scholarly journals Control of Corn Lepidoptera with Foliar Applications, 1997

1998 ◽  
Vol 23 (1) ◽  
pp. 100-101
Author(s):  
A. M. Shelton ◽  
W. T. Wilsey
Keyword(s):  
Sweet Corn ◽  
Vegetable Crops ◽  
Plant Spacing ◽  
Foliar Sprays ◽  
Ear Injury ◽  
Over The Top

Abstract Two separate trials were conducted. Corn for the first trial was planted on 28 May and for the second trial on 12 Jun, both at the Vegetable Crops Research Farm near Geneva, NY. The plants were arranged in a RCB design with four replicates of nine treatments and one check. Plots consisted of seven 25-ft rows of sweet corn on 30-inch centers with 9-inch plant spacing. Blocks were separated by 25 ft. Treatments involved three applications of each insecticide for controlling naturally intesting Lepidoptera. Foliar sprays were applied with a 5-row CO2-pressurized high-boy tractor-mounted boom, having 3 nozzles per row (one over the top and one drop nozzle on each side) with flat fan 110015 tips, and delivering 30 gpa at 47 psi and 2.5 mph. Silwet L-77 spray adjuvant was applied at 0.1% v/v with all treatments. In the first trial, insecticides were applied on 8, 15, and 23 Aug. Treatments for the second trial were applied on 15, 23 Aug, and 2 Sep. Trials were evalu-ated on 2 and 8 Sep for the respective plots by selecting 25 ears from the five treated rows of each plot and evaluating them for ear injury.

scholarly journals Control of Lepidopterous Insects on Corn with Foliar Applications, 1996

1997 ◽  
Vol 22 (1) ◽  
pp. 124-124
Author(s):  
A. M. Shelton ◽  
W. T. Wilsey
Keyword(s):  
Sweet Corn ◽  
Vegetable Crops ◽  
Plant Spacing ◽  
Foliar Sprays ◽  
Untreated Check ◽  
Ear Injury

Abstract Corn was planted on 27 Jun at the Vegetable Crops Research Farm near Geneva, NY. The planting consisted of a RCB design with four replicates of six treatments and one untreated check. Plots consisted of six 25-ft rows of sweet corn on 3 ft centers with 9-inch plant spacing. Blocks were separated by 25 ft. Treatments consisted of three applications of each insecticide for naturally intesting lepidopterans. Foliar sprays were applied with a 4-row high-boy tractor-mounted boom, having 3 nozzles per row with flat fan 110015 tips, and delivering 26.4 gpa at 47 psi and 2.5 mph. Silwet sticker-spreader was applied at 0.1% v/v with all foliar treatments. Insecticides were applied on 4, 11 and 20 Sep. On 7 Oct, 25 ears from the four treated rows of each plot were evaluated for ear injury.

scholarly journals Effect of Pesticides on the Yield of Some Vegetable Crops in the Isabela Area of Puerto Rico

1969 ◽  
Vol 46 (1) ◽  
pp. 1-8
Author(s):  
R. Abrams ◽  
D. Walker ◽  
M. Rico Ballester
Keyword(s):  
Puerto Rico ◽  
Sweet Corn ◽  
Vegetable Crops ◽  
Foliar Sprays ◽  
Snap Beans ◽  
Yield And Quality

The effects of different pesticides, namely, Parathion, DDT, Guthion, Di-Syston, and Dylox on the yield and quality of vegetable crops, were studied in the Isabela Area. The following major results were obtained: 1. Cucumbers: Sprays with Parathion or Guthion had no effect on the yield and number of fruits produced. 2. Snap beans: DDT application at the rate of 2 pounds per acre gave a significant increase in yield. Guthion, sprayed at the rate of 6 pounds per acre per spray, also produced a significant increase in the yield. 3. Sweet corn: DDT applications at the rate of 4 pounds per acre, sprayed on weekly, controlled foliage injury and, consequently, healthier and more vigorous plants were obtained. Foliar sprays of DDT, at the same rate as above, increased the number of ears produced. Spraying the silks with DDT at the rate of 4 pounds per acre per application, or dusting them with Dylox granular, 1 pound per acre, improved the quality of the ears produced. 4. Tomatoes: Foliar sprays with DDT and Parathion did not cause a significant increase in yield nor in the number of marketable fruits produced. Granular Di-Syston at the rate of 10 pounds per acre, had no effect on the yield or number of marketable fruits in this experiment.

