scholarly journals Insecticide Efficacy Against Dbm, 1995

1997 ◽  
Vol 22 (1) ◽  
pp. 97-98
Author(s):  
R. F. L Mau ◽  
L. R. Gusukuma-Minuto ◽  
R. S. Shimabuku ◽  
K. W. Dunster
Keyword(s):  
Field Size ◽  
Row Spacing ◽  
Research Station ◽  
Plant Spacing ◽  
Total Field ◽  
Hollow Cone ◽  
Single Row ◽  
Insecticide Efficacy ◽  
Set Up

Abstract Three insecticides were evaluated at the Kula Research Station, Maui Agricultural Park, from July to September. The field was set up in a RCB design with five treatments and four replications (blocks). Each treatment plot consisted of a single row of cabbage planted at 18 inch between plant spacing. Treatment plots in each block were separated by a 24 inch row spacing. Blocks were separated by a 36 inch spacing. Total field size was 68 ft. by 70 ft. Treatments were applied using a CO2 backpack sprayer set at 60 psi with an output of 100 gpa. One hollow cone nozzle (TX-26) was used per row. The first treatment was applied one week after transplanting into the field on 18 Jul. Subsequently, six applications were made weekly until the week before harvest on the following dates: 25 Jul, 1, 8, 15, 22, and 29 Aug.

scholarly journals Evaluation of an Igr Insecticide, Rh-2485, for Control of Dbm and other Caterpillars on Head Cabbage, 1996

1997 ◽  
Vol 22 (1) ◽  
pp. 104-105
Author(s):  
R.F.L. Mau ◽  
L. R. Gusukuma-Minuto ◽  
R. S. Shimabuku
Keyword(s):  
Bacillus Thuringiensis ◽  
Resistance Management ◽  
Research Station ◽  
Plant Spacing ◽  
Hollow Cone ◽  
Single Row ◽  
Management Protocol ◽  
Set Up ◽  
The University ◽  
Head Cabbage

Abstract The insecticides were evaluated at the Kula Research Station, Maui Agricultural Park, from April to June. The field was set up in a RCB design with five treatments and four replications (blocks). Each treatment plot consisted of a single row of cabbage planted at 18 in. between plant spacing. Treatments were applied using a CO2 backpack sprayer set at 60 psi with an output of 100 gpa. One hollow cone nozzle (TX-26) was used per row The first treatment was applied five days after transplanting into the field on 23 Apr. Subsequently, six weekly applications were made until the week before harvest on the following dates: 30 Apr, 7, 14, 21, 28 May, 4 Jun. The treated check involved application of Bacillus thuringiensis aizawai (BTA) or Proclaim, using the University of Hawaii DBM resistance management protocol. The BTA product used was Mattach which was applied at 2.0 qt/acre on 23, 30 Apr, 7, 14 May. Proclaim 0.15EC was applied at 6.0 oz/acre on 21 and 28 May.

scholarly journals Field Evaluation of Fipronil for Dbm Control, 1996

1997 ◽  
Vol 22 (1) ◽  
pp. 101-102
Author(s):  
R.F.L. Mau ◽  
L. R. Gusukuma-Minuto ◽  
R. S. Shimabuku
Keyword(s):  
Specific Treatment ◽  
Field Evaluation ◽  
Row Spacing ◽  
Research Station ◽  
Plant Spacing ◽  
Set Up

Abstract The insecticides were evaluated at the Kula Research Station, Maui Agricultural Park, from June to August. The field was set up in a RCB design with six treatments and four replications (blocks). Each treatment plot measured 70 ft by 7.5 ft. It consisted of four rows of cabbage on 36 in. centers and 18 in. in-row spacing. Adjacent rows were offset to allow equidistant plant spacing between rows. Treatments were applied using a tractor mounted with a PTO driven spray pump equipped with a 30 ft. boom. The boom was set with three banks nozzles that coincided with row spacing. Each group of nozzles had its own line from the main tank, therefore, spray output to specific treatment plots could be easily controlled by the sprayer operator. Treatments were applied at 45 psi with an output of 125 gpa. One TJ 60-8006 nozzle was used per row. The first treatment was made on 2 Jul, 1 day after transplanting. Subsequent applications were made on the following dates: 8, 16, 23, 30 Jul, 6, 13 Aug.

scholarly journals Plant Spatial Arrangement Affects Growth, Yield, and Pod Distribution of Cayenne Peppers

HortScience ◽  
1994 ◽  
Vol 29 (3) ◽  
pp. 149-151 ◽  
Author(s):  
Dennis R. Decoteau ◽  
Heather A. Hatt Graham
Keyword(s):  
Growth Yield ◽  
Spatial Arrangement ◽  
Plant Population ◽  
Row Spacing ◽  
Plant Canopy ◽  
Plant Spacing ◽  
Population Densities ◽  
Higher Plant ◽  
Single Row ◽  
Pepper Plants

The effect of planting population density (as a function of in-row plant spacing and number of rows per bed) on the growth, yield, and pod distribution of cayenne pepper (Capsicum annuum var. annuum L. cv. Carolina Cayenne) was investigated in a 2-year study. In 1988, 15 -, 30-, 45-, and 60-cm in-row spacings in a single row were evaluated, and in 198915 -,30-, and 60-cm in-row spacings in single and double rows were evaluated. Plant population densities at these respective spacings ranged from≈ 11,100 to 44,400 and 11,100 to 88,900 plants/ha. In 1988, pepper plants grown at the highest density (15-cm in-row spacing, 44,400 plant/ha) produced less fruit per plant but more fruit per hectare than those grown in lower densities. In 1989, yields with either a 15-cm in-row spacing in a single row or a 30-cm in-row spacing in double rows (both with 44,400 plants/ha) were higher than in the others. In general, less fruit were located in the lower part of the plant canopy when planted in higher plant population densities.

scholarly journals Foliar Sprays to Control Insects in Fall Peppers, 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 136-137
Author(s):  
John Speese
Keyword(s):  
Agricultural Research ◽  
Evaluation Criteria ◽  
Row Spacing ◽  
Plant Spacing ◽  
Eastern Shore ◽  
Hollow Cone ◽  
Foliar Sprays ◽  
Marketable Fruit ◽  
Extension Center

Abstract Peppers were transplanted on 31 Jul at the Eastern Shore Agricultural Research and Extension Center, Painter, VA. Each plot consisted of two 25ft long rows with 3ft between row spacing and 1ft between plant spacing. Each plot was bordered on each side by an untreated guard row and replicated 4 times in a RCB design. Treatments were applied on the dates indicated in the table with a backpack sprayer using 3 hollow cone nozzles/row and delivering 60 gal water/acre at 40 psi. Evaluation criteria consisted of hand-harvest of marketable fruit on 10 healthy, uniform-sized plants/row (.00062 acre) and GPA counts on 5 randomly picked leaves/plot on 06 Oct. Harvesting was done in this manner due to uneven stands in some plots due to the drought.

scholarly journals Evaluation of Selected Bacillus Thuringiensis Insecticides for Control of Soybean Looper in North Louisiana, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 238-238 ◽  
Author(s):  
Rosanne N. Mascarenhas ◽  
Alan T. Wier ◽  
David J. Boethel ◽  
P. Scott Lingren ◽  
B. Rogers Leonard
Keyword(s):  
Block Design ◽  
Experimental Period ◽  
Compressed Air ◽  
Row Spacing ◽  
Research Station ◽  
Hollow Cone ◽  
Randomized Complete Block Design ◽  
Period Data ◽  
Soybean Looper ◽  
North Louisiana

Abstract A field study was conducted at the Macon Ridge Branch, Northeast Research Station, located near Winnsboro (Franklin Parish), Louisiana, to evaluate the efficacy of several B. thuringiensis insecticides for soybean looper control. Test plots were 50 ft long by 5 rows with a 40 inch row spacing and were arranged in a randomized complete block design with four replications. Insecticides were applied with a tractor and compressed air sprayer calibrated to deliver 10 gpa at 38 psi through TX8 hollow cone nozzles (2 per row). Insecticide treatments were applied to soybeans in the R5 stage of growth (beginning seed) on 25 Aug. Posttreatment counts, consisting of 25 sweeps per plot, were taken with a 15 inch diameter muslin net at 2, 5, and 7 DAT. No rainfall occurred and the plots were not irrigated during the experimental period. Data were analyzed using analysis of variance followed by means separation according to DMRT.

