scholarly journals Insect pollinator dependence of shea (Vitellaria paradoxa C.F. Gaertn.) in the Guinea Savanna zone of Ghana

2019 ◽  
Vol 8 (1) ◽  
Author(s):  
Latif Iddrisu Nasare ◽  
Peter K. Kwapong ◽  
Dzigbodi Adzo Doke
Keyword(s):  
Tree Species ◽  
Fruit Set ◽  
Shea Butter ◽  
Vitellaria Paradoxa ◽  
Insect Pollination ◽  
Monetary Value ◽  
Guinea Savanna ◽  
Insect Pollinator ◽  
Insect Pollinators ◽  
Savanna Zone

AbstractShea (Vitellaria paradoxa C.F. Gaertn.) is a multipurpose tree species indigenous to the Sudano Sahelian zone of Africa and occurs as the most abundant economic tree species in northern Ghana. The edible oil (shea butter) extracted from shea kernel is ranked as the most economic product of the species. Although fruit set and yield of shea are known to be influenced by insect pollination, the actual contribution of insect pollinators to its reproductive success has rarely been studied. This study estimated the percentage insect pollinator dependence and monetary value of insect pollination per bag of shea kernel (85 kg) in the Guinea savanna zone. Open pollination and insect exclusion treatments were applied to the flowers of 18 randomly selected matured shea trees and observed from the onset of flowering to fruit maturity. Proportion of total production value attributed to insect pollination approach was used in estimating the monetary value of pollination per bag of shea kernel with the average market price as proxy. The study revealed an insect pollinator dependence of 77% and 73% for fruit set and dry kernel yield, respectively. Mean number of fruit set per inflorescence varied significantly between insect-excluded and open-pollinated inflorescences (p < 0.05). The monetary value of insect pollination was estimated at GH₵ 73.21 (US$ 18.67) per bag of kernel as of August 2016. Shea is a high insect pollinator–dependent species and the conservation of insect pollinators would be critical to the sustainability of yield.

scholarly journals Correction to: Insect pollinator dependence of shea (Vitellaria paradoxa C.F. Gaertn.) in the Guinea Savanna zone of Ghana

2020 ◽  
Vol 9 (1) ◽  
Author(s):  
Latif Iddrisu Nasare ◽  
Peter K. Kwapong ◽  
Dzigbodi Adzo Doke
Keyword(s):  
Original Publication ◽  
Vitellaria Paradoxa ◽  
Guinea Savanna ◽  
Insect Pollinator ◽  
Savanna Zone

In the original publication of this article (Nasare et al. 2019), the ‘₵’ in Ghanaian currency symbol (GH₵) was omitted in below content in the pdf version of the article. It should be ‘GH₵’.

scholarly journals The effect of the limitation of insect pollination period on the fruit set and yield of quince cultivars (Cydonia oblonga Mill.)

2000 ◽  
Vol 6 (3) ◽  
Author(s):  
P. Benedek ◽  
T. Szabó ◽  
J. Nyéki
Keyword(s):  
Tree Species ◽  
Fruit Set ◽  
Fruit Tree ◽  
Temperate Zone ◽  
Bee Pollination ◽  
Cydonia Oblonga ◽  
Insect Pollination ◽  
The Mean

The effect of the partial and/or complete limitation of the insect (bee) pollination period was studied in three consecutive years at 6 quince cultivars. Quince is greatly sensitive to the limitation. Complete limitation of insect pollination resulted in no yield and also a partial limitation of the insect pollination period (exclusion of the bees at the first or at the second half of the blooming) depressed the final set and the yield by 60-70% at least or more, sometimes down to no yield. No real correlation was found between the mean mass of fruits and the fruit set. The mass of fruit seems to be rather a character of the cultivars. A loose but significant correlation was established between the intensity of honeybee visitation and the consequent yield of quince. As much as some 4-5 and 8-10 honeybee visits are needed a day on one flower to achieve the required optimal fruit set that has been declared to be 20-25% for quince in the literature. These are extremely high bee visitation figures, accordingly, no doubt the commercial quince plantations require much higher number of honeybee colonies than other temperate zone fruit tree species to supplementary pollination  

