scholarly journals Control of Potato Leafhopper on Potatoes Using Reduced Ratesl of Insecticides, 1997

1998 ◽  
Vol 23 (1) ◽  
pp. 137-137
Author(s):  
Robert A. Suranyi ◽  
Craig A. Longtine ◽  
David W. Ragsdale ◽  
Edward B. Radcliffe
Keyword(s):  
Late Blight ◽  
Post Treatment ◽  
Potato Leafhopper ◽  
Plant Spacing ◽  
University Of Minnesota ◽  
Agricultural Experiment Station ◽  
Minnesota Agricultural Experiment Station ◽  
Agricultural Experiment ◽  
Pre Treatment ◽  
The University

Abstract Potatoes were planted 19 May at the University of Minnesota Agricultural Experiment Station, Rosemount, MN. Plant spacing was 36 inches between rows and 12 inches between plants within rows. Treatments were arranged in a RCB design with 3 replications. Plots were 8 rows wide by 40 ft long, separated by 12 ft of al-falfa borders on all sides to enhance PLH population. Thirty-five midplant leaves were sampled from the center four rows of each plot. Pre-treatment counts and treatment applications were made 29 Jul. All treatments were applied with a tractor-mounted Brittonya boom sprayer delivering 45 gpa at 90 psi with 3 nozzles per row. Post-treatment counts of PLH nymphs were made 30 Jul, 24 hours after treatment. Early and late blight were controlled by eight applications of chlorothalonil. Analyses of variance were calculated following transformation of the data using logl0(x).

scholarly journals Control Of Green Peach Aphid On Potato, 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 172-172
Author(s):  
Robert A. Suranyi ◽  
Edward B. Radcliffe ◽  
Patricia Cordova
Keyword(s):  
Late Blight ◽  
Green Peach Aphid ◽  
Potato Leafhopper ◽  
University Of Minnesota ◽  
Agricultural Experiment Station ◽  
Egg Hatch ◽  
Potato Beetle ◽  
Agricultural Experiment ◽  
The University ◽  
Spray Applications

Abstract Potatoes were planted 15 May at the University of Minnesota Agricultural Experiment Station, Rosemount, MN. Plots were 1 row, 25 ft long, and separated from other plots by 6 ft of fallow. Treatments were arranged in a RCB design with 4 replications. Treatments for GPA control were applied on 9 Aug, except for Admire 2F which was applied in-furrow at planting prior to closing the seed bed. All spray applications for GPA were made using a CO2 pressurized sprayer fitted with a Teejet 8003-E flat fan nozzle, delivering 60 gal/acre at 35 psi. Late blight control was achieved by 5 spray applications of Bravo 500 (1 pt/acre) on 28 Jun; 7, 13 and 29 July; and 8 Aug, and 3 applications of Ridomil/Bravo 81WP (1 lb/acre) on 20 Jul; 2 and 18 Aug. One application of Novodor (3 qts/acre) was targeted against Colorado potato beetle (CPB) at 30% egg hatch on 17 June. Asana 0.66XL (9.6 fl oz/acre) applications were applied on 22 and 28 June; 12 and 29 Jul to enhance GPA populations for the purpose of this test. Asana treatments also controlled CPB and potato leafhopper. Samples of 10 lower leaves were taken from the center plants in each plot and GPA were counted. GPA counts were made on 10, 17, and 24 Aug; 1, 7 and 14 DAT respectively.

scholarly journals Evaluation of Fulfill for Control of Cotton Aphids, 1996

1998 ◽  
Vol 23 (1) ◽  
pp. 243-243
Author(s):  
M. N. Parajulee ◽  
J. E. Slosser ◽  
G. B. Idol
Keyword(s):  
Experimental Design ◽  
Post Treatment ◽  
Lower Half ◽  
Agricultural Experiment Station ◽  
Texas Agricultural Experiment Station ◽  
Experiment Station ◽  
Agricultural Experiment ◽  
Pre Treatment