scholarly journals Evaluation of Insecticides for Onion Thrips Control on Dry Onion, 1996

1997 ◽  
Vol 22 (1) ◽  
pp. 145-146
Author(s):  
R. F. L Mau ◽  
L. R. Gusukuma-Minuto ◽  
R. S. Shimabuku
Keyword(s):  
Carbon Dioxide ◽  
Additional Treatment ◽  
Research Station ◽  
Plant Spacing ◽  
Onion Thrips ◽  
Compressed Carbon Dioxide ◽  
Set Up

Abstract The insecticides were evaluated at the Kula Research Station, Maui Agricultural Park, from June to September. The field was set up in a RCB design with six treatments and four replications (blocks). Each treatment plot consisted of four rows of plants planted at 8 in. between-plant spacing. Each row consisted of 45 plants. Seedlings were transplanted into the field on 17 Jun. Treatments were applied using a compressed carbon dioxide sprayer at 60 psi and 100 gpa. Two twin jet nozzles (TJ-6502) were used per two rows. Applications of Warrior at 0.02 and 0.03 lb. (AI)/acre, Lannate, and Ammo were made at 7-day intervals on 16, 23, 30 July, 6, 13, 20 Aug for a total of six applications. An additional treatment of Warrior @ 0.03 lb. (AI)/acre was made when thrips numbers exceeded 3 thrips/plant on 23 Jul, 6 and 20 Aug.

scholarly journals Agronomic Attributes of Five Okra Landraces Selected for Okra Production in Oyi Local Government Area of Anambra State, Nigeria

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
E.E. Okoli
Keyword(s):  
Research Study ◽  
Block Design ◽  
Growth And Yield ◽  
Field Size ◽  
Plant Spacing ◽  
Total Field ◽  
Anambra State ◽  
Significant Difference ◽  
Randomized Complete Block Design ◽  
Seedling Characteristics

A research study on the agronomic attributes of five okra genotypes for Okra production were evaluated for growth and yield at the teaching and research farm of the Department of Crop Science and Horticulture, Faculty of Agriculture, Chukwuemeka Odumegwu Ojukwu University (COOU) Igbariam Anambra state. The experiment was conducted using a randomized complete block design (RCBD) with 4 replications using 3m row plots. The total field size was 187 m2 (0.00187 ha) and a plant spacing of 0.60m × 0.30m was used. There was no significant difference in the treatment means for all the parameter studied, however, result from the seedling characteristics revealed that Nkwelle Okra was the earliest to emerge (4.25 days) while Awkuzu okra was the last to emerge (6.00 days). The experiment showed that Awkuzu okra was earliest to flower at 60.30 days after planting while Nteje Okra was the last to reach 50% flowering at 70.10 days after planting. Awkuzu Okra had the highest number of pods per plant (11.80), pod weight (50.90g) and yield t/ha (0.00005t/ha) while the least was Nteje Okra for number of pods per plants (6.50), pod weight (29.60g) and yield t/ha (0.000029 t/ha). Therefore, a further genetic study was recommended for the studied genotypes to produce hybrid and synthetic cultivar for the production of okra in the study area.

Effect of plant spacing on tea (Camellia sinensis L.) yield at Wollongbar, New South Wales

1992 ◽  
Vol 32 (6) ◽  
pp. 781 ◽  
Author(s):  
T Trochoulias ◽  
EB Dettmann
Keyword(s):  
New South ◽  
Dry Weight ◽  
Row Spacing ◽  
Plant Spacing ◽  
Double Row ◽  
Single Row ◽  
South Wales ◽  
Significant Difference ◽  
Plant Densities ◽  
Total Dry Weight

Tea yields were compared from single-row plots (2 m apart, 63-cm spacing within rows) and double-row plots planted at 2 different row spacings (2 m between row centres, rows 90 cm apart, plant spacing of 83 or 56 cm within rows), giving plant densities of 8 000, 12 000 and 18 000 bushes/ha. Over a 6-year period total dry weight yields from double-row plots (10.70 t/ha) were significantly higher than from single-row plots (8.21 t/ha), but there was no significant difference between yields from double-row plots with different within-row spacing.

