scholarly journals Control of Diamondback Moth and Cross-Striped Cabbageworm on Cabbage with Azadirachtin and Bacillus Thuringienls Aizawai, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 80-80
Author(s):  
P. A. Stansly ◽  
J. M. Conner
Keyword(s):  
Rating Scale ◽  
Gasoline Engine ◽  
Block Design ◽  
Diamondback Moth ◽  
Insect Damage ◽  
Single Row ◽  
Diaphragm Pump ◽  
Wheel Drive ◽  
Randomized Complete Block Design ◽  
Pump Pressure

Abstract Greenhouse-grown seedlings were transplanted in single rows on 30 Mar on 32 inch beds, 240 feet long on 6 foot centers covered whiteface polyethylene film. Six treatments and a control were assigned to 6 plots 19 ft long per bed in a randomized complete block design with 4 replications. Plots were separated by 3 ft of fall-planted collards to provide inocula of target pests. Spray treatments were applied for 8 consecutive weeks starting 13 Apr using a 12 tank sprayer equipped with a diