense declines in insect numbers due to climate change, the use of pesticides and herbicides, the introduction of agricultural monocultures, and the destruction of insect native habitat, are all potential contributors to this grave situation. Some researchers are working towards a future where natural insect pollinators might be replaced with free-flying robotic bees, an ecologically problematic proposal. We argue instead that creating environments that are friendly to bees and exploring the use of other species for pollination and bio-control, particularly in non-European countries, are more ecologically sound approaches. The computer simulation of insect-plant interactions is a far more measured application of technology that may assist in managing, or averting, ‘Insect Armageddon' from both practical and ethical viewpoints.


2015 ◽  
Vol 526 ◽  
pp. 227-239 ◽  
Author(s):  
AJ Hoskins ◽  
DP Costa ◽  
KE Wheatley ◽  
JR Gibbens ◽  
JPY Arnould

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