Honeybee pollination of lupins (Lupinus albus cv. Hamburg)

1985 ◽  
Vol 25 (1) ◽  
pp. 220 ◽  
Author(s):  
DF Langridge ◽  
RD Goodman
Keyword(s):  
Apis Mellifera ◽  
Lupinus Albus ◽  
Wind Pollination ◽  
Percentage Germination ◽  
Self Pollination

Mean yields of seed, percentage germination of seed, and mass of 1000 seeds of Lupinus albus cv. Hamburg were significantly greater from plots to which honeybees (Apis mellifera) and larger insects had access than from plots which excluded these insects. Bees collected appreciable quantities of pollen and nectar from the lupin flowers, which enabled them to build up colony populations, store surplus honey and provide some surplus pollen to the beekeeper.No airborne lupin pollen was detected and wind pollination of this species seems to be negligible; but some self-pollination does occur. Bee activity on this species makes bees important agents of pollination of L. albus.

Honeybee pollination of oilseed rape, cultivar Midas

1982 ◽  
Vol 22 (115) ◽  
pp. 124 ◽  
Author(s):  
DF Langridge ◽  
RD Goodman
Keyword(s):  
Brassica Napus ◽  
Oilseed Rape ◽  
Oil Content ◽  
Seed Oil ◽  
Wind Pollination ◽  
Percentage Germination ◽  
Seed Oil Content ◽  
Dry Land ◽  
Self Pollination

In a trial on oilseed rape (Brassica napus) cv. Midas grown on dry land in northern Victoria, no increase in yield of seed, oil content, or percentage germination was obtained from plots where bees and larger insects had access compared with plots enclosed in cages of 2.5 mm mesh to exclude these insects. The weight of 1000 seeds was slightly greater in the enclosed plots. Bees and a Syrphid, Melangyna viridiceps, were the predominant insects visiting the flowers. The bees stored some surplus honey and pollen and built up colony population. Self-pollination and possibly wind pollination appear to be the norm for this cultivar.

scholarly journals Foraging Behavior and Pollination Efficiency of Apis mellifera L. on the Oil Tree Peony ‘Feng Dan’ (Paeonia ostii T. Hong et J.X. Zhang)

Insects ◽  
2019 ◽  
Vol 10 (4) ◽  
pp. 116
Author(s):  
Chunling He ◽  
Kaiyue Zhang ◽  
Xiaogai Hou ◽  
Dongbo Han ◽  
Shuaibing Wang
Keyword(s):  
Apis Mellifera ◽  
Foraging Behavior ◽  
Seed Set ◽  
Wind Pollination ◽  
Tree Peony ◽  
Bee Pollination ◽  
Self Pollination ◽  
Single Flower ◽  
The Relationship ◽  
Control Net

To solve the issue of insufficient pollinating of insects for the oil tree peony ‘Feng Dan’ (Paeonia ostii T. Hong et J.X. Zhang) and improve its seed set and yield, we conducted observations from 2017 to 2018 to investigate the relationship between honey bee (Apis mellifera L.) foraging behavior and diurnal activity. We compared the single-fruit seed set ratio among three flower types on the same plants of the oil tree peony, which flowered simultaneously, in three pollination areas (bee pollination, natural field pollination, and controlled pollination by pollinators) and in a net room under self-pollination, wind pollination and bee pollination. Apis mellifera exhibited short single visitations, long visitations to a single flower and repeated visits to flowers of the oil tree peony. The number of flower visits of A. mellifera was significantly and positively yet weakly correlated with the number of stigma visits (2017: r = 0.045, p < 0.05; 2018: r = 0.195, p < 0.01). The seed set of oil tree peony follicles in the A. mellifera pollination area was significantly higher than that in the natural pollination field area and the control net rooms. On the same oil tree peony plant with synchronous flowering, the percent seed set of follicles pollinated by A. mellifera at a high density was significantly higher than that resulting from wind pollination and self-pollination.

