Strawberry Cultivar Performance and Susceptibility to Tarnished Plant Bug Injury

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 460d-460
Author(s):  
D.T. Handley ◽  
M.A. Schupp ◽  
J.F. Dill
Keyword(s):  
Lower Order ◽  
Tarnished Plant Bug ◽  
Strawberry Cultivar ◽  
Marketable Fruit ◽  
Feeding Pressure ◽  
High Yields ◽  
Insecticide Sprays ◽  
Strawberry Cultivars

Twelve strawberry cultivars established in matted row plots in 1993 were treated with insecticides for tarnished plant bug or left untreated for the 1994, 1995, and 1996 seasons. `Honeoye', `Cavendish', and `Oka' had the highest yields of marketable fruit. `Jewel', `Chambly', and `Kent' had lower, but acceptable, yields. `Lateglow', `Blomidon', `Seneca, NY1424', `Settler', and `Governor Simcoe' had lower yields than other varieties. Tarnished plant bug populations were very low during the 1994 and 1996 seasons, and thus feeding pressure may have been too low for any differences in susceptibility between varieties to be expressed. In 1995, when tarnished plant bug feeding pressure was greatest, `Oka', `Cavendish', and `Honeoye' had the lowest injury levels. `Kent' and `Lateglow' had the highest levels of injury. Insecticide sprays significantly reduced the percent of injured fruit for most cultivars, but did not significantly increase the weight of marketable fruit harvested. This is due to injury being most prevalent on lower order, and thus smaller, fruit. Cultivars that produced high yields, had low injury levels, and had the least difference between sprayed and unsprayed treatments are most likely to have resistance to tarnished plant bug injury. `Oka', `Cavendish', and `Honeoye' were the most promising cultivars in this regard.

scholarly journals STRAWBERRY VARIETY YIELDS AND SUSCEPTIBILITY TO TARNISHED PLANT BUG AND STRAWBERRY BUD WEEVIL

HortScience ◽  
1995 ◽  
Vol 30 (2) ◽  
pp. 191c-191
Author(s):  
D.T. Handley ◽  
M.A. Schupp
Keyword(s):  
The Other ◽  
Flower Buds ◽  
Tarnished Plant Bug ◽  
Marketable Fruit ◽  
Feeding Pressure ◽  
High Yields ◽  
Insecticide Sprays

Twelve strawberry varieties established in matted row plots in 1993 were treated with insecticides for tarnished plant bug and strawberry bud weevil or left untreated during 1994. Honeoye and Cavendish had the highest yields of marketable fruit. Oka, Jewel, Chambly, and Kent also had relatively high yields. Lateglow, Blomidon, Seneca, NY 1424, Settler, and Governor Simcoe had lower yields than the other varieties. Tarnished plant bug populations were very small during the 1994 season and the injury levels observed were relatively low. Feeding pressure on the plants may have been too low for all differences in susceptibility between varieties to be expressed. Governor Simcoe, Cavendish, and Oka had the lowest injury levels. Kent, Lateglow, and Seneca had the highest levels of injury. Insecticide sprays significantly reduced injury for all varieties except Cavendish and Governor Simcoe. The number of flower buds killed by strawberry bud weevil differed very little between varieties and spray treatments. No obvious differences in susceptibility to this injury were observed in this trial.

scholarly journals CHROMOSOME NUMBER AND TIME PERIOD OF MITOTIC CYCLE OF FESTIVAL AND CALIFORNICA STRAWBERRY CULTIVARS (Fragaria x ananassa AND Fragaria vesca)

2015 ◽  
Vol 2 (1) ◽  
pp. 476
Author(s):  
Ganies Riza Aristya ◽  
Rezika Alyza ◽  
Rosyidatul Khoiroh ◽  
Budi Setiadi Daryono
Keyword(s):  
Chromosome Number ◽  
Reverse Genetics ◽  
Fragaria X Ananassa ◽  
Fragaria Vesca ◽  
Time Period ◽  
Genomics Research ◽  
Strawberry Cultivar ◽  
Pre Treatment ◽  
Seed Propagation ◽  
Strawberry Cultivars

