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 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.

scholarly journals Greenhouse Evaluation of Insecticides for Control of Yellow Sugarcane Aphid and Greenbug on Sorghum Seedlings, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 230-230
Author(s):  
R. M. Anderson ◽  
G. L. Teetes
Keyword(s):  
Grain Sorghum ◽  
Hollow Cone ◽  
Soil Mixture ◽  
Insecticide Application ◽  
Sugarcane Aphid ◽  
Greenhouse Evaluation ◽  
Seedling Plant ◽  
Plant Emergence ◽  
Spray Volume ◽  
Pre Treatment

Abstract Foliar treatments of 2 organophosphates and imidachloprid (Confidor) were evaluated for yellow sugarcane aphid (YSA) and greenbug (GB) control in a research greenhouse at Texas A&M University. Hybrid grain sorghum seedlings (ATx399 × RTx430) were grown in 110-mm germination pots containing a prepared soil mixture composed of peat, vermiculite, and periite in a 2:1:1 ratio, respectively. Four days after plant emergence and 3 d prior to insecticide applications, each seedling plant was infested with 10-20 YSA or GB. There were 5 singleseedling replications for each treatment. Insecticides were applied by using a CO2-pressurized backpack sprayer, through TX-3 hollow-cone nozzles at 35 psi, producing a finished spray volume of 5.6 gpa. Pre-treatment counts of YSA and GB were made the day of insecticide application; post-treatment counts of aphids were made 1, 2, and 3 DAT. Percent control was calculated by using Abbott’s (1925) formula. Data were statistically analyzed by using ANOVA and LSD.

scholarly journals Between-row spacing and local accession on the yield and quality of garlic

2016 ◽  
Vol 7 (1) ◽  
pp. 112 ◽  
Author(s):  
Jamal-Ali Olfati ◽  
Mohammad-Bagher Mahdieh-Najafabadi ◽  
Mohammad Rabiee
Keyword(s):  
Plant Density ◽  
Cultural Practices ◽  
Block Design ◽  
Growth Yield ◽  
Row Spacing ◽  
Fresh Market ◽  
Yield And Quality ◽  
High Plant Density ◽  
Plant Stand

Garlic is primarily grown for its cloves used mostly as a food flavoring condiment. Previous studies carried out on plant density indicate its direct influence on yield. Plant density depends on the genotype, environmental factors, cultural practices, etc. This study was established to determine the effects of different between-row spacing on growth, yield, and quality of four local accession of garlic. It was laid out on two-factorial Randomized Complete Block Design with three replications during two years. Four local accession of garlic (Langroud, Tarom, Tabriz and Hamedan) were culture in three between-rows spacing (15, 25 and 35 cm) during two years. The results of two cultivated years were different. Plant density changed when garlic cultured with different between row spacing. In present research plant yield increased when the lower between row spacing and high plant density were used but the yield improvement occurring at increased plant stand is offset by the reduction in bulb size and some quality indices such as total phenol and antioxidant which severely affects quality and market value, when garlic is produced for fresh market.

scholarly journals Comparison of Pymetrozine (Cga 215944) and Imidacloprid (Provado) Foliar Sprays to Control Aphids in Tomatoes, 1996

1997 ◽  
Vol 22 (1) ◽  
pp. 185-185
Author(s):  
John Speese
Keyword(s):  
Agricultural Research ◽  
Test Field ◽  
Single Application ◽  
Eastern Shore ◽  
Hollow Cone ◽  
Potato Aphid ◽  
Single Row ◽  
Foliar Sprays ◽  
Extension Center ◽  
Aphid Populations

Abstract Tomatoes were transplanted on 9 Aug at the Eastern Shore Agricultural Research and Extension Center, Painter, VA. Each plot consisted of a single row 20 ft X 5 ft, bordered on each side by an untreated guard row. On 1 Oct, heavy potato aphid populations developed in the test field. A pre-count of live aphids on 5 randomly picked compound leaves/plot was taken on this date and followed by a single application of all treatments. Treatments were applied with a backpack sprayer equipped with a 3 hollow cone nozzle boom and delivering 46 gal water/acre at 40 psi. To evaluate efficacy, the plots were sampled as previously described for the pre-count on the dates indicated in the table.

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.