Honeybee pollination of Japanese plums (Prunus salicina Lindl. cv. Satsuma) in the Goulburn Valley, Victoria

1985 ◽  
Vol 25 (1) ◽  
pp. 227 ◽  
Author(s):  
DF Langridge ◽  
RD Goodman
Keyword(s):  
Apis Mellifera ◽  
Wind Pollination ◽  
Native Bees ◽  
Prunus Salicina ◽  
Valley Area ◽  
Insect Visitors

The pollination requirements of Japanese plums (Prunus salicina Lindl. cv. Satsuma) were examined in an orchard in the Goulburn Valley area of Victoria. Trees which were accessible to honeybees (Apis mellifera) had a higher percentage pollination rate (3.2 times) greater weight of fruit (2.6 times) and more fruit (3.3 times) than did the trees that were enclosed to exclude bees and large insects. Honeybees comprised 88.5% of all insect visitors to the flowers. The behaviour patterns of other insects were such that they would effect little or no pollination. Pollen gathering bees are considered the main pollinators of this species because of their activity early in flowering. No native bees (Trigona spp.) were seen to visit the flowers. While parthenocarpy and wind pollination may produce some fruit on Satsuma, the presence of an adequate population of honeybees is necessary to set a satisfactory crop.

Insect visitation rates and foraging patterns differ in androdioecious and hermaphrodite-only populations of Laguncularia racemosa (Combretaceae) in Florida

2012 ◽  
Vol 28 (4) ◽  
pp. 343-351 ◽  
Author(s):  
Carol L. Landry ◽  
Beverly J. Rathcke
Keyword(s):  
Apis Mellifera ◽  
Mathematical Models ◽  
Breeding System ◽  
Laguncularia Racemosa ◽  
Foraging Patterns ◽  
Visitation Rates ◽  
Self Pollination ◽  
Insect Visitation ◽  
Relative Abundances

Abstract:Insect-pollinated Laguncularia racemosa has a variable breeding system; some populations are androdioecious, with male and hermaphroditic plants, while others lack male plants. We observed the foraging behaviours of insects in three androdioecious and three hermaphrodite-only populations of L. racemosa in Florida. In each population, insect visitation rates were estimated from 30–108 timed intervals. We recorded the number of flowers visited by 144–224 insects during foraging bouts made to 15–40 male and hermaphroditic plants. Male plants in androdioecious populations had significantly more visitors than hermaphroditic plants, increasing the number of vectors carrying pollen from male plants. Further, many insects visited few flowers during foraging bouts, which should increase outcrossing frequency. According to mathematical models, male plants benefit from these combined factors. Plants in hermaphrodite-only populations had significantly more visitors than hermaphroditic plants in androdioecious populations. Proportionately more insects visited many flowers during foraging bouts in hermaphrodite-only versus androdioecious populations. The increased likelihood of geitonogamous self-pollination could help explain the lack of male plants in hermaphrodite-only populations. Differences in pollinator assemblages and the relative abundances of several species were responsible for differences in foraging behaviours: Apis mellifera, Bombus sp., Melissodes sp., Xylocopa sp., Euodynerus sp. and a calliphorid species.

scholarly journals Reproductive assurance in three Neotropical species of Podostemaceae: strategies of self-pollination and the first report of apomixis1

Hoehnea ◽  
2020 ◽  
Vol 47 ◽  
Author(s):  
Inara Carolina da Silva-Batista ◽  
Cristiana Koschnitzke ◽  
Claudia Petean Bove
Keyword(s):  
Reproductive Strategies ◽  
Water Environment ◽  
Floral Biology ◽  
Wind Pollination ◽  
Reproductive Assurance ◽  
Running Water ◽  
First Report ◽  
Neotropical Species ◽  
Self Pollination ◽  
Evolutionary Lineages