scholarly journals PENGARUH JARAK TANAM JAGUNG MANIS (Zea mays Saccharata STURT) DAN VARIETAS KUBIS (Brassica oleracea VAR. CAPITATA) TERHADAP HASIL JAGUNG MANIS DAN KUBIS PADA SISTEM TUMPANGSARI DI DESA CANDI KUNING, TABANAN

AGRICA ◽  
2020 ◽  
Vol 2 (1) ◽  
pp. 1-9
Author(s):  
I Wayan Sunarta
Keyword(s):  
Land Use ◽  
Sweet Corn ◽  
Block Design ◽  
Plant Spacing ◽  
Fresh Weight ◽  
Corn Plant ◽  
Dryland Farming ◽  
Randomized Complete Block Design ◽  
Two Factors ◽  
Short Season

Diversification of plant species is needed to anticipate price fluctuation of vegetables. Intercropping system compared to monoculture can give more benefits to farmers. The arrangement of plant spacings of sweet corn and cabbage variety is expected to result in higher yields and benefits in intercropping. The field experiment, which had the objective to study the effects of plant spacing of sweet corn and cabbage variety on yields of sweet corn and cabbage in the intercropping system, had been conducted from March to July 2008. The experiment was carried out at the dryland farming area at Candikuning Village, district of Baturiti, Tabanan regency, 1.200 m asl. In the experiment, a randomized complete block design with two factors namely plant spacing of sweet corn (120 cm x40 cm, 180 cm x 40 cm and 240 cm x 40 cm) and variety of cabbage (Green Nova and Summer-Autumn) were used. Plant spacing of cabbage was 60 cm x 40 cm. All treatments were replicated four times. The results of the experiment showed that the effect of interaction between plant spacing of sweet corn and cabbage variety in intercropping was not significant on yields of sweet corn and cabbage. Individually, sweet corn plant spacing of 120 cm x40 cm gave the highest fresh weight of cob without husk (10,91 t ha"'), which was 44.50% and 80.93% respectively higher than the spacing of ! 80 cm x 40 cm and 240 cm x 40 cm. The spacing of 180 cm x 40 cm resulted in not the significantly different fresh weight of cob with husk but gave the highest fresh weight of cabbage heads (56.101 ha'1), which was 27.36% higher than that at sweet corn spacing of 120 cm x 40 cm and was not significantly different from that at 240 cm x 40 cm. Cabbage variety Green Nova gave the highest head (56.101 ha1), which was 14.48% higher than variety Summer-Autumn. Intercropping between cabbage variety Green Nova and Sweet corn at 180 cm x 40 cm spacing resulted in the highest benefit (Rp. 20,488125 t ha'1), which was Rp. 3,335500 higher than the average benefit of cabbage monoculture. The efficiency of land use in intercropping was higher (LER: 1.69) than in monoculture (LER: 1). It is suggested to use cabbage variety Green Nova intercropped with sweet corn at I 80 cm x 40 cm spacing. An experiment studying the effect of cabbage intercropped with sweet corn and other short season vegetables planted after harvesting cabbages is also suggested.

scholarly journals Flame Cultivation for Controlling Weeds

HortScience ◽  
1996 ◽  
Vol 31 (4) ◽  
pp. 696a-696
Author(s):  
Richard L. Parish
Keyword(s):  
Cell Walls ◽  
Public Perception ◽  
Sweet Corn ◽  
Vegetable Crops ◽  
Limited Efficacy ◽  
Lima Beans ◽  
Gas Flame ◽  
Cotton Farmers ◽  
Water Shield ◽  
Selection Of

