Comparative Evaluation of Eurytoma schreineri Schr. Attack Frequency on Transgenic and Two Conventional Plum Varieties

The plum seed wasp (Eurytoma schreineri Schr.) is a polyphagous pest that can cause significant damages to the plum crop. A transgenic plum variety, resistant to Plum pox virus, was evaluated to the attack frequency of E. schreineri in the context of reduced number of insecticide treatments against aphids, in comparison with two conventional plum varieties. The most affected variety by plum seed wasp, for two consecutive years, was ‘Stanley’, followed by ‘Reine Claude d’Althan’, and then ‘HoneySweet’ transgenic plum. The differences between variants were statistically assured.

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Experiments on resistance of plum varieties and hybrids to plum pox virus in Moldavia

Archives of Phytopathology and Plant Protection ◽

10.1080/03235408709437750 ◽

1987 ◽

Vol 23 (6) ◽

pp. 443-449 ◽

Cited By ~ 6

Author(s):

Tatjana F. Bivol ◽

Vavara F. Ignat ◽

Elena A. Kukurusak ◽

Hartmut Kegler

Keyword(s):

Plum Pox Virus ◽

Plum Varieties

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А comprehensive assessment of the most promising varieties and forms of plum breeding in I. V. Michurin federal scientific center

POMICULTURE & SMALL FRUITS CULTURE IN RUSSIA ◽

10.31676/2073-4948-2020-61-9-15 ◽

2020 ◽

Vol 61 ◽

pp. 9-15

Author(s):

R. Ye. Bogdanov

Keyword(s):

Fruit Weight ◽

Comprehensive Assessment ◽

Fungal Diseases ◽

Scientific Center ◽

Plum Variety ◽

Artificial Freezing ◽

Plum Varieties ◽

Moderate Resistance ◽

And Control ◽

The City

The purpose of the research was a comprehensive assessment of plum varieties and forms and revealing the most promising for commercial use. Plantations laid in the city of Michurinsk, Tambov region. The assessment of plum plants for frost resistance was carried out in the middle of winter (II component). The artificial freezing of l year old shoots was made in January during 12 hours at -38 °C. The least subfreezing of the wood (2.8 and 2.9) was observed in elite form 22-29 and control variety “Etyud”, respectively. The moderate resistance of tissues (the degree of injury not over 3) was observed in “Vengerka Kursakova” variety and elite form 29- 136. The subfreezing level of vegetative buds in all studied varieties and elite forms did not exceed 2.5. The freezing at -38°C causes complete death of generative organs in all accessions. On the background of mass development of fungal diseases during the growing season 2016 because of high humidity and a deficit of positive temperatures and on the base of visual registration in field – the high resistant forms to Clasterosporium (“Vengerka Kursakova”) and to Monilia (22-29) were singled out. The intensity of fungal diseases in given accessions did not exceed 2 points. The highest productivity (7.43 t/ha) averagely during the years of investigations was found in “Vengerka Kursakova” variety and the data exceeded substantially the control one. The highest fruit weight occurred to be in “Radost” and “Artistichnaya” varieties with 40.3 and 40.8 g respectively and maximum values 51.7-52.3 g. The large-fruited group included the varieties “Etyud”, “Vengerka Kursakova” and elite form 29-136 where the maximum weight varied from 38.1 to 41.6 g. The varieties “Vengerka Kursakova”, “Dubravnaya”, “Artistichnaya” distinguished by sweet and sour fruit taste (tasting, assessment 4.4) and high commodity-consumer qualities of fruits. A promising plum variety “Vengerka Kursakova”, for use in industrial plantations of the Central Black Earth Region, was identified.