Control of Insects on Potatoes, 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 139-140
Author(s):  
R. E. Foster ◽  
W. G. Buhler
Keyword(s):  
Hollow Cone ◽  
Foliar Sprays ◽  
Sweep Net

Abstract Seed pieces were planted 15 May at the Pinney Purdue Research Farm, Wanatah, Indiana. Plots consisted of single rows, 30 ft long, 5 ft apart, arranged in a RCB with four replications. Insecticides were applied with a CO2powered backpack sprayer using hollow cone nozzle tips and delivering 16.3 gal water/acre at 30 psi. All Admire 2F treatments were applied in the furrow at planting. Foliar sprays were applied 28 Jun, 12 and 31 Jul. CPB were counted on ten plants per plot on 27 Jun, 5, 17 Jul and 7 Aug. PLH adults were monitored with a sweep net. Results are presented as the average number of CPB per 10 plants or average number of PLH adults per 20 sweeps. Yields were measured by harvesting all marketable tubers from each plot on 30 Aug.

Rice weed control: current technology and emerging issues in temperate rice

1994 ◽  
Vol 34 (7) ◽  
pp. 1021 ◽  
Author(s):  
JE Hill ◽  
RJ Jr Smith ◽  
DE Bayer
Keyword(s):  
United States ◽  
Weed Control ◽  
Cultural Practices ◽  
Management Strategies ◽  
The United States ◽  
Weed Species ◽  
Rice Culture ◽  
Emerging Issues ◽  
Direct Seeded ◽  
The Cost

Among temperate rice areas, the United States and Australia are most similar in climate and in the mechanisation of rice culture. Many weed problems, even weed species invading rice, are common to both countries; and the present technology for weed control as well as concern for the impact of these technologies to environmental quality, herbicide resistance, and other weed-related issues bear many similarities. Application of current, and any new, technologies to emerging issues in US rice weed control will therefore be directly relevant to rice production in Australia and all other temperate areas struggling with the same challenges. Weeds are a significant problem in temperate rice culture. In the United States, rice is mechanically direct-seeded, allowing weeds to germinate and establish with the crop. In the last 15 years weed growth and competition has been increased by the adoption of semi-dwarf cultivars, high N fertilisation, and, in water-seeded rice, shallow flooding. High rates, and often multiple applications, of herbicides have been necessary to maximise the yield potential of these cultural systems. Advances in cultural practices and herbicide technology have maintained, if not improved, weed control; but nearly 30 years of propanil use in the southern USA resulted in propanil-resistant barnyard grass Echinochloa crus-galli (L.) Beauv., and after 4 years of continuous use, bensulfuron resistance to 4 aquatic weed species was discovered in California. Although herbicides with different mechanisms of action are needed for alternation in resistance management strategies, fewer are likely to be available. Social and environmental concerns have slowed the development and registration of rice herbicides and increased the cost of controlling weeds. Water quality deterioration from ricefield tailwaters, drift to sensitive crops, the cost of renewing registration in aquatic systems, and weed resistance all forecast reduced herbicide use in rice. Neither cultural practices nor herbicides alone can solve weed problems in direct-seeded, mechanised rice culture. With fewer herbicides and a cultural system highly vulnerable to weed losses, integrated management strategies with better information on which to base weed control decisions will be needed to solve weed problems in temperate rice.

scholarly journals Control of Imported Cabbageworm on Late Season Cabbage, 1993

1994 ◽  
Vol 19 (1) ◽  
pp. 67-67
Author(s):  
Donald J. Prostak
Keyword(s):  
Cultural Practices ◽  
Block Design ◽  
Hollow Cone ◽  
Late Season ◽  
Randomized Complete Block Design

Abstract Cabbage was transplanted on 9 Aug at the Snyder Research and Extension Farm, Pittstown, NJ. Treatment plots were replicated 4 times in a randomized complete block design and consisted of single rows, 30 ft long on 5 ft centers with 3 ft between plants. Buffers were 5 ft between rows and 12 ft between plots within rows. Standard cultural practices were used throughout the trial. Treatments were applied on 15, 18 Sep, and 1 Oct with a COz-pressurized single hollow-cone nozzle, hand-held sprayer that delivered 73.5 gal/acre directed at the upper surface of all leaves. Activator 90, a spreader-sticker, was added at the rate of 1 pt/100 gal to all treatments. Plots were evaluated on 28 Sep and 5 Oct by examining 5 plants from the middle of each replicate. All ICW larvae on the leaves were identified and counted.

Sign in / Sign up

Export Citation Format

Share Document