Abstract Cotton was planted 20 Jun in 40-inch rows (8-row X 75-ft plots) at the Texas Agricultural Experiment Station at Chillicothe. The experimental design was a randomized complete block, with 5 insecticide treat-ments and a check replicated 4 times. Cotton was inspected for aphids on 2, 9, and 15 Aug. Ten leaves from the top half and 10 leaves from the lower half of plants from each plot were examined, and the numbers of aphids were recorded on each inspection date. Pre-treatment counts were made and the insecticide treatments were applied on 19 Aug. Treatments were applied with a John Deere High Cycle 6000 sprayer. Spray drops were used to provide three nozzles per row, delivering 9.7 gpa at 40 psi. Post-treatment aphid counts were made at 4, 6, and 13 DAT.

scholarly journals Control of Lepidopteran Pests in Cabbage, 1996

1997 ◽  
Vol 22 (1) ◽  
pp. 87-87
Author(s):  
D. W. Bartels ◽  
R. L. Hines ◽  
W. D. Hutchison
Keyword(s):  
Rating Scale ◽  
Feeding Damage ◽  
University Of Minnesota ◽  
Agricultural Experiment Station ◽  
Experiment Station ◽  
Lepidopteran Pests ◽  
Agricultural Experiment ◽  
Bare Root ◽  
The University

Abstract This study was conducted at the University of Minnesota Rosemount Agricultural Experiment Station. Cabbage was transplanted bare-root on 28 Jun. Plots consisted of two 25 ft (7.6 m) rows on 40 inch (1.0 m) centers with plants spaced 13 inches (0.33 m) apart. Ten ft (3.0 m) borders and 10 ft (3.0 m) alleys separated plots. Treatments were arranged in a RCB design with 4 replications. Treatment applications were initiated during the 9-12 true leave stage, before precupping. Treatments were applied 26 and 31 Jul, 08, 14 and 21 Aug using a moderate-clearance Spirit sprayer with 3 TX-10 hollowcone nozzles (1 overhead and 2 drop nozzles) per row. The sprayer was calibrated to deliver 27 gpa (252.5 liters/ha) at 47 psi (3.3 kg/cm2) and 3 mph (4.8 km/hr). Bond sticker/extender was added to all treatments (except Confirm treatments) at a rate of 0.10 fl oz/gal (0.8 ml/liter). Counts were taken from 5 heads per plot on 15 Aug and 10 heads per plot on 26 Aug. Ten heads per plots were evaluated for feeding damage on 30 Aug using Green’s rating scale (J. Econ. Entomol. 1969 62:4 798-800): 1 = no feeding damage; 2 = minor feeding damage on the wrapper leaves (1 % eaten); 3 = moderate feeding damage on the wrapper leaves (2–5% eaten) with no head damage; 4 = moderate feeding damage on the wrapper leaves (6-10% eaten) and minor feeding scars on the head; 5 = moderate to heavy feeding on the wrapper leaves (11-30% eaten) and moderate feeding scars on the head; 6 = >30% of the wrapper leaves eaten and numerous feeding scars on the head.

scholarly journals Use of Neem-Based and Bacillus Thuringiensis Foliar Sprays to Control Colorado Potato Beetle on Potatoes, 1993

1994 ◽  
Vol 19 (1) ◽  
pp. 133-133
Author(s):  
John Speese
Keyword(s):  
Block Design ◽  
Potato Leafhopper ◽  
Plant Spacing ◽  
Eastern Shore ◽  
Agricultural Experiment Station ◽  
Hollow Cone ◽  
Potato Beetle ◽  
Randomized Complete Block Design ◽  
Compressed Gas ◽  
Agricultural Experiment

Abstract Potatoes were planted on 15 Apr at the Eastern Shore Agricultural Experiment Station, Painter, VA. Each plot consisted of a 25 ft row bordered on each side by an untreated guard row, replicated 4 times in a randomized complete block design. Plant spacing was 10 inches between plants with 36 inches between rows. Sprays to control CPB were applied on the dates indicated in the table. On 15 and 22 Jun, the Novodor treatment was sprayed with Asana XL (0.04 lb AI) due to the presence of CPB large larvae and Fl adults. From 15 Jun on, Cygon 400 (0.25 lb AI) was added to the ATI 720 treatments to control potato leafhopper (Empoasca fabae). Sprays were applied with a propane compressed gas backpack sprayer using a 3 nozzle hollow cone (D4—5) boom and delivering 60 gal water/acre at 40 psi.