Bees are supplementary pollinators of self-compatible chiropterophilous durian

2018 ◽  
Vol 34 (1) ◽  
pp. 41-52 ◽  
Author(s):  
Kanuengnit Wayo ◽  
Chama Phankaew ◽  
Alyssa B. Stewart ◽  
Sara Bumrungsri
Keyword(s):  
Plant Species ◽  
Fruit Set ◽  
Floral Biology ◽  
Apis Dorsata ◽  
Open Pollination ◽  
Insect Pollination ◽  
Insect Pollinator ◽  
Southern Thailand ◽  
Floral Visitors

Abstract:Nocturnally foraging insects may be supplementary pollinators to chiropterophilous plant species when bats are scarce. Given that insects are much smaller than bats, they may be more effective at transferring pollen for plant species with similar stamen and pistil lengths, such as the ‘Monthong’ durian cultivar. The present study clarifies the role of insects in pollinating the ‘Monthong’ cultivar by examining the floral biology, conducting pollination treatments on 19 trees and observing floral visitors in southern Thailand. Stigmas were receptive by 17h00, and over 50% of ‘Monthong’ anthers had dehisced by 17h30. Several bee species began foraging on flowers during the late afternoon, and the giant honey bee (Apis dorsata) continued to visit throughout the night. Our results show that at 4 wk after pollination, the highest fruit set occurred from hand-crossed pollination (13.5%), followed by open pollination (5.5%), insect pollination (3.3%) and automatic autogamy (2.0%), indicating that this cultivar is highly self-incompatible. Moreover, insects appear to be important pollinators of ‘Monthong’ durian in areas where nectar bats visit infrequently. One bee species in particular,Apis dorsata, commonly foraged on flowers at dusk and appears to be the most effective insect pollinator of durian. Our findings highlight that nocturnally foraging bees are capable of securing pollination for night-blooming plant taxa, even those typically considered to be bat-pollinated.

scholarly journals Diversity and abundance of tree species of a protected woodland, southern guinea savanna zone, Nigeria

2021 ◽  
Author(s):  
Oluwafemi ADENIJI ◽  
Eric İRUNOKHAİ ◽  
Joseph ADİGUN ◽  
Sunday OLORUNFEMİ
Keyword(s):  
Tree Species ◽  
Guinea Savanna ◽  
Savanna Zone

Odonata from the Guinea Savanna Zone in Ghana

2009 ◽  
Vol 183 (2) ◽  
pp. 177-187 ◽  
Author(s):  
Adrian G. Marshall ◽  
R. Moylan Gambles
Keyword(s):  
Guinea Savanna ◽  
Savanna Zone

FERTILITY COMPONENTS IN A FABA BEAN LINE NEAR-ISOGENIC FOR MALE STERILITY

1986 ◽  
Vol 66 (2) ◽  
pp. 235-239 ◽  
Author(s):  
G. DUC ◽  
G. G. ROWLAND ◽  
J. PICARD
Keyword(s):  
Male Sterility ◽  
Vicia Faba ◽  
Seed Yield ◽  
Faba Bean ◽  
Yield Components ◽  
Male Sterile ◽  
Potential Yield ◽  
Insect Pollinator ◽  
Insect Pollinators ◽  
Vicia Faba L

A near-isogenic faba bean (Vicia faba L.) line, segregating in a 1:1 ratio of male-fertile to male-sterile plants, was used to study the importance of insect pollinators on ovule fertilization and yield components of the first five flowering nodes. The fertilization of ovules from open-pollinated plants at the higher insect pollinator site of Dijon, France was 83%, as compared with 50% at the lower insect pollinator activity site of Saskatoon, Canada. No significant differences in total fertilized ovules were found between male-fertile and male-sterile plants at Dijon, but male-fertile plants at Saskatoon had significantly more fertilized ovules than male-sterile plants. Seed production on the first five flowering nodes was significantly greater at Saskatoon. Thus, while insect pollinators are important in determining the potential yield of a faba bean plant, other factors, such as environment, determine the ultimate yield.Key words: Vicia faba, ovule fertilization, seed yield, faba bean, male sterility

scholarly journals Insect pollination improves yield of Shea(Vitellaria paradoxa subsp. paradoxa) in the agroforestry parklands of West Africa

2018 ◽  
Vol 22 ◽  
pp. 11-20 ◽  
Author(s):  
Jane Stout ◽  
Issa Nombre ◽  
Bernd de Bruijn ◽  
Aoife Delaney ◽  
Dzigbodi Adzo Doke ◽  
...  
Keyword(s):  
West Africa ◽  
Vitellaria Paradoxa ◽  
Insect Pollination ◽  
Agroforestry Parklands
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