<p>The cultivated strawberries, Fragaria x ananassa and Fragaria vesca, are the most economically-important softfruit species. F x ananassa and F vesca, both diploid (2n=2x=14) relatives of the commercial octoploid strawberry, are an attractive model for functional genomics research in Rosaceae. Its small genome size, short reproductive cycle, and facile vegetative and seed propagation make F. x annassa and F.vesca a promising candidates for forward and reverse genetics experiments. In order to determine their genetic differences in more detail, chromosome characterization of the two strawberry cultivars was investigated. A method used for chromosome slides in this research was a squash method with modification in pre-treatment. The result showed Fragaria x ananassa had (2n = 4x = 28) chromosome number is 28 and Fragaria vesca had (2n = 2x = 14) chromosome number is 14. The time of mitotic that both strawberry cultivars was similar at 7 to 8.30 am. In addition, mixoploid cells were found in both strawberry cultivar indicating that these cultivars had been treated by mutagenic agents for a breeding program.</p><p><br /><strong>Keywords</strong> : Fragaria, chromosome, mitotic</p>

scholarly journals Evaluation of Current Tarnished Plant Bug (Hemiptera: Miridae) Thresholds in Transgenic MON 88702 Cotton Expressing the Bt Cry51Aa2.834_16 Trait

2020 ◽  
Vol 113 (4) ◽  
pp. 1816-1822
Author(s):  
J C Corbin ◽  
T B Towles ◽  
W D Crow ◽  
A L Catchot ◽  
D R Cook ◽  
...  
Keyword(s):  
Southern United States ◽  
Lygus Lineolaris ◽  
Tarnished Plant Bug ◽  
Current Action ◽  
Action Threshold ◽  
Important Pest ◽  
Current Threshold ◽  
Action Thresholds ◽  
Insecticide Sprays ◽  
Recommended Action

Abstract The tarnished plant bug, Lygus lineolaris (Palisot de Beauvois), is an important pest of cotton in many areas of the southern United States. An experiment was conducted at two locations in Mississippi during 2016 and 2017 to evaluate action thresholds for tarnished plant bug on a novel Bacillus thuringiensis cotton that expresses the Cry51Aa2.834_16 toxin. Treatments included the current action threshold, a 2× threshold, and treatments where insecticides were only applied during the early season (preflower) or only during late season (during flowering) based on the current action thresholds. These were compared to an untreated control and a weekly insecticide use regime that received weekly insecticide sprays. All treatments were imposed on both Bt Cry1Aa2.834_16 cotton and a nontraited cotton. The Bt Cry1Aa2.834_16 trait reduced the number of tarnished plant bugs and injury, and improved yields compared to nontraited cotton. For all spray treatments except the weekly insecticide use regime, yields were greater for the Bt Cry51Aa2.834_16 cotton than the nontraited cotton. In terms of thresholds, Bt Cry1Aa2.834_16 cotton sprayed based on current action thresholds resulted in similar yields to the weekly insecticide use regime of both cotton types. In contrast, the 2× threshold resulted in lower yields than the current threshold for both cotton types. Though thresholds intermediate to the currently recommended action threshold and the 2× threshold were not tested, these data suggest that currently recommended action thresholds appear appropriate for Bt Cry51Aa2.834_16 cotton. These results suggest that this trait will be an important component of current IPM programs in cotton where tarnished plant bug is an important pest.

scholarly journals Mechanical Harvesting and Dehulling of Six Strawberry Cultivars after Four Hand-pickings

HortScience ◽  
1995 ◽  
Vol 30 (2) ◽  
pp. 234-235 ◽  
Author(s):  
Shahrokh Khanizadeh ◽  
Michel J. Lareau ◽  
Deborah Buszard
Keyword(s):  
Marketable Fruit ◽  
Strawberry Cultivars

An experiment was conducted to evaluate the mechanical harvesting and processing suitability of four standard strawberry [Fragaria ×ananassa (Duch.)] cultivars (`Kent', `Glooscap', `Bounty', and `Midway') and the recent introductions `Chambly' and `Oka'. `Kent', `Glooscap', `Oka', and `Chambly' had the highest yields and heaviest fruit. Similar percentages of berries of all cultivars were destroyed by the harvester. `Oka' and `Midway' were not suitable for this type of mechanical harvesting due to their susceptibility to bruising during harvest. Based on total marketable fruit harvested mechanically, `Chambly' was the most and `Oka' was the least adapted cultivars for this particular harvester. `Chambly' and `Glooscap' were easiest to decap, followed by `Bounty', `Oka', and `Midway'. None of the cultivars tested were suited ideally for machine harvesting, and further breeding is required to produce well-adapted cultivars.

scholarly journals Strawberry Cultivar Injury After Two Contrasting Minnesota Winters

2009 ◽  
Vol 19 (4) ◽  
pp. 803-808 ◽  
Author(s):  
Shengrui Yao ◽  
James J. Luby ◽  
David K. Wildung
Keyword(s):  
Snow Cover ◽  
Weather Conditions ◽  
Winter Hardiness ◽  
Severe Winter ◽  
Straw Mulch ◽  
Grand Rapids ◽  
Soil Temperatures ◽  
Strawberry Cultivar ◽  
Plant Stand ◽  
Strawberry Cultivars