Flame “cultivation” for weed control was developed about 50 years ago. The practice was very popular with Southern cotton farmers through the 1950s and 1960s, but lost favor when petroleum prices rose drastically in the 1970s. There is now a new interest in the practice of flame cultivation as a partial or total replacement for herbicides in vegetable crops. This interest is fueled by three factors: 1) an increasingly negative public perception of herbicides on vegetables, 2) a very limited selection of herbicides labeled for vegetables, and 3) limited efficacy of some of the herbicides that are registered. Flame cultivation, in combination with mechanical cultivation, can replace or supplement herbicides in some vegetable crops. The mode of action of flame cultivation is the bursting of cell walls in the weeds as the weeds are heated by a carefully directed LP gas flame. With most vegetable crops, the crop plants must be protected in some manner. This can be done with a water shield (flat fan water spray), height differential between weeds and crop, physical shield, etc. Much of the early work on flame cultivation of vegetables was done with sweet corn. Work is now underway on flame cultivation of lima beans and southernpeas, where multiple flame cultivations have proven effective at controlling weeds for which no herbicide is available.

scholarly journals Crop Nutrient Survey Results for Five Vegetable Crops in Dade County, Florida

HortScience ◽  
1997 ◽  
Vol 32 (3) ◽  
pp. 524B-524
Author(s):  
Mary Lamberts ◽  
Teresa Olczyk ◽  
Stephen K. O'Hair ◽  
Juan Carranza ◽  
Herbert H. Bryan ◽  
...  
Keyword(s):  
Cover Crops ◽  
Management Practices ◽  
Sweet Corn ◽  
Baseline Survey ◽  
Dade County ◽  
Vegetable Crops ◽  
Fertilizer Management ◽  
Fertilizer Recommendations ◽  
Survey Results ◽  
Fertilizer Rates

A baseline survey was conducted to determine grower fertilizer management practices for five vegetable crops: beans, malanga, potatoes, sweet corn, and squash. This was done in conjunction with a 3-year replicated fertility trial with four vegetable crops (1993–94 through 1995–96) in the Homestead area. Questions included: fertilizer rates and timing, source(s) of fertilizer recommendations, soil and tissue testing, irrigation, changes in practices, summer cover crops, rock plowing, spacing, and type of fertilizer used. Survey results will be presented.

scholarly journals Response of Four Vegetable Crops to Fluridone-treated Irrigation Water

1996 ◽  
Vol 6 (4) ◽  
pp. 396-400
Author(s):  
Stratford H. Kay ◽  
Ross B. Leidy ◽  
David W. Monks
Keyword(s):  
Irrigation Water ◽  
Sweet Corn ◽  
Sandy Loam ◽  
Matter Content ◽  
Bell Pepper ◽  
Loamy Sand ◽  
Vegetable Crops ◽  
Humic Matter ◽  
Zea May ◽  
Aquatic Herbicide

Greenhouse studies examined the effects of an aquatic herbicide (fluridone) in irrigation water on four vegetable crops growing on two soils. Tests on Fuquay loamy sand (0.3% humic matter) and Portsmouth fine sandy loam (4.1% humic matter) examined fluridone concentrations ≤250 μg·L−1. Injury to sweet corn (Zea may L.), cucumber (Cucumis sativus L.), bell pepper (Capsicum annum L.), and tomato (Lycopersicon esculentum L.) on these soils varied with soil type and stage of plant growth. Seedlings or new transplants were more susceptible to fluridone damage than older plants. All plants showed more injury on Fuquay loamy sand, which had the lowest humic matter content. Injury to cucumber occurred only to seedlings exposed to 250 μg·L−1 on the Fuquay loamy sand. Bell pepper was the most sensitive crop to fluridone. The “no observed effects level” below which no significant injury of a crop occurred over both soil types and both stages of crop maturity was 5 μg·L−1 for sweet corn, bell pepper, and tomato and 100 μg·L−1 for cucumber.