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The parameters of homemade jams after storage

Acta Agraria Debreceniensis ◽

10.34101/actaagrar/56/1930 ◽

2014 ◽

pp. 39-42

Author(s):

Gerda Diósi ◽

Péter Sipos

Keyword(s):

Nutritional Value ◽

Quality Parameters ◽

Matter Content ◽

Dry Matter Content ◽

Chemical Parameters ◽

Added Sugar ◽

Market Positioning ◽

Specific Product ◽

Plum Variety ◽

Plum Varieties

Nowadays producing jams is considered a traditional way of plum processing in Hungary. Plum jams without added sugar can be stored This research aimed to analytically determine which quality parameters of the jams and to what extent they change during storage. Furthermore, this study intended to find out whether a concious consumer can presume any difference between varieties or the year of harvest, or wheather a one-time customer should suspect differences in quality parameters of the different products. This study focused on those differences or alterations in the parameters that occur in the jams made from several different plum varieties produced in different years. I analyzed the classic chemical parameters (dry matter content and ash content) and physiologically important nutritional components (phenolic and flavonoids antioxidants and vitamin C). In this research I used jams which were produced from 6 varieties grown in 2009 (President, Tophit, Bluefre, Elena, Presenta, Stanley), 4 varieties from 2010 (President, Bluefre, Elena, Presenta) and 6 varieties from 2011 (President, Tophit, Bluefre, Elena, Presenta, Stanley). Jams were produced with traditional technology in cauldrons without added sugar. Jars were placed into a relatively dark and cool place and were stored there until the analysis. Having regard to the results, when consumers choose between the different products they also choose quality since the processed plum variety, and the year of production/processing determine the nutritional value of the specific product. This could be used for market positioning and promotion of the product, however further research is needed to gain more information from the differences that derive from the varieties, year of harvest or other factors. This way fruit and jam producers could turn these informations into market advantage.

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Plum pox virus strains: Diversity and geographical distribution in Serbia

Pesticidi i fitomedicina ◽

10.2298/pif1402097j ◽

2014 ◽

Vol 29 (2) ◽

pp. 97-107 ◽

Cited By ~ 4

Author(s):

Darko Jevremovic ◽

Svetlana Paunovic

Keyword(s):

Total Yield ◽

Economic Losses ◽

Plum Pox Virus ◽

Minor Importance ◽

Comprehensive Overview ◽

Host Preferences ◽

Fruit Drop ◽

Plum Varieties ◽

Virus Strains ◽

Virus Variability

Plum pox virus (PPV) is the causal agent of Sharka disease. Since its discovery, Sharka has been considered as a calamity in plum orchards. PPV is present worldwide in many Prunus species, causing great economic losses. In highly susceptible plum varieties, such as Pozegaca, PPV causes a premature fruit drop and reduces fruit quality, which leads to total yield loss. Eight PPV strains (PPV-M, PPV-D, PPV-EA, PPV-C, PPV-Rec, PPV-W, PPV-T and PPVCR) have been recognized so far. Three major strains (PPV-M, PPV-D and PPV-Rec) are the most widely dispersed and occur frequently in many European countries. Other strains are of minor importance due to their limited host preferences or geographic distribution. So far, all three major strains have been identified in Serbia. In this paper, we provide a comprehensive overview of the research into Plum pox virus variability in Serbia.

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Comparison of In-the-Ear and Over-the-Ear Hearing Aid Fittings

Journal of Speech and Hearing Disorders ◽

10.1044/jshd.5104.362 ◽

1986 ◽

Vol 51 (4) ◽

pp. 362-369 ◽

Cited By ~ 4

Author(s):

Donna M. Risberg ◽

Robyn M. Cox

Keyword(s):

Hearing Aids ◽

High Frequency ◽

Comparative Evaluation ◽

Speech Intelligibility ◽

Hearing Aid ◽

Hearing Aid Fitting ◽

The Difference ◽

Functional Gain ◽

The Relationship

A custom in-the-ear (ITE) hearing aid fitting was compared to two over-the-ear (OTE) hearing aid fittings for each of 9 subjects with mild to moderately severe hearing losses. Speech intelligibility via the three instruments was compared using the Speech Intelligibility Rating (SIR) test. The relationship between functional gain and coupler gain was compared for the ITE and the higher rated OTE instruments. The difference in input received at the microphone locations of the two types of hearing aids was measured for 10 different subjects and compared to the functional gain data. It was concluded that (a) for persons with mild to moderately severe hearing losses, appropriately adjusted custom ITE fittings typically yield speech intelligibility that is equal to the better OTE fitting identified in a comparative evaluation; and (b) gain prescriptions for ITE hearing aids should be adjusted to account for the high-frequency emphasis associated with in-the-concha microphone placement.

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