scholarly journals Control of Pickleworm on Squash with Selective Insecticides, 1997

1998 ◽  
Vol 23 (1) ◽  
pp. 142-143
Author(s):  
Susan E. Webb
Keyword(s):  
Analysis Of Variance ◽  
Hollow Cone ◽  
Central Florida ◽  
Lepidopterous Pest ◽  
Untreated Check ◽  
Direct Seeded ◽  
Research And Education ◽  
Selective Insecticides ◽  
Separation Test

Abstract Insecticides specific for lepidopterous pest-were compared with a standard, Thiodan, and an untreated check for control of pickleworm. Squash was direct seeded on 1 Apr at the Central Florida Research and Education Center, Leesburg, FL. Each plot consisted of four 25-ft rows, 6 ft apart with plants spaced 2.5 ft apart. Treatments were replicated four times in an RCB design. All chemicals were applied with a 2-row tractor-mounted boom sprayer with 18 Albuz (lilac) ceramic hollow-cone nozzles spaced 8 inches apart, delivering 133 gpa at 200 psi. Latron CS-7, a surfactant, was tank-mixed with Confirm and RH-2485 at a concentration of 0.12% vol:vol. Treatments were applied weekly from 14 May to 11 Jun. Fruits were harvested, separated into marketable and damaged, counted, and weighed three times per week from 12 May to 16 Jun. An analysis of variance and a mean separation test (WD) were used to determine significant differences among treatments.

Control of Aphids and Whiteflies on Watermelon, 1995

1997 ◽  
Vol 22 (1) ◽  
pp. 194-194
Author(s):  
S. E. Webb
Keyword(s):  
High Rate ◽  
Hollow Cone ◽  
Central Florida ◽  
Root Transformation ◽  
Aphid Control ◽  
Direct Seeded ◽  
Research And Education ◽  
Separation Test ◽  
Low Rate ◽  
Leaf Disks

Abstract Watermelon was direct-seeded on 30 Mar at the Central Florida Research and Education Center, Leesburg, FL. Each plot consisted of four 35-ft rows, 7 ft apart with plants spaced 2.5 ft apart. Treatments were replicated four times in an RCB design. Fungicide (mancozeb or chlorothalonil) was applied weekly, usually 2 d after insecticides. All materials were applied with a 2-row tractor-mounted boom sprayer with 18 Albuz (lilac) ceramic hollow cone nozzles, spaced 8 inches apart, delivering 178 gpa at 400 psi or 133 gpa at 200 psi (CGA-215944 and Thiodan only). Silwet (0.02% or 0.03%, vohvol) was tank-mixed with Mycotrol. CGA-215944 was tested for aphid control only and was applied when the number of aphids exceeded five per leaf (high rate on 24 May only, low rate on 24 May and 7 Jun). All other treatments were applied on 24 May, 1,7, 13, and 20 Jun except Thiodan which was not applied on 24 May. Small whitefly nymphs (first and second instars) and large nymphs (third and fourth instars, pupae) were counted and summed on three 0.6-inch diam leaf disks cut from each of 20 leaves per plot for 5 weeks, beginning on 29 May and ending on 26 Jun. Aphids were counted on whole leaves. A square root transformation was used to stabilize the variance of counts for analysis. A two-way ANOVA and a mean separation test (Waller-Duncan k-ratio) were used to determine differences among treatments.

scholarly journals Control of Aphids on Spinach with Imidacloprid and Other Treatments, 1996

1998 ◽  
Vol 23 (1) ◽  
pp. 138-139 ◽  
Author(s):  
David Riley
Keyword(s):  
Analysis Of Variance ◽  
Cultural Practices ◽  
Hollow Cone ◽  
Fresh Market ◽  
Foliar Sprays ◽  
Direct Seeded ◽  
Spray Volume ◽  
Spray Applications