As part of our hardy strawberry (Fragaria ×ananassa) breeding program, winter hardiness of 15 strawberry cultivars was evaluated in the field after Winter 2005–2006 and a test Winter 2006–2007 with no snow cover at Grand Rapids, MN. After the snow-covered Winter 2005–2006, plant stand (percent leaf coverage for the designated area for each plot) increased for all cultivars in the mulched treatment and some cultivars in the unmulched treatment with slight decreases only for several cultivars in the unmulched treatment. However, after Winter 2006–2007, the plant stands of all cultivars drastically decreased in both mulched and unmulched treatments. ‘Clancy’, ‘Evangeline’, and ‘L'Amour’ were the three most sensitive cultivars among the 15 cultivars tested. ‘Kent’, ‘Mesabi™’, ‘Cavendish’, and ‘Brunswick’ were the highest yielding cultivars for both 2006 and 2007 in the mulched treatment. In the unmulched treatment, ‘Brunswick’, ‘Mesabi™ ’, ‘Cavendish’, ‘Sable’, and ‘Kent’ were the top yielding cultivars after Winter 2006–2007. During Winter 2005–2006, with 20 to 30 cm snow cover throughout the season, the 5- and 10-cm soil temperatures remained constant at ≈30 to 31.5 °F in both mulched and unmulched treatments. In contrast, during Winter 2006–2007, there were 16 and 24 days (consecutive) in February below 18 °F at 5-cm soil depths for mulched and unmulched treatments, respectively, which probably led to the severe winter damage. Although straw mulch afforded the plants some protection, snow cover is critical to the survival of strawberries in northern Minnesota and other areas with similar weather conditions.

scholarly journals Temporal expression of a PGIP-gene in strawberry cultivars induced by wounding or by Botrytis cinerea infection

2017 ◽  
Vol 38 (SI 2 - 6th Conf EFPP 2002) ◽  
pp. 504-506 ◽  
Author(s):  
L. Mehli
Keyword(s):  
Botrytis Cinerea ◽  
Developmental Regulation ◽  
Constitutive Expression ◽  
Comparative Experiment ◽  
Inhibitor Protein ◽  
Temporal Expression ◽  
Rt Pcr ◽  
Strawberry Cultivar ◽  
Strawberry Cultivars ◽  
Pgip Gene

The expression of a PGIP gene (polygalacturonase inhibitor protein) was monitored with semi-quantitative (SQ)-RT-PCR in green, white and red berries of the strawberry cultivar Korona upon infection with Botrytis cinerea and wounding. In addition, the PGIP expression in infected white berries was quantified in four additional cultivars. The constitutive expression of PGIP increased from green to red berries in Korona suggesting developmental regulation of the gene. Wounding and fungal infection caused a moderate or a high induction in the PGIP level, respectively. The maximum peak was observed 24 h after the treatments. In the comparative experiment with five cultivars, infection of white berries caused an induction in the PGIP level 24 h after inoculation in four out of five cultivars.

scholarly journals Ripening and Fruit Weight of Eight Strawberry Cultivars Respond to Row Cover Removal Date

1990 ◽  
Vol 115 (2) ◽  
pp. 202-207 ◽  
Author(s):  
Martin P.N. Gent
Keyword(s):  
Fruit Quality ◽  
Fruit Ripening ◽  
Fruit Development ◽  
Fruit Set ◽  
Fruit Weight ◽  
Direct Relation ◽  
Row Covers ◽  
Marketable Fruit ◽  
Strawberry Cultivars

Strawberry (Fragaria × ananassa Duchesn.) cultivars differ in response to removal date of row covers when they are used for winter protection and to accelerate fruit development and production. In 1986-87 and 1987-88, eight cultivars were overwintered under either spun-bonded polypropylene row cover or under straw. The straw was removed from control plots in late March. Row covers were removed on four dates beginning in late March and separated by about 2-week intervals. The time of flowering, fruit set, and fruit ripening was advanced in direct relation to the time that row covers remained over plants in spring. The differences in time of fruit ripening were less than those of time of flowering, however. The mid-harvest date was advanced as much as 8 days for `Earlidawn' and `Midway', but only 4 days for `Redchief' and `Scott'. Weight per fruit and percentage of marketable fruit were reduced when plants remained under row cover until mid-May. This effect was most noticeable for `Earlidawn', `Guardian', and `Redchief'. The fruit quality of `Midway' and `Jerseybelle' was not significantly affected by date of row cover removal. These cultivar-specific responses were probably not related to the stage of fruit development when row covers were removed, as both early and late-flowering cultivars were sensitive (and insensitive) to the date of row cover removal.

scholarly journals Strawberry Cultivar Evaluation In Quebec

HortScience ◽  
1992 ◽  
Vol 27 (11) ◽  
pp. 1163h-1164
Author(s):  
Shahrokh Khanlzadeh ◽  
Michel J. Lareau ◽  
Deborah Buszard
Keyword(s):  
Total Yield ◽  
Harvest Date ◽  
Yield Variability ◽  
Ripening Period ◽  
Commercial Cultivars ◽  
Mcgill University ◽  
Strawberry Cultivar ◽  
Plant Characteristics ◽  
Strawberry Cultivars

During 1987-90, nineteen strawberry cultivars and one selection from Agriculture Canada/McGill University were evaluated for their fruiting and other plant characteristics. Based upon an index of potential return which Integrates percent yield at each harvest date and total yield, the following cultivars listed in decreasing order of desirability (early productivity) are recommended: `Chambly', `Annapolis', `Honeoye', `Kent' and `Cavendish'. `Lina', `Lester', SJ83OR-2, `Bounty' and `Settler' have the most concentrated ripening period based upon an index of concentration. Highest yields were obtained with `Honeoye', SJ83OR-2, `Chambly', `Kent', Glooscap` and `Oka'. All had large, medium-firm fruit. Because of their tolerance to the herbicide terbacil and their large, medium-firm fruit, `Chambly', `Oka' and SJ830R-2 appear to be potential replacements for the commercial cultivars `Kent', `Honeoye' and `Glooscap' and are recommended for trials in Quebec. `Cornwallis', `Settler', `Midway', `Cavendish' and `Redcoat' had the lowest yield variability of the cultivars on trial.

Response of strawberry fruit yield to plant population density

1981 ◽  
Vol 21 (110) ◽  
pp. 349 ◽  
Author(s):  
B Freeman
Keyword(s):  
Population Density ◽  
Leaf Area ◽  
Plant Population ◽  
High Density ◽  
Fruit Yield ◽  
Strawberry Fruit ◽  
Single Row ◽  
Berry Size ◽  
Marketable Fruit ◽  
Strawberry Cultivars

The yield and profitability of the strawberry cultivars Torrey and Naratoga were compared for two seasons at planting densities ranging from single row beds at 35 000 plants ha-1 to three row beds at 172 000 plants ha-1 Production per plant at the highest density was reduced by approximately 50% and the percentage of culled fruit was greater. Production per hectare of marketable fruit at high density was up to 56% greater than traditional commercial densities of 57 000 plants ha-1. Naratoga out-yielded Torrey in most cases and had fewer culled fruit. In both cultivars leaf area was markedly reduced at high densities but the effect on average berry size was minimal. Profitability was maximized at 172 000 plants ha-1 followed by 87 000 plants ha-1. Naratoga was more profitable than Torrey and all single row treatments showed a net loss.

scholarly journals Crop Response to Soil Acidity Factors in Ultisols and Oxisols in Puerto Rico. XIV. Plantains and Bananas

1969 ◽  
Vol 69 (3) ◽  
pp. 377-382
Author(s):  
Edmundo Rivera ◽  
José Rodríguez ◽  
Fernando Abruña
Keyword(s):  
Puerto Rico ◽  
Yield Components ◽  
Cation Exchange Capacity ◽  
Soil Acidity ◽  
Exchange Capacity ◽  
Crop Response ◽  
Exchangeable Al ◽  
Marketable Fruit ◽  
High Yields ◽  
Leaf Composition

The effect of soil acidity factors on yield components and leaf composition of plantains and bananas were studied on two Ultisols and one Oxisol. Both crops were extremely tolerant to soil acidity factors on all soils. On the Ultisols, plantains produced similar yields although pH varied from 4.1 to 6.0, and exchangeable Al contents from 0 to over 70% of the cation exchange capacity. On the Oxisol, similar yields were produced when pH varied from 4.25 to 5.25, and exchangeable Al contents from 0 to 48%. Soil acidity did not affect bunch weight or number or weight of fruits. Foliar composition was not affected except that Ca content decreased as acidity of the Ultisols increased. Similarly, bananas produced high yields of marketable fruit at all levels of soil acidity and none of the yield components were affected by the soil acidity factors. Foliar composition was not affected except that Ca content decreased with increasing acidity.

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