ABSTRACT (Reproductive assurance in three Neotropical species of Podostemaceae: strategies of self-pollination and the first report of apomixis). The aspects of reproductive assurance of the Lophogyne lacunosa (Gardner) C.P.Bove & C.T.Philbrick, Podostemum weddellianum (Tul.) C.T. Philbrick & Novelo, and Tristicha trifaria (Bory ex Willd.) Spreng. were investigated and, the mechanisms correlated to the flower morphology and floral biology. The mating system of L. lacunosa was also described, as well as the first report of apomixis in Podostemaceae. The reproductive assurance strategies used by L. lacunosa were autonomous competitive self-pollination, wind pollination, and apomixis. This species has floral attributes that ensure the dispersion of pollen by wind and its capture by the stigmas. Podostemum weddellianum and Tristicha trifaria presented autonomous competitive self-pollination before and during anthesis, respectively; both lack floral attributes for wind pollination. Considering that these species can be found in the same running water environment and that they are not phylogenetically close related, it was concluded that the different reproductive strategies are related to their evolutionary lineages.

FURTHER INBREEDING STUDIES WITH DOUGLAS FIR

1957 ◽  
Vol 33 (4) ◽  
pp. 318-332 ◽  
Author(s):  
A. L. Orr-Ewing
Keyword(s):  
Tree Improvement ◽  
Douglas Fir ◽  
Wind Pollination ◽  
Viable Seed ◽  
Practical Applications ◽  
Parent Tree ◽  
Cross Pollination ◽  
Self Pollination ◽  
Improvement Programs ◽  
Forestry Practice

The results from inbreeding studies with the Douglas fir have conclusively shown that the effects of self-pollination vary widely in different trees as the yield of viable seed was sharply reduced in some trees and not in others. The inbred progeny was usually weaker and less vigorous than that resulting from the controlled cross-pollination of the same parent tree. The progeny from wind-pollination, where the pollen parent was not known, varied greatly and some of the seedlings showed all the characteristics of inbreeding. The value of inbreeding to future tree improvement programs and the practical applications of self-pollination to current forestry practice are discussed.

Honeybee pollination of sunflower cultivars Hysun 30 and Sunfola

1981 ◽  
Vol 21 (111) ◽  
pp. 435 ◽  
Author(s):  
DF Langridge ◽  
RD Goodman
Keyword(s):  
Helianthus Annuus ◽  
Oil Content ◽  
Seed Set ◽  
Percentage Germination ◽  
Self Pollination ◽  
Hand Pollination

In trials on an irrigated crop of hybrid sunflowers, (Helianthus annuus), cv. Hysun 30, in northern Victoria, plots where bees had access produced 11 % more seed than plots where bees and larger insects were excluded. Although some seed was set in cages by airborne pollination and self-pollination, honeybees increased seed set significantly. There was a slightly greater oil content in seed from open plots but no difference in weight of 1000 seeds or percentage germination. There was a 20% increase in the percentage of flowers that set seed in the open compared with enclosed plots. There was a 1362% increase in open-pollinated flowers that set seed compared with self-pollinated, but there was no difference between open-pollinated and open-pollinated supplemented by hand-pollination. The yield of seed from open plots of the so-called 'open-pollinated' cv. Sunfola was directly related to the honeybee density on the crop, expressed as ratio of bees to inflorescences. Honeybees were effective cross-pollinators of the sunflowers. Hysun 30 pollen was not attractive to bees and they tended to discard it. Colony strength declined while the bees worked the crop. The data suggest that a rate of one honeybee per plant during anthesis could optimize yields of set seed.

A study on pollination of lupins (Lupinus angustifolius)

1977 ◽  
Vol 17 (85) ◽  
pp. 319 ◽  
Author(s):  
DF Langridge ◽  
RD Goodman
Keyword(s):  
Lupinus Angustifolius ◽  
Wind Pollination ◽  
Economic Factors ◽  
Cross Pollination ◽  
Self Pollination ◽  
The Mean

Mean yields of seed from lupins (Lupinus angustifolius) were significantly greater from plots to which bees and larger insects had access than from plots from which these insects were excluded. There was no difference in the mean germination and weight of 1000 seeds from open and closed plots. Bees collected appreciable quantities of pollen from lupin flowers and the nectar gathered allowed colonies to build up to swarming point and store surplus honey. Wind pollination of lupins seems to be negligible but self-pollination is important. Bee activity on lupins makes them important agents of cross-pollination. Economic factors of seed price and cost of hire of bees are important in determining the feasibility of hiring bees for pollination of lupins.

Cross-pollination benefits differ among oilseed rape varieties

2013 ◽  
Vol 152 (5) ◽  
pp. 770-778 ◽  
Author(s):  
A. HUDEWENZ ◽  
G. PUFAL ◽  
A-L. BÖGEHOLZ ◽  
A-M. KLEIN
Keyword(s):  
Oilseed Rape ◽  
Fruit Set ◽  
Biofuel Production ◽  
Human Consumption ◽  
Wind Pollination ◽  
Research Information ◽  
Cross Pollination ◽  
Crop Varieties ◽  
Self Pollination ◽  
Hand Pollination

SUMMARYWinter oilseed rape (Brassica napus) is an important crop for human consumption and biofuel production and its production is increasing worldwide. It is generally assumed that cross-pollination by insects increases oilseed rape yield but testing of this has been restricted to a few rapeseed varieties and produced varying results. The present study determines whether cross-pollination benefits a number of oilseed rape varieties by comparing yield in the presence and absence of insects. Four rapeseed varieties (Sherlock, Traviata, Treffer and Visby) were used with ten individuals each in four pollination treatments: (1) supplementary hand-pollination, (2) open pollination with insects able to access the flowers, (3) wind pollination and (4) autonomous self-pollination. Across all four varieties, open and supplementary hand-pollination treatments resulted in higher fruit set, numbers of seeds per pod and seed yield compared with wind and self-pollination. The cross-pollination benefits, however, differed among rapeseed varieties: Treffer and Visby had a higher dependence on open (insects) and supplementary cross-pollination than Sherlock and Traviata. Across all four varieties, seed weight compensated for reduced fruit set and was highest when plants were self-pollinated. The present results highlight the importance of considering varietal differences in crop pollination research. Information on the pollination requirements of crop varieties is required by farmers to optimize management decisions in a world of increasing agropollination deficits.

Differentiation Processes of the Ocellar Retina of the Honeybee (Apis Mellifera L.)

1990 ◽  
Vol 48 (3) ◽  
pp. 430-431
Author(s):  
Maria Anna Pabst
Keyword(s):  
Apis Mellifera ◽  
Distal Part ◽  
Cell Layer ◽  
Single Layer ◽  
Photoreceptor Cells ◽  
Distal Segment ◽  
Compound Eyes ◽  
Thin Sections ◽  
Ultrastructural Studies ◽  
Adult Worker

In addition to the compound eyes, honeybees have three dorsal ocelli on the vertex of the head. Each ocellus has about 800 elongated photoreceptor cells. They are paired and the distal segment of each pair bears densely packed microvilli forming together a platelike fused rhabdom. Beneath a common cuticular lens a single layer of corneagenous cells is present.Ultrastructural studies were made of the retina of praepupae, different pupal stages and adult worker bees by thin sections and freeze-etch preparations. In praepupae the ocellar anlage consists of a conical group of epidermal cells that differentiate to photoreceptor cells, glial cells and corneagenous cells. Some photoreceptor cells are already paired and show disarrayed microvilli with circularly ordered filaments inside. In ocelli of 2-day-old pupae, when a retinogenous and a lentinogenous cell layer can be clearly distinguished, cell membranes of the distal part of two photoreceptor cells begin to interdigitate with each other and so start to form the definitive microvilli. At the beginning the microvilli often occupy the whole width of the developing rhabdom (Fig. 1).

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