Abstract Fresh-market type ‘Fall Green’ spinach, was direct seeded on 11 Oct 1995 in 100-cm-width beds and maintained with standard cultural practices at Weslaco, TX. Plots consisted of two rows by 10 m and were arranged in a RCB design with six treatments and four replicates. Admire (imidacloprid) was applied at planting as an 8-cm banded spray in the seed furrow. All other insecticide treatments were foliar sprays which were initiated when aphid numbers exceeded 1 per leaf. Spray applications were made on January 16, 23 and February 14 with three TX6 hollow-cone tips (Spraying Systems Company) per row. The spray volume was 284 ]/ha. Aphids were counted on one expanded leaf per plant on 5 plants per plot. An additional destructive sample was taken at harvest on 8 and 16 Feb to determine the number of gpa per 10 leaves per plot and number of root aphids per 5 mechanically extracted tap roots. Data were subjected to analysis of variance and LSD tests for separation of treatment means.

scholarly journals Control of Lepidopterous Larvae on Cabbage, 1995

1998 ◽  
Vol 23 (1) ◽  
pp. 81-82
Author(s):  
David G. Riley
Keyword(s):  
Analysis Of Variance ◽  
Cultural Practices ◽  
Diamondback Moth ◽  
Severe Damage ◽  
Hollow Cone ◽  
Fresh Market ◽  
Direct Seeded ◽  
Whole Plants ◽  
Spray Applications

Abstract Fresh-market cabbage was direct seeded on 11 October, 1995 at Weslaco, TX in 100-cm-wide beds and maintained with standard cultural practices. Plots consisted of two rows by 10.7 m and were arranged in a RCB design with sixteen treatments and four replicates. Spray applications were made on 2 Nov, 29 Nov, 14 Dec 1995, and 17 Jan 1996 with three hollow-cone tips per row. Applications were made with 284 1/ha of water. Cabbage loopers, diamondback moth larvae, and beet armyworms were counted on five whole plants per plot. Cabbage heads were harvested on 30 Jan, 5 Feb, and 21 Feb and evaluated for damage from 0 = none to 4 = severe damage to wrapper leaves and/or head. Harvested weight of cabbage was based on an average of two harvests from 5 plants each. Analysis of variance and LSD tests for separation of treatment means were calculated from averages over all sample dates.

scholarly journals Lepidopterous Larvae Control with Insecticides, Pasquotank Co., N.C., 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 99-99
Author(s):  
K. A. Sorensen ◽  
C. Wade Holloway
Keyword(s):  
Hollow Cone ◽  
Single Row ◽  
Foliar Damage ◽  
Direct Seeded

Abstract ‘Gourmet’ cabbage was direct seeded in early Mar near Weeksville, NC. Single row plots 10 ft. long on 42 inch centers were replicated 4 times in a RCB design. Alleys of 5 ft. were used between replicates. Treatments were applied with a CO2 pressurized backpack sprayer using a single hollow cone nozzle (18X) operating at 60 psi to deliver 54.5 gal/acre. Applications with Triton AG-98 (spreader) were made with all treatments 2, 9, 16 and 23 May. Visual estimates of foliar damage and insect counts were made 9, 16, 23 and 30 May. No CL were present on 9 and 16 May.

scholarly journals Control of Aphids on Mustard in a Commercial Field, 1996

1997 ◽  
Vol 22 (1) ◽  
pp. 137-137
Author(s):  
J. V. Edelson ◽  
M. Peters
Keyword(s):  
Experimental Design ◽  
Treatment Effects ◽  
Commercial Production ◽  
Hollow Cone ◽  
Insect Populations ◽  
Direct Seeded ◽  
Commercial Field

Abstract A commercial production field of mustard was used for this trial. Plants were grown in 6 row beds on 6 ft centers. The field was direct seeded in Apr approximately 1 mile west of Webbers Falls, OK. Small plots were delimited on one edge of the field. The experimental design was a RCB with 4 replicates and 7 treatments. Insecticide applications were made on 23 and 29 May using a bicycle tire mounted sprayer with 4 hollow cone nozzles (TXVS26) per bed applying 40 gpa solution at 42 psi. Plots were 1 bed wide and 20 ft long with 5 ft alleys between plots. Insect populations were surveyed by examining 5 plants per plot on 29 May (prior to the second application of insecticides) and 3 Jun to determine treatment effects.

Quantifying the Effects of Fungicides and Tillage on Cercospora sojina Severity and Yield of Soybean

2018 ◽  
Vol 19 (3) ◽  
pp. 226-232
Author(s):  
Alemu Mengistu ◽  
Heather M. Kelly ◽  
Prakash R. Arelli ◽  
Nacer Bellaloui ◽  
Binbin Lin
Keyword(s):  
Disease Severity ◽  
Environmental Conditions ◽  
Leaf Spot ◽  
Cercospora Sojina ◽  
University Of Tennessee ◽  
No Till ◽  
Untreated Check ◽  
Severity Of The Disease ◽  
Research And Education ◽  
The University

A field study was conducted in 2014 through 2016 at the University of Tennessee Research and Education Center, Milan, TN, to determine fungicide effects on frogeye leaf spot (FLS) caused by Cercospora sojina and to determine disease severity and yield under no-till and tillage. Each plot was visually rated for FLS severity based on the percent leaf area covered from 0 to 100%. The result showed that tillage did not affect severity of the disease or yield. However, there were significant effects from fungicide, year-to-year effects, and fungicide × year interactions. Among the three years, disease severity in 2016 was greater than in 2014 and 2015. Among the six fungicides, Topsin, Topguard, Quadris TOP SBX, and Priaxor significantly (P ≤ 0.05) reduced maximum disease severity in 2016. All fungicide applications improved yield relative to the untreated check. Topsin and Quadris TOP SBX, however, had consistently the highest percent yield increases. These results suggest that not all fungicides that reduced FLS severity equally protected yield, indicating that yield and environmental conditions need to be considered when making appropriate fungicide recommendations in tilled and no-till systems.

scholarly journals Evaluation of Efficacy of Selected Conventional and Experimental Insecticides and Bt Hybrids for Control of Corn Earworm and European Corn Borer on Sweet Corn, 1997

1998 ◽  
Vol 23 (1) ◽  
pp. 99-100
Author(s):  
J. T. Shaw ◽  
R. Weinzierl ◽  
J. W. Finger
Keyword(s):  
European Corn Borer ◽  
Sweet Corn ◽  
Corn Earworm ◽  
Compressed Air ◽  
Hollow Cone ◽  
Corn Hybrids ◽  
Corn Borer ◽  
Chemical Treatments ◽  
Untreated Check ◽  
High Clearance

Abstract The tests were arranged in a RCB design with four replications. Each plot consisted of four rows, each being 30 inches wide and 50 ft long. Thirty-foot-wide alleys were established between the four replications. Insecticides were applied to the middle two rows of each plot, leaving two untreated rows between adjoining plots. Twelve insecticide treatments were compared with two Br-sweet corn hybrids (Heritage Bt and Bonus Bt) and their non-Bt isolines to two untreated controls. The 12 chemical treatments and the two untreated checks were planted with the Silver King variety sweet corn. Two untreated check plots were included in each replication and were averaged for the ANOVA. Treatments were applied very four to five days beginning on 8 Aug at 8% silk. All insecticide treatments were applied with a modified John Deere 6000 high-clearance vehicle (HCV) with a rear-mounted boom. Six Conejet (TX VS-8) hollow-cone nozzles (three per row) were calibrated to deliver 30.1 gpa at 40 psi and a speed of 2.5 mph, utilizing a compressed air system. Four nozzles (two per row) were attached to drops and directed the spray towards the ear zone area, a third nozzle (one per row) was mounted directly over the row with the spray being directed into the whorl (tassel) area.

scholarly journals Green Peach Aphid Control With Foliar Sprays, 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 171-171
Author(s):  
Robert L. Stoltz ◽  
Nancy A. Matteson
Keyword(s):  
Green Peach Aphid ◽  
Sweet Pepper ◽  
Individual Treatment ◽  
Row Spacing ◽  
Silt Loam ◽  
Hollow Cone ◽  
Aphid Control ◽  
Untreated Check ◽  
Extension Center ◽  
Pepper Plants

Abstract Experimental plots were established on the UI Research and Extension Center, Kimberly, Idaho. Potatoes were planted on 25 Apr and irrigated by solid set sprinkler. The soil type was Portneuf silt loam. Four treatments and one untreated check plot were replicated four times in a RCB design. Individual treatment plots were 4 rows (36 inch row spacing) wide by 25 ft long with 5 ft alleyways separating the plots. Green peach aphids were mass reared on greenhouse sweet pepper plants (California Wonder) for release into individual plots. Aphid releases were made into test plots the last wk in Jun and again in the first wk of Jul. A total of four heavily infested pepper plants was released per plot. Treatment sprays were broadcast applied using a CO2 pressurized backpack sprayer (30 psi) and delivering 20 gal finished spray per acre (four, 10X hollow cone nozzles). Aphid counts were made from non-destructively examining 10 randomly selected leaves in the center two rows of each plot. Leaves were sampled from the top, middle, and bottom sections of the plants. The data collected and presented are the total number of aphids per 20 leaves. On 19 Jul a pre-count was taken and on 21 Jul all treatment applications were made. Data were analyzed using ANOVA and Student-Newman-Keuls multiple means comparison.

First Report of Macrophomina phaseolina, Fusarium brachygibbosum, and Lasiodiplodia theobromae Causing Fungal Watermelon Vine Decline in Southwest and West-Central Florida

2021 ◽  
Author(s):  
Cristina Pisani ◽  
Scott Adkins ◽  
William W Turechek ◽  
Pragna C Patel ◽  
Erin Rosskopf
Keyword(s):  
Disease Severity ◽  
Fungal Pathogens ◽  
Disease Incidence ◽  
Macrophomina Phaseolina ◽  
Lasiodiplodia Theobromae ◽  
First Report ◽  
Central Florida ◽  
Untreated Check ◽  
Vine Decline ◽  
Yellowing Virus

Wilt and vine decline symptoms were observed on watermelon plants in Glades and Hardee Counties in Florida in spring 2017 that resembled viral watermelon vine decline caused by squash vein yellowing virus (SqVYV). When no SqVYV was detected, greenhouse studies and morphological and molecular analyses revealed three fungal pathogens, Macrophomina phaseolina, Fusarium brachygibbosum, and Lasiodiplodia theobromae, that were not previously reported on watermelon in Florida. A previously reported oomycete, Pythium spinosum, was also detected in some, but not all isolates, and but when applied independently, resulted in disease incidence that was comparable to the untreated check, ruling it out as a primary causal agent of the symptoms observed in the field. In one of three experiments, seedlings inoculated with a combination of Macrophomina phaseolina, Fusarium brachygibbosum, and Pythium spinosum suffered the highest disease severity based on AUDPC values. In another experiment, seedlings inoculated with F. brachygibbosum exhibited the most severe symptoms and rapid disease development following inoculation. When seeds were inoculated with either a single or a combination of the isolated fungi, those inoculated with L. theobromae resulted in seedlings with the greatest disease severity. This is the first report of these three fungal pathogens on watermelon in Florida.

‘Florida Beauty’ Strawberry

EDIS ◽  
2017 ◽  
Vol 2017 (6) ◽  
Author(s):  
Vance M. Whitaker ◽  
Natalia A. Peres ◽  
Shinsuke Agehara
Keyword(s):  
Gulf Coast ◽  
Female Parent ◽  
University Of Florida ◽  
Central Florida ◽  
Industry Standard ◽  
Florida Gulf Coast ◽  
Commercial Farms ◽  
Strawberry Cultivar ◽  
Research And Education ◽  
The University

‘Florida Beauty’ (PPAF) is a new strawberry cultivar released by the University of Florida and commercialized in 2017. This cultivar was originally evaluated as breeding selection FL 12.121-5. ‘Florida Beauty’ originated from a 2012 cross between Queensland Australia selection 2010-119 (female parent) and ‘Florida Radiance’ (male parent). It has been tested over several years in field plots at the University of Florida Gulf Coast Research and Education Center (GCREC) in Wimauma, FL, at the Florida Strawberry Growers Association (FSGA) headquarters in Dover, FL, and on several commercial farms. Data from these trials have been used to generate the following information and recommendations to help growers obtain optimum performance of this cultivar in west-central Florida. Comparisons are made to the current industry standard cultivars ‘Florida Radiance’ (Chandler et al. 2009) and Sweet Sensation® ‘Florida127’ (Whitaker et al. 2015) (hereafter referred to as ‘Florida127’).

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