scholarly journals The Effect of Olive Fruit Fly Bactrocera oleae (Rossi) Infestation on Certain Chemical Parameters of Produced Olive Oils

Molecules ◽  
2020 ◽  
Vol 26 (1) ◽  
pp. 95
Author(s):  
Vasilij Valenčič ◽  
Bojan Butinar ◽  
Maja Podgornik ◽  
Milena Bučar-Miklavčič
Keyword(s):  
Fatty Acids ◽  
Gas Chromatography ◽  
Fruit Fly ◽  
Bactrocera Oleae ◽  
Olive Fruit Fly ◽  
Chemical Parameters ◽  
Olive Fruit ◽  
Chromatography Analysis ◽  
Olive Oils ◽  
Gas Chromatography Analysis

Olives affected by active and damaging infestation (olive fruit fly Bactrocera oleae (Rossi)) were assayed for their chemical composition. Biophenols were determined by HPLC, sterols, triterpenic dialcohols, and fatty acids by gas chromatography analysis. The acquired data were statistically analyzed. Oils produced from “Istrska belica” fruit affected by active infestation compared to the oils made from fruit affected by damaging infestation showed higher amounts of total oleuropein biofenols (377.3 versus (vs.) 106.6 mg/kg), total biophenols (755 vs. 377 mg/kg), lignans (85.3 vs. 32.9 mg/kg), the dialdehydic form of decarboxymethyl oleuropein aglycone (DMO-Agl-dA) (148.3 vs. 49.0 mg/kg), its oxidized form (DMO-Agl-dA)ox (35.2 vs. 8.5 mg/kg), the dialdehydic form of oleuropein aglycone (O-Agl-dA) (61.1 vs. 8.0 mg/kg), the dialdehydic form of ligstroside aglycone (L-Agl-dA) (63.5 vs. 28.0 mg/kg), the aldehydic form of oleuropein aglycone (O-Agl-A) (40.6 vs. 8.4 mg/kg), and lower amounts of tyrosol (Tyr) (6.0 vs. 13. 9 mg/kg) and the aldehydic form of ligstroside aglycone (L-Agl-A) (13.8 vs. 40.3 mg/kg). Higher values of stigmasterol (2.99%) and lower values of campesterol (2.25%) were determined in oils affected by damaging infestation; an increase in triterpenic dialcohols was also observed (3.04% for damaging and 1.62% for active infestation). Oils affected by damaging infestation, compared to active infestation, showed lower amounts of oleic acid (73.89 vs. 75.15%) and higher amounts of myristic (0.013 vs. 0.011%), linoleic (7.27 vs. 6.48%), and linolenic (0.74 vs. 0.61%) acids.

The effect of the olive fruit fly (Bactrocera oleae) on quality parameters, and antioxidant and antibacterial activities of olive oil

2016 ◽  
Vol 7 (6) ◽  
pp. 2780-2788 ◽  
Author(s):  
Lynda Medjkouh ◽  
Abderezak Tamendjari ◽  
Sonia Keciri ◽  
Joana Santos ◽  
M. Antónia Nunes ◽  
...  
Keyword(s):  
Olive Oil ◽  
Health Effects ◽  
Fruit Fly ◽  
Antibacterial Activities ◽  
Quality Parameters ◽  
Bactrocera Oleae ◽  
Olive Fruit Fly ◽  
Olive Fruit ◽  
Olive Oils

This study shows the importance of controlling the fly attack because it causes a decrease in the beneficial health effects of olive oils.

Diversity of Root Bacteria from Peanut Cropping Systems

2004 ◽  
Vol 31 (2) ◽  
pp. 86-91 ◽  
Author(s):  
D. T. Gooden ◽  
H. D. Skipper ◽  
J. H. Kim ◽  
K. Xiong
Keyword(s):  
Fatty Acids ◽  
Biological Control ◽  
Gas Chromatography ◽  
Cropping Systems ◽  
Cropping System ◽  
Critical Research ◽  
Chromatography Analysis ◽  
Rotation System ◽  
Gas Chromatography Analysis ◽  
Peanut Production

