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2005

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Articles 61 - 90 of 126

Full-Text Articles in Agricultural Science

Carbaryl Resistance In Mexican Strains Of The Southern Cattle Tick (Acari: Ixodidae), Andrew Y. Li, Ronald B. Davey, John E. George Jan 2005

Carbaryl Resistance In Mexican Strains Of The Southern Cattle Tick (Acari: Ixodidae), Andrew Y. Li, Ronald B. Davey, John E. George

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Susceptibility to carbaryl in six Mexican strains of the southern cattle tick, Boophilus microplus (Canestrini), was evaluated with the Food and Agricultural Organization larval packet test. Tick strains from the cattle fever tick quarantine zone in Texas were more susceptible to carbaryl than to coumaphos or diazinon. Compared with the susceptible reference (Gonzalez) strain, Mexican tick strains demonstrated 10.9Ð59.5-fold resistance to carbaryl. SigniÞcant cross-resistance was found between carbaryl and the organophosphate acaricides coumaphos and diazinon. Bioassay results with synergists suggested that metabolic detoxification mechanisms did not play a major role in carbaryl resistance. Resistance to carbaryl was likely conferred by …

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Insect Transmission Of Plant Pathogens, Rodrigo P. P. Almeida, Astri Wayadande, Todd Shelly Jan 2005

Insect Transmission Of Plant Pathogens, Rodrigo P. P. Almeida, Astri Wayadande, Todd Shelly

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Much of biological research conducted today is multidisciplinary, partly because of the availability of ever simpler to use molecular tools and the realization that ecological systems are complex and multitrophic. Although there is a general trend toward academic specialization and cooperation, some fields still require that scientists be aware of the “bigger picture.” We consider that the study of insect-transmitted plant pathogens is one of those fields, where insect, pathogen, and plant are inseparably linked. In this triangle of interactions, researchers focus their interests on questions at the molecular and cellular to epidemiological levels. Throughout the years, plant vector entomologists …

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Maintenance Of A Narrow Host Range By Oxyops Vitiosa; A Biological Control Agent Of Melaleuca Quinquenervia, G. S. Wheeler Jan 2005

Maintenance Of A Narrow Host Range By Oxyops Vitiosa; A Biological Control Agent Of Melaleuca Quinquenervia, G. S. Wheeler

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Host range expansion in insect herbivores is often thought to be mediated by several factors, principal among them are secondary plant metabolites. In weed biological control, the host range of a prospective agent is one of the most important considerations in its implementation. Extensive host testing tests seek to determine the behavioral acceptance and nutritional value of different test plant species to the potential agent. A list of test plants is compiled that comprises species that are close taxonomic relatives of the target weed plus other species of economic or ecologic importance. The host testing of the Melaleuca quinquenervia biological …

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Postweaning Performance Of Hair And Wool Sheep And Reciprocal-Crosses On Pasture And In Feedlot, M. A. Brown, H. S. Mayeux Jan 2005

Postweaning Performance Of Hair And Wool Sheep And Reciprocal-Crosses On Pasture And In Feedlot, M. A. Brown, H. S. Mayeux

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Lambs from three diallel-mating plans (Dorset-St. Croix, n=140; Rambouillet-Gulf Coast, n=80; Katahdin-Suffolk, n=78) and a terminal-cross mating plan (Suffolk rams mated to Dorset, St. Croix and reciprocal-cross ewes, n=100) were used to evaluate postweaning grazing performance of traditional meat breeds and tropically adapted breeds of sheep.

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Integration Of Co 2 Flux And Remotelysensed Data For Primary Production And Ecosystem Respiration Analyses In The Northern Great Plains: Potential For Quantitative Spatial Extrapolation, Tagir G. Gilmanov, Larry L. Tieszen, Bruce K. Wylie, Larry B. Flanagan, Albert B. Frank, Marshall R. Haferkamp, Tilden P. Meyers, Jack A. Morgan Jan 2005

Integration Of Co 2 Flux And Remotelysensed Data For Primary Production And Ecosystem Respiration Analyses In The Northern Great Plains: Potential For Quantitative Spatial Extrapolation, Tagir G. Gilmanov, Larry L. Tieszen, Bruce K. Wylie, Larry B. Flanagan, Albert B. Frank, Marshall R. Haferkamp, Tilden P. Meyers, Jack A. Morgan

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Aim Extrapolation of tower CO2 fluxes will be greatly facilitated if robust relationships between flux components and remotely sensed factors are established. Long-term measurements at five Northern Great Plains locations were used to obtain relationships between CO2 fluxes and photosynthetically active radiation (Q), other on-site factors, and Normalized Difference Vegetation Index (NDVI) from the SPOT VEGETATION data set.

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Jalapeño Pepper Cultivar Evaluation, Northern Indiana, 2005, Elizabeth T. Maynard Jan 2005

Jalapeño Pepper Cultivar Evaluation, Northern Indiana, 2005, Elizabeth T. Maynard

Purdue Fruit and Vegetable Research Reports

The USDA Agriculture Census for 2002 reported 355 acres of chile peppers, including jalapeños, grown in Indiana. Almost half of the reported acreage is in Lake Co. Based on conversations with Indiana producers, market criteria for jalapeños differ greatly depending on the ultimate consumer. Many major wholesale buyers prefer large peppers with no checking, or cracks. Markets strongly influenced by people of Mexican heritage prefer large, hot, peppers that are cracked when mature. Anthocyanin development is undesirable in both markets. Producers look for varieties that yield large quantities of high quality peppers, and are easily harvested. This paper reports on …

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Jalapeño Pepper Cultivar Evaluation, Northern Indiana, 2005, Elizabeth T. Maynard Jan 2005

Jalapeño Pepper Cultivar Evaluation, Northern Indiana, 2005, Elizabeth T. Maynard

Midwest Vegetable Trial Reports

The USDA Agriculture Census for 2002 reported 355 acres of chile peppers, including jalapeños, grown in Indiana. Almost half of the reported acreage is in Lake Co. Based on conversations with Indiana producers, market criteria for jalapeños differ greatly depending on the ultimate consumer. Many major wholesale buyers prefer large peppers with no checking, or cracks. Markets strongly influenced by people of Mexican heritage prefer large, hot, peppers that are cracked when mature. Anthocyanin development is undesirable in both markets. Producers look for varieties that yield large quantities of high quality peppers, and are easily harvested. This paper reports on …

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Bell Pepper Cultivar Evaluation, Northern Indiana, 2005, Elizabeth T. Maynard Jan 2005

Bell Pepper Cultivar Evaluation, Northern Indiana, 2005, Elizabeth T. Maynard

Purdue Fruit and Vegetable Research Reports

The USDA Agriculture Census for 2002 reported 225 acres of bell peppers grown in Indiana. Production is scattered across the state, with greater concentrations of farms in northern counties. Wholesale prices are highest for large, blocky peppers. Eight bell pepper cultivars were evaluated at the Pinney-Purdue Ag Center in Wanatah, Indiana. Characteristics of interest included yield, and fruit quality, size and shape.

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Fresh Market Tomato Cultivar Evaluation For Northern Indiana, 2005, Elizabeth T. Maynard Jan 2005

Fresh Market Tomato Cultivar Evaluation For Northern Indiana, 2005, Elizabeth T. Maynard

Purdue Fruit and Vegetable Research Reports

The Indiana Agricultural Statistics Service reported that tomatoes for fresh market sales were harvested from 1,700 acres in Indiana in 2004 and had a total value of $21 million. Tomato fields are located throughout the state. Traditional wholesale buyers look for a large, firm, round tomato that will be red when ripe. Tomato growers are interested in identifying cultivars that show resistance to common foliar diseases like early blight and bacterial spot. Eleven semideterminate large-fruited red tomato varieties were evaluated in a replicated trial at the Pinney-Purdue Agricultural Center in Wanatah, Indiana. Four indeterminate varieties reported to be resistant to …

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Supersweet And Augmented Sweet Corn Cultivar Evaluation For Northern Indiana, 2004, Elizabeth T. Maynard Jan 2005

Supersweet And Augmented Sweet Corn Cultivar Evaluation For Northern Indiana, 2004, Elizabeth T. Maynard

Purdue Fruit and Vegetable Research Reports

This paper reports on nineteen sweet corn cultivars including sh2 and augmented sh2 genetics that were evaluated at the Pinney-Purdue Ag Center, Wanatah, IN.

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Jalapeño Pepper Cultivar Evaluation, Northern Indiana, 2004, Elizabeth T. Maynard Jan 2005

Jalapeño Pepper Cultivar Evaluation, Northern Indiana, 2004, Elizabeth T. Maynard

Purdue Fruit and Vegetable Research Reports

This paper reports on twelve jalapeño pepper cultivars were evaluated at the Pinney-Purdue Ag Center in Wanatah, Indiana. Characteristics of interest included yield, and fruit size and shape, wall thickness, and plant size.

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Sugar-Enhanced Sweet Corn Cultivar Evaluation For Northern Indiana, 2005, Elizabeth T. Maynard Jan 2005

Sugar-Enhanced Sweet Corn Cultivar Evaluation For Northern Indiana, 2005, Elizabeth T. Maynard

Purdue Fruit and Vegetable Research Reports

The Indiana Agricultural Statistics Service reported sweet corn for fresh market sales was harvested from 5,400 acres in Indiana in 2004 and had a total value of $11 million. Sweet corn fields are located throughout the state. In Northern Indiana bicolor corn is most commonly grown. Varieties with improved eating quality are of interest to both producers and consumers. Producers are also interested in yield, ear size and appearance, and agronomic characteristics. This paper reports on twenty sweet corn cultivars with homozygous se or mixed se and sh2 genetics that were evaluated at the Pinney-Purdue Ag Center, Wanatah, IN.

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Sugar-Enhanced Sweet Corn Cultivar Evaluation For Northern Indiana, 2004, Elizabeth T. Maynard Jan 2005

Sugar-Enhanced Sweet Corn Cultivar Evaluation For Northern Indiana, 2004, Elizabeth T. Maynard

Midwest Vegetable Trial Reports

This paper reports on thirty-one sweet corn cultivars including homozygous se and mixed se and sh2 genetics that were evaluated at the Pinney-Purdue Ag Center, Wanatah, IN.

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Sugar-Enhanced Sweet Corn Cultivar Evaluation For Northern Indiana, 2005, Elizabeth T. Maynard Jan 2005

Sugar-Enhanced Sweet Corn Cultivar Evaluation For Northern Indiana, 2005, Elizabeth T. Maynard

Midwest Vegetable Trial Reports

The Indiana Agricultural Statistics Service reported sweet corn for fresh market sales was harvested from 5,400 acres in Indiana in 2004 and had a total value of $11 million. Sweet corn fields are located throughout the state. In Northern Indiana bicolor corn is most commonly grown. Varieties with improved eating quality are of interest to both producers and consumers. Producers are also interested in yield, ear size and appearance, and agronomic characteristics. This paper reports on twenty sweet corn cultivars with homozygous se or mixed se and sh2 genetics that were evaluated at the Pinney-Purdue Ag Center, Wanatah, IN.

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Pumpkin Cultivar Evaluation, Indiana 2005, Elizabeth T. Maynard Jan 2005

Pumpkin Cultivar Evaluation, Indiana 2005, Elizabeth T. Maynard

Midwest Vegetable Trial Reports

Pumpkins grown for Halloween and other decorative purposes continue to be an important crop for many Midwestern vegetable farmers. Breeders are developing new varieties with improved appearance and disease resistance or tolerance. This paper reports on yield and fruit size of nineteen varieties evaluated at the Pinney-Purdue Ag Center in Wanatah, Indiana.

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Bell Pepper Cultivar Evaluation, Northern Indiana, 2004, Elizabeth T. Maynard Jan 2005

Bell Pepper Cultivar Evaluation, Northern Indiana, 2004, Elizabeth T. Maynard

Midwest Vegetable Trial Reports

This paper reports on twelve bell pepper cultivars that were evaluated at the Pinney-Purdue Ag Center in Wanatah, Indiana. Characteristics of interest included yield, and fruit quality, size and shape.

Go to article

Pumpkin Cultivar Evaluation, Indiana 2004, Elizabeth T. Maynard Jan 2005

Pumpkin Cultivar Evaluation, Indiana 2004, Elizabeth T. Maynard

Midwest Vegetable Trial Reports

Pumpkins grown for Halloween and other decorative purposes continue to be an important crop for many Midwestern vegetable farmers. Breeders are developing new varieties with improved appearance and disease resistance or tolerance. Trials were conducted at Meigs Horticultural Facility, Throckmorton Purdue Ag Center in Tippecanoe County, Indiana, and on farms in Allen and Whitley Counties in northeastern Indiana to evaluate new cultivars and lines and compare them with older cultivars. This paper reports on yield and fruit size of 31 varieties grown at one or more of the trial locations.