scholarly journals Extending Crop Nutrient Information: Involving the Whole Industry

HortScience ◽  
1996 ◽  
Vol 31 (4) ◽  
pp. 594e-594
Author(s):  
Mary Lamberts ◽  
Teresa Olczyk ◽  
Stephen K. O'Hair ◽  
Juan Carranza ◽  
Herbert H. Bryan ◽  
...  
Keyword(s):  
Sweet Corn ◽  
Soil Testing ◽  
Dade County ◽  
Vegetable Crops ◽  
Nutrient Requirements ◽  
Testing Model ◽  
Additional Information ◽  
Snap Beans ◽  
Xanthosoma Sagittifolium ◽  
Plant Sap

Replicated fertility trials with four vegetable crops on the limestone soils of Dade County, Fla., have been conducted for 3 years (1993–94 through 1995–96). The purpose was 1) to determine crop nutrient requirements, 2) to calibrate a soil testing model, and 3) to develop additional information for plant sap quick tests. The crops included snap beans, Irish potatoes, sweet corn, and malanga (a.k.a. yautia or tannia, Xanthosoma sagittifolium Schott). Another two field demonstrations using reduced rates of phosphorus on tomatoes were conducted in 1995–96. The involvement of the local fertilizer industry in these trials and grower outreach efforts will be discussed.

scholarly journals Can Sunn Hemp Decrease Nitrogen Fertilizer Requirements of Vegetable Crops in the Southeastern United States?

HortScience ◽  
2006 ◽  
Vol 41 (4) ◽  
pp. 1005D-1005 ◽  
Author(s):  
Laura Avila ◽  
Johannes Scholberg ◽  
Nancy Roe ◽  
Corey Cherr
Keyword(s):  
Fossil Fuels ◽  
Sweet Corn ◽  
Community Supported Agriculture ◽  
Corn Yield ◽  
Vegetable Crops ◽  
Vegetable Crop ◽  
Conventional Agriculture ◽  
Sunn Hemp ◽  
N Rates ◽  
Farm System

Increased dependency of conventional agriculture on inorganic fertilizers and fossil fuels may hamper long-term sustainability of agricultural production. Sunn hemp (Crotalaria juncea) was tested during summer in a Community Supported Agriculture vegetable crop operation located in Southeast Florida, from 2003 to 2005. Farm system components included sunn hemp (SH) vs. a conventional fallow during summer, tomato (Lycopersicon esculentus) and pepper (Capsicum annum) during winter and spring sweet corn (Zea mays). Tomato and pepper were fertilized with 0, 67, 133, 200 kg N/ha (2003) vs. 0,100, 200 kg N/ha (2004/05). Sweet corn received 133 or 200 kg N ha (2003) vs. 100 kg N/ha (2004/05). Average SH biomass was 3.7 Mg/ha. In 2003 tomato yields following SH without supplemental N were similar to fallow, with 200 kg N/ha. By the third year, tomato and pepper yields in SH plots were 25% and 26% higher, respectively. Conventional pepper amended with 200 kg N/ha had only 8% higher yields than treatments amended with 100 kg N ha and CC. Overall, sweet corn had low yields, but yields increased if the preceding tomato/pepper crop received higher N rates. In 2003, sweet corn fertilized with 200 kg N/ha following a SH-fall vegetable crop produced 17% higher marketable yields compared to the fallow treatment. During 2004 and 2005, sweet corn within the SH-non-fertilized tomato system produced 29% higher yields compared to a similar conventional system. Results show that, in this rotation, both fall vegetable crops and sweet corn yield benefit from residual N fertilizer. Mineralization of SH may thus not only benefit the immediately following crop, but its effects can be seen later during the year.

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