Abstract Rhizobacteria play an important role in sustainable agriculture via plant growth and biological control of pests in a number of ecosystems. Understanding the interactions of crop rotation and rhizobacteria on peanut production is a critical research need. Development of a database on the rhizobacteria obtained from continuous and rotational fields of peanut was initiated in 1997 and terminated in 2000. Peanut was planted in monoculture for 4 yr. In rotational plots, peanut, cotton, corn, and peanut were planted in sequence. Rhizobacteria were isolated from the roots of crop plants grown in a Norfolk soil near Florence, SC. These isolates were identified by composition of fatty acids from gas chromatography analysis (GC/FAME). Arthrobacter and Bacillus were the major genera from non-rhizosphere soils. At initiation of this study in July 1997, the plots selected for continuous peanut had more diversity in rhizobacteria than those plots selected for rotation. In July 2000, rhizobacteria diversity was greater from peanut roots in the rotation cropping system than continuous peanut. Even though rhizobacteria diversity was greater in the rotation system, higher peanut yields were recorded in the continuous peanut system in 2000. Burkholderia spp. were always isolated from the peanut and other crop rhizospheres at each sampling date.

Choice response of the olive fruit fly, Bactrocera oleae, to various bait/insecticide combinations: hydrolyzed proteins or ammonium salts?

2021 ◽  
pp. 1-12
Author(s):  
Kiki Varikou ◽  
Antonis Nikolakakis ◽  
Dimitris Bitsakis ◽  
Zacharias Skarakis ◽  
Nikos Garantonakis ◽  
...  
Keyword(s):  
Fruit Fly ◽  
Ammonium Salts ◽  
Bactrocera Oleae ◽  
Choice Response ◽  
Olive Fruit Fly ◽  
Olive Fruit

scholarly journals Population dynamics of pre-imaginal stages of olive fruit fly Bactrocera oleae Gmel. (Diptera, Tephritidae) in the region of Bar (Montenegro)

2013 ◽  
Vol 28 (1) ◽  
pp. 23-29 ◽  
Author(s):  
Tatjana Perovic ◽  
Snjezana Hrncic
Keyword(s):  
Population Dynamics ◽  
Developmental Stages ◽  
Fruit Fly ◽  
Bactrocera Oleae ◽  
Yield Reduction ◽  
Olive Fruit Fly ◽  
Application Timing ◽  
Olive Fruit ◽  
Fruit Drop

Olive fruit fly is the most harmful pest of olive fruits and important for oil production. Damage involves yield reduction as a consequence of premature fruit drop, but also a reduced quality of olive oil and olive products. There is little available data regarding the biology of Bactrocera oleae in Montenegro. Knowledge of the pest life cycle and development would improve optimization of insecticide application timing and protection of fruits, and reduce adverse effects on the environment. Investigation was conducted on the Zutica variety in an olive grove located in Bar during a three-year period. Population dynamics of the pre-imaginal stages and level of fruit infestation were monitored from mid-July until the end of October. The results of this three-year investigation showed that the beginning of infestation was always at the end of July. It was also found that, depending on environmental conditions, the level of infestation was low until the end of August. In September and October it multiplied, and reached maximum by the end of October. Regarding infestation structure, eggs and first instar larvae were the dominant developmental stages of the pest until the middle of September. From mid-September until mid-October all developmental stages (eggs, larvae, pupae) were equally present in infested fruits. Pupae, cocoons and abandoned galleries prevailed until the harvest.

scholarly journals Olive Fruit Fly, Bactrocera oleae (Gmelin) (Insecta: Diptera: Tephritidae)

EDIS ◽  
1969 ◽  
Vol 2002 (8) ◽  
Author(s):  
Howard V. Weems ◽  
James L. Nation
Keyword(s):  
Cooperative Extension ◽  
Fruit Fly ◽  
Cooperative Extension Service ◽  
Bactrocera Oleae ◽  
Extension Service ◽  
Olive Fruit Fly ◽  
University Of Florida ◽  
Olive Fruit ◽  
Agricultural Sciences

This document is EENY-113 (originally published as DPI Entomology Circular No. 44), one of a series of Featured Creatures from the Entomology and Nematology Department, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida. Published: September 1999. Revised: June 2003.

Sign in / Sign up

Export Citation Format

Share Document