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Fresh Market Tomato Cultivar Evaluation For Northern Indiana, 2004, Elizabeth T. Maynard Jan 2005

Fresh Market Tomato Cultivar Evaluation For Northern Indiana, 2004, Elizabeth T. Maynard

Midwest Vegetable Trial Reports

This paper reports on twelve fresh market tomato varieties that were evaluated in a replicated trial at the Pinney-Purdue Agricultural Center in Wanatah, Indiana, and six varieties that were observed in unreplicated plots. Characteristics of interest include marketable and total yield and average fruit size.

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Supersweet And Augmented Sweet Corn Cultivar Evaluation For Northern Indiana, 2004, Elizabeth T. Maynard Jan 2005

Supersweet And Augmented Sweet Corn Cultivar Evaluation For Northern Indiana, 2004, Elizabeth T. Maynard

Midwest Vegetable Trial Reports

This paper reports on nineteen sweet corn cultivars including sh2 and augmented sh2 genetics that were evaluated at the Pinney-Purdue Ag Center, Wanatah, IN.

Go to article

Bell Pepper Cultivar Evaluation, Northern Indiana, 2005, Elizabeth T. Maynard Jan 2005

Bell Pepper Cultivar Evaluation, Northern Indiana, 2005, Elizabeth T. Maynard

Midwest Vegetable Trial Reports

The USDA Agriculture Census for 2002 reported 225 acres of bell peppers grown in Indiana. Production is scattered across the state, with greater concentrations of farms in northern counties. Wholesale prices are highest for large, blocky peppers. Eight bell pepper cultivars were evaluated at the Pinney-Purdue Ag Center in Wanatah, Indiana. Characteristics of interest included yield, and fruit quality, size and shape.

Go to article

Supersweet Sweet Corn Cultivar Evaluation For Northern Indiana, 2005, Elizabeth T. Maynard Jan 2005

Supersweet Sweet Corn Cultivar Evaluation For Northern Indiana, 2005, Elizabeth T. Maynard

Midwest Vegetable Trial Reports

The Indiana Agricultural Statistics Service reports that sweet corn for fresh market sales was harvested from 5,400 acres in Indiana in 2004 and had a total value of $11 million. Sweet corn fields are located throughout the state. In Northern Indiana bicolor corn is most commonly grown. Varieties with improved eating quality are of interest to both producers and consumers. Producers are also interested in yield, ear size and appearance, and agronomic characteristics. This paper reports on twenty sh2 sweet corn cultivars known as ‘supersweet’ or ‘enhanced’ or ‘augmented supersweet’ that were evaluated at the Pinney-Purdue Ag Center, Wanatah, IN.

Go to article

Fresh Market Tomato Cultivar Evaluation For Northern Indiana, 2005, Elizabeth T. Maynard Jan 2005

Fresh Market Tomato Cultivar Evaluation For Northern Indiana, 2005, Elizabeth T. Maynard

Midwest Vegetable Trial Reports

The Indiana Agricultural Statistics Service reported that tomatoes for fresh market sales were harvested from 1,700 acres in Indiana in 2004 and had a total value of $21 million. Tomato fields are located throughout the state. Traditional wholesale buyers look for a large, firm, round tomato that will be red when ripe. Tomato growers are interested in identifying cultivars that show resistance to common foliar diseases like early blight and bacterial spot. Eleven semideterminate large-fruited red tomato varieties were evaluated in a replicated trial at the Pinney-Purdue Agricultural Center in Wanatah, Indiana. Four indeterminate varieties reported to be resistant to …

Go to article

Pumpkin Cultivar Evaluation, Indiana 2005, Elizabeth T. Maynard Jan 2005

Pumpkin Cultivar Evaluation, Indiana 2005, Elizabeth T. Maynard

Purdue Fruit and Vegetable Research Reports

Pumpkins grown for Halloween and other decorative purposes continue to be an important crop for many Midwestern vegetable farmers. Breeders are developing new varieties with improved appearance and disease resistance or tolerance. This paper reports on yield and fruit size of nineteen varieties evaluated at the Pinney-Purdue Ag Center in Wanatah, Indiana.

Go to article

Bell Pepper Cultivar Evaluation, Northern Indiana, 2004, Elizabeth T. Maynard Jan 2005

Bell Pepper Cultivar Evaluation, Northern Indiana, 2004, Elizabeth T. Maynard

Purdue Fruit and Vegetable Research Reports

This paper reports on twelve bell pepper cultivars that were evaluated at the Pinney-Purdue Ag Center in Wanatah, Indiana. Characteristics of interest included yield, and fruit quality, size and shape.