scholarly journals Head Cabbage, Microbial Control of Cutworm, Webworm, Cluster Caterpillar and Gardenlooper, 1993

1994 ◽  
Vol 19 (1) ◽  
pp. 66-66
Author(s):  
R. Muniappan ◽  
I.U. Silva-Krott
Keyword(s):  
Block Design ◽  
Microbial Control ◽  
Bare Soil ◽  
Agricultural Experiment Station ◽  
Experiment Station ◽  
Randomized Complete Block Design ◽  
Agricultural Experiment ◽  
The University ◽  
Head Cabbage ◽  
University Of Guam

Abstract The experiment was conducted at the Agricultural Experiment Station of the University of Guam, at the Inarajan site. The experiment was a randomized complete block design with four treatments and four replications. Each treatment consisted of four rows of head cabbage with eight plants on each row. Replications were separated by 60 cm of bare soil. Cabbage seedlings were planted 2 Mar 1993

scholarly journals Evaluation of a Swine Line Developed at the Agricultural Experiment Station of the University of Puerto Rico

1969 ◽  
Vol 51 (1) ◽  
pp. 4-21
Author(s):  
Ismael Carlo ◽  
C. L. Arcelay
Keyword(s):  
Puerto Rico ◽  
Feed Efficiency ◽  
University Of Puerto Rico ◽  
Agricultural Experiment Station ◽  
Multiple Test ◽  
Weaning Age ◽  
Overall Evaluation ◽  
Agricultural Experiment ◽  
Fat Thickness ◽  
The University

The performance of the pigs of the 3/4 Duroc X 1/4 English Large Black Landrace line developed by the Station was compared with the performance of some imported animals. These imported pigs were from the Duroc, the Yorkshire, and the Hampshire breeds. The comparison and the evaluation of the animals was based on preweaning and postweaning characters. The preweaning characters considered were the number of pigs at farrowing, the number at 21 days, and at weaning age. The rate of gain, the feed efficiency, the back-fat thickness corrected to 200 pounds, and carcass evaluation were considered as postweaning characters. All the data obtained were submitted to analysis of variance and where the F values were significant, they were subjected to a Duncan Multiple Test to determine significance among the means. The overall evaluation of both preweaning and postweaning characters showed that the animals of the 3/4 Duroc X 1/4 English Large Black Landrace line of pigs were as good as any of the animals of the imported breeds with which they were compared, with the possible exception of the carcass evaluation, where the imported breeds gave somewhat better results. They were especially good in the number of pigs weaned, as well as in the weight at weaning time and in rate of gain.

scholarly journals Effect of plant spacing on growth and yield of winged bean

1969 ◽  
Vol 72 (2) ◽  
pp. 273-276
Author(s):  
C. T. Lee
Keyword(s):  
Winged Bean ◽  
Growth And Yield ◽  
Row Spacing ◽  
Plant Spacing ◽  
Agricultural Experiment Station ◽  
Psophocarpus Tetragonolobus ◽  
Experiment Station ◽  
Agricultural Experiment

The effect of plant spacing on growth and yield of winged bean (Psophocarpus tetragonolobus (L.) D.C.) cultivar Chimbu was evaluated at Guam Agricultural Experiment Station. Plant spacings included 12.5, 25.0, 50.0 and 75.0 cm within-row at the same between-row spacing of 1.22 m (equivalent to 13,333, 20,000, 40,000 and 80,000 plants/ha, respectively). Days to first flower in closest spacing (12.5 cm) was significantly delayed 8 days longer than that from widest spacing (75 cm). Wider spacings of 50 and 75 cm produced higher numbers of basal branches (3.6 and 3.8, respectively) and green pods per plant (65.3 and 83.3, respectively) than closer spacings of 12.5 and 25 cm. For yields both of green pod and dry seed the optimum spacings were plant spacings of 50 and 75 cm. The result of higher yields indicated that cultivar Chimbu compensated for wider spacings by producing higher numbers of basal branches and green pods and larger green pods than at closer spacings.

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