Field Evaluation of a Neem and BT Product for DBM Control, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 74-74
Author(s):  
R. F. L. Mau ◽  
L. R. Gusukuma-Minuto ◽  
W. S. Ruggero ◽  
R. S. Shimabuku
Keyword(s):  
Block Design ◽  
Age Groups ◽  
Specific Treatment ◽  
Field Evaluation ◽  
Field Size ◽  
Row Spacing ◽  
Research Station ◽  
Larval Instars ◽  
Randomized Block Design ◽  
Early Larvae

Abstract Insecticides were evaluated at the substation of the Kula Research Station, Maui Agricultural Park from Jun through Aug. The field was set up in a randomized block design with six treatments and four replications (blocks). Each treatment plot measured 70 ft. by 4.5 ft. It consisted of four rows of cabbage in 2 beds on 36 inch centers and 18 inch in-row spacing. Adjacent rows were offset to allow equidistant plant spacing between rows. Treatment plots in each block were separated by a 4.5 ft. border. Blocks were separated by a 10 ft. border that allowed sprayer access. Total field size was 150 ft. by 109 ft. From 1 to 8 treatments were applied on 29 Jun, 5, 12, 19, 26 Jul, and 2, 9, 16 Aug using a tractor mounted with a PTO driven spray pump equipped with a 30 ft. boom. The boom was set with three banks of hollow cone (TX-26, Spraying Systems) nozzles that coincided with row spacing. Each group of nozzles had its own line from the main tank, therefore, spray output to specific treatment plots could be easily controlled. Sprays were applied at 100 psi at a rate of 150 gpa on a weekly basis from one day after transplanting into the field to one week before harvest. A pretreatment count was made on 28 Jun and post treatment surveys were conducted on 11, 25 Jul, 8 or 22 Aug. Ten plants were randomly selected from the two center rows and removed for examination of insects. DBM immatures were counted in separate age groups; early larvae, late larvae, and pupae. Early larvae were those in the first two larval instars. They were identified by their small size and the occurrence of black colored head capsules. Late larvae were those in the last two larval instars. They were identified by their larger size and the occurrence of green or brown head capsules. Pupae were easily identified by their net like cocoon.

scholarly journals Field Evaluation of Bio-Rational Insecticides for Controlling DBM, 1993

1995 ◽  
Vol 20 (1) ◽  
pp. 75-75
Author(s):  
R. F. L. Mau ◽  
L. R. Gusukuma-Minuto ◽  
W. S. Ruggero ◽  
M. H. Kijima
Keyword(s):  
Block Design ◽  
Age Groups ◽  
Specific Treatment ◽  
Field Size ◽  
Row Spacing ◽  
Research Station ◽  
Weekly Basis ◽  
Solid Cone ◽  
Larval Instars ◽  
Early Larvae

Abstract Insecticides were evaluated at the substation of the Kula Research Station, Maui Agricultural Park from Aug through Oct. The field was set up in a randomized block design with five treatments and four replications (blocks). Each treatment plot measured 70 ft. by 7.5 ft. It consisted of six rows of cabbage in 3 beds on 36 inch centers and 18 inch in-row spacing. Adjacent rows were offset to allow equidistant plant spacing between rows. Treatment plots in each block were separated by a 3 ft. border. Blocks were separated by a 10 ft. border that allowed sprayer access. Total field size was 150 ft. by 109 ft. From 1 to 6 treatments were applied on 1, 8, 15, 22, 29 Sep and 6 Oct using a diaphragm pump, hydraulic jet agitator and a 30 ft. boom attached to a half ton pick-up truck. The boom was set with three banks of solid cone (TG-3, Spraying Systems) nozzles that coincided with row spacing. Each group of nozzles had its own line from the main tank; therefore, spray output to specific treatment plots could be easily controlled. Sprays were applied at 40 psi at a rate of 150 gpa on a weekly basis from one week after transplanting to one week before harvest. A pretreatment count was made on 31 Aug and post treatment surveys were conducted on a weekly basis six days after treatment. Ten plants were randomly selected from the two center rows and removed for examination of insects. DBM immatures were counted in separate age groups: early larvae, late larvae, and pupae. Early larvae were those in the first two larval instars. They were identified by their small size and the occurrence of black colored head capsules. Late larvae were those in the last two larval instars. They were identified by their larger size and the occurrence of green or brown head capsules. Pupae were easily identified by their netlike cocoons.

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