Go to article

Pumpkin Cultivar Evaluation, Indiana 2004, Elizabeth T. Maynard Jan 2005

Pumpkin Cultivar Evaluation, Indiana 2004, Elizabeth T. Maynard

Purdue Fruit and Vegetable Research Reports

Pumpkins grown for Halloween and other decorative purposes continue to be an important crop for many Midwestern vegetable farmers. Breeders are developing new varieties with improved appearance and disease resistance or tolerance. Trials were conducted at Meigs Horticultural Facility, Throckmorton Purdue Ag Center in Tippecanoe County, Indiana, and on farms in Allen and Whitley Counties in northeastern Indiana to evaluate new cultivars and lines and compare them with older cultivars. This paper reports on yield and fruit size of 31 varieties grown at one or more of the trial locations.

Go to article

Sugar-Enhanced Sweet Corn Cultivar Evaluation For Northern Indiana, 2004, Elizabeth T. Maynard Jan 2005

Sugar-Enhanced Sweet Corn Cultivar Evaluation For Northern Indiana, 2004, Elizabeth T. Maynard

Purdue Fruit and Vegetable Research Reports

This paper reports on thirty-one sweet corn cultivars including homozygous se and mixed se and sh2 genetics that were evaluated at the Pinney-Purdue Ag Center, Wanatah, IN.

Go to article

Fresh Market Tomato Cultivar Evaluation For Northern Indiana, 2004, Elizabeth T. Maynard Jan 2005

Fresh Market Tomato Cultivar Evaluation For Northern Indiana, 2004, Elizabeth T. Maynard

Purdue Fruit and Vegetable Research Reports

This paper reports on twelve fresh market tomato varieties that were evaluated in a replicated trial at the Pinney-Purdue Agricultural Center in Wanatah, Indiana, and six varieties that were observed in unreplicated plots. Characteristics of interest include marketable and total yield and average fruit size.

Go to article

Evaluation Of Pumpkin Cultivars No-Till Direct-Seeded And No-Till Transplanted Into Wheat Stubble, Indiana 2005, Elizabeth T. Maynard Jan 2005

Evaluation Of Pumpkin Cultivars No-Till Direct-Seeded And No-Till Transplanted Into Wheat Stubble, Indiana 2005, Elizabeth T. Maynard

Purdue Fruit and Vegetable Research Reports

Double-cropping pumpkins after wheat provides an opportunity to harvest a high-value crop off of land that might otherwise remain uncropped. In northern Indiana, many jack-o- lantern pumpkin cultivars may not mature quickly enough to produce a crop when planted in mid-July. This paper reports yield and fruit size of five cultivars or lines direct-seeded or transplanted into wheat stubble at the Pinney-Purdue Ag Center in Wanatah, Indiana.

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Evaluation Of Pumpkin Cultivars No-Till Direct-Seeded And No-Till Transplanted Into Wheat Stubble, Indiana 2004, Elizabeth T. Maynard Jan 2005

Evaluation Of Pumpkin Cultivars No-Till Direct-Seeded And No-Till Transplanted Into Wheat Stubble, Indiana 2004, Elizabeth T. Maynard

Purdue Fruit and Vegetable Research Reports

Double-cropping pumpkins after wheat provides an opportunity to harvest a high-value crop off of land that might otherwise remain uncropped. In northern Indiana, many jacko- lantern pumpkin cultivars may not mature quickly enough to produce a crop when planted in mid-July. This project compared yield and fruit size of eight cultivars or lines when they were either direct-seeded or transplanted into wheat stubble.

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Supersweet Sweet Corn Cultivar Evaluation For Northern Indiana, 2005, Elizabeth T. Maynard Jan 2005

Supersweet Sweet Corn Cultivar Evaluation For Northern Indiana, 2005, Elizabeth T. Maynard

Purdue Fruit and Vegetable Research Reports

The Indiana Agricultural Statistics Service reports that sweet corn for fresh market sales was harvested from 5,400 acres in Indiana in 2004 and had a total value of $11 million. Sweet corn fields are located throughout the state. In Northern Indiana bicolor corn is most commonly grown. Varieties with improved eating quality are of interest to both producers and consumers. Producers are also interested in yield, ear size and appearance, and agronomic characteristics. This paper reports on twenty sh2 sweet corn cultivars known as ‘supersweet’ or ‘enhanced’ or ‘augmented supersweet’ that were evaluated at the Pinney-Purdue Ag Center, Wanatah, IN.

Go to article

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