scholarly journals Foraging Behavior of Honeybees (Apis Mellifera L.) and Ground Bumblebees (Bombus Terrestris L.) and its Influence on Seed Yield and Oil Quality of Oil Tree Peony Cultivar ‘Fengdan’ (Paeonia Ostii T. Hong et J. X. Zhang)

2020 ◽  
Vol 64 (1) ◽  
pp. 131-142
Author(s):  
Chunling He ◽  
Kaiyue Zhang ◽  
Dongbo Han ◽  
Shuaibing Wang ◽  
Xiaogai Hou ◽  
...  
Keyword(s):  
Apis Mellifera ◽  
Seed Yield ◽  
Bombus Terrestris ◽  
Oil Quality ◽  
Visit Time ◽  
Tree Peony ◽  
Flower Visit ◽  
Single Flower ◽  
Bumblebee Pollination

AbstractOil peony (Paeonia spp.) is a new type of woody oil crop in China with a large cultivation area. Inadequate pollination is one of the main reasons for low seed yield. A pollination net room was built at an oil tree peony base, the numbers of honeybees (Apis mellifera L.) and ground bumblebees (Bombus terrestris L.) were artificially increased and the foraging behaviors and daily activities of the two bees on the plants were observed. Four different pollination methods (honeybee pollination, ground bumblebee pollination, natural field pollination and pollination without insects) were applied. The visit interval, single-flower visit time, number of single-flower visits, number of flowers visited per minute and number of stigma contacts were compared. Meanwhile, the effects of honeybee and bumblebee pollination on the oil yield and quality of peony seeds were compared. There were noticeable differences in daily activity between honeybees and ground bumblebees. Significant differences in the single-flower visit time, visit interval and visit frequency were also observed; honeybee and ground bumblebee pollination increased the seed yield of oil tree peony by 78.74% and 31.88%, respectively. Therefore, both honeybees and ground bumblebees are effective pollinators of oil tree peony. These results provide a theoretical basis for further utilization of bee resources for oil tree peony pollination.

Sulphur application improves the growth, seed yield and oil quality of canola

2013 ◽  
Vol 35 (10) ◽  
pp. 2999-3006 ◽  
Author(s):  
Hafeez ur Rehman ◽  
Qumer Iqbal ◽  
M. Farooq ◽  
Abdul Wahid ◽  
Irfan Afzal ◽  
...  
Keyword(s):  
Seed Yield ◽  
Oil Quality

Effect of late season insect infestation on yield, yield components and oil quality of Brassica napus, B. rapa, B. juncea and Sinapis alba in the Pacific Northwest region of the United States

1999 ◽  
Vol 132 (3) ◽  
pp. 281-288 ◽  
Author(s):  
J. BROWN ◽  
J. P. McCAFFREY ◽  
B. L. HARMON ◽  
J. B. DAVIS ◽  
A. P. BROWN ◽  
...  
Keyword(s):  
Seed Yield ◽  
Yield Components ◽  
Diamondback Moth ◽  
Oil Quality ◽  
Sinapis Alba ◽  
Yield Reduction ◽  
Insect Infestation ◽  
Late Season ◽  
Cabbage Seedpod Weevil

The effect of late season insect infestation on seed yield, yield components, oil content and oil quality of two canola species (Brassica napus L. and B. rapa L.) and two mustard species (B. juncea L. and Sinapis alba L.) was examined over 2 years. In each year, ten genotypes from each species were evaluated with late season insects controlled with either methyl parathion or endosulfan insecticides, and without insecticides. Major late season insect damage in 1992 was caused by cabbage seedpod weevil (Ceutorhynchus assimilis Paykull), while diamondback moth (Plutella xylostella L.) and aphids (primarily cabbage aphids, Brevicoryne brassicae L.) were major insect pests in 1993. Insecticide application was very effective in controlling diamondback moth larvae and adult cabbage seedpod weevils, but only partially effective in controlling aphids. Higher numbers of diamondback moth larvae were observed on mustard species compared to canola species. S. alba was completely resistant to cabbage seedpod weevil and there was no damage due to this pest observed. Aphid colonization was observed on plants from all species, but infestation on S. alba and B. rapa occurred too late to have a major effect on seed yield. Seed oil content of canola species was significantly reduced by insect damage although oil quality (indicated by fatty acid profile) was not affected by insect attack. Uncontrolled insect infestation reduced seed yield of canola species by 37 and 32% in B. napus and B. rapa, respectively. Least yield reduction occurred in S. alba, where average yield reduction from plants in untreated control plots was <10% of insecticide treated plants. S. alba, therefore, has good potential as an alternative crop suitable for northern Idaho because it can be grown with reduced late season insecticide application.

Seed yield and oil quality of sunflower, safflower, and sesame under different levels of irrigation water availability

2019 ◽  
Vol 218 ◽  
pp. 149-157 ◽  
Author(s):  
Elnaz Ebrahimian ◽  
Seyyed Mohammad Seyyedi ◽  
Ahmad Bybordi ◽  
Christos A. Damalas
Keyword(s):  
Seed Yield ◽  
Water Availability ◽  
Irrigation Water ◽  
Oil Quality ◽  
Different Levels

scholarly journals On-farm evaluation of seed yield and oil quality of linseed (Linum usitatissimum L.) in inland areas of Tuscany, Central Italy

2016 ◽  
Vol 11 (3) ◽  
pp. 199 ◽  
Author(s):  
Luciana G. Angelini ◽  
Silvia Tavarini ◽  
Daniele Antichi ◽  
Lara Foschi ◽  
Marco Mazzoncini
Keyword(s):  
Seed Yield ◽  
Linum Usitatissimum ◽  
Cropping Systems ◽  
Oil Quality ◽  
Economic Value ◽  
Central Italy ◽  
Weather Conditions ◽  
Oil Composition ◽  
Valuable Alternative

Traditional oilseed crops, such as linseed (<em>Linum usitatissimum</em> L.), may represent valuable alternative crops in cropping systems dominated by cereals, due to their adaptability to poor soils and to their high economic value related to the interesting quality of the oil, which is being increasingly appreciated by consumers and industry. The aim of this study was to test the adaptability of linseed to the inland marginal areas of Tuscany, and to explore the levels of crop yield and oil quality which can be achieved in hilly and lowland environments. For three years (2011-2014), experimental open fields (1- 5 ha each) were established and monitored in six commercial farms located in the inland countryside of Pisa province, Tuscany, Central Italy. The effect of environment (hilly and plain areas) was assessed in terms of yield and yield components as well as oil content and composition. Interestingly, seed yield and biomass production were very stable over years in the two areas of cultivation, irrespectively of yearly differences in weather conditions. As expected, higher yields were obtained in plain than in hilly areas. Regarding oil composition, oil extracted from linseed grown in plain environments was richer in linolenic acid, while, oppositely, both oleic and linoleic acids were more abundant in oil from hilly areas. Definitively, our results demonstrated that linseed might be a valuable alternative to cereal crops for marginal lands of Tuscany and, more in general, of Central Italy.

scholarly journals Differences in Pollination Efficiency Among Three Bee Species in a Greenhouse and Their Effects on Yield and Fruit Quality of Northern Highbush ‘Bluecrop’ Blueberry

HortScience ◽  
2021 ◽  
pp. 1-5
Author(s):  
Qi Sun ◽  
Xingnan Zhao ◽  
Lei Wu ◽  
Jimin Zhao ◽  
Yunfei Yang ◽  
...  
Keyword(s):  
Fruit Quality ◽  
Seed Set ◽  
Bombus Terrestris ◽  
Apis Cerana ◽  
Pollen Deposition ◽  
Pollination Efficiency ◽  
Single Flower ◽  
Flower Visiting ◽  
Visiting Time

Different pollinators exhibit different adaptability to plants. Here, we compared the performance in visiting frequency and pollination efficiency among three bee pollinators (Bombus terrestris, Apis cerana, and Apis mellifera) on greenhouse-grown northern highbush ‘Bluecrop’ blueberry plants and evaluate their effects on yield and fruit quality. Our results indicated that the duration of daily flower-visiting of B. terrestris was 24 and 64 minutes longer than that of A. cerana and A. mellifera, respectively, and the visiting time of a single flower for B. terrestris was substantially shorter than the other two bee species, and pollen deposition on the stigma from single visit by B. terrestris was twice and three times that of A. cerana and A. mellifera, respectively. The yield of individual plants pollinated by B. terrestris showed an increase of 11.4% and 20.0% compared with the plants pollinated by A. cerana and A. mellifera, respectively, with the rate of Grade I fruit (>18 mm diameter) reaching 50.8%, compared with 32.9% and 22.5% for A. cerana and A. mellifera groups, respectively. Moreover, the early-to-midseason yield of plants pollinated by B. terrestris was higher, and the ripening time was 3 to 4 days earlier. An artificial pollination experiment demonstrated that seed set of high (≈300), medium (90–110), and low (20–30) pollination amounts were 43.0%, 42.5%, and 10.5%, respectively, and the corresponding mean weights of single fruits (related to the seed number inside) were 2.8, 2.7, and 1.2 g, respectively. The highly efficient pollination of B. terrestris was attributed to its behavior of buzz-pollination. Therefore, it is preferential for pollination of ‘Bluecrop’ blueberry in the greenhouse.

scholarly journals Sulphur doses and application times on yield and oil quality of canola grown in calcareous soil

2020 ◽  
Vol 71 (1) ◽  
pp. 341
Author(s):  
M. Younis ◽  
A. Muhammad ◽  
S. Alam ◽  
A. Jalal
Keyword(s):  
Protein Content ◽  
Seed Yield ◽  
Oil Content ◽  
Block Design ◽  
Oil Quality ◽  
Plot Size ◽  
Randomized Complete Block Design ◽  
Biological Yield ◽  
The University

Pakistan has been constantly deficient in its oil seed production and it is very difficult to meet the edible oil requirement of its ever-increasing population. A field experiment was conducted at the Agronomy Research Farm, The University of Agriculture Peshawar, Northern Pakistan during winter (2013–14). Five sulphur levels (15, 30, 45, 60 and 75 kg·ha-1) and times of application (at seedling, bolting and flowering stages) were used for the canola variety Abasin-95. The experiment was laid out in a randomized complete block design replicated four times on a 5 m × 3.2 m plot size. The results showed that the sulphur-applied plots gave the highest seed yield, biological yield, glucosinolate, erucic acid, oil content, protein content, oleic acid and linoleic acid compared to the control plots. Sulphur applied at the rate of 60 kg·ha-1 and applied at the bolting stage increased seed yield, biological yield, oil content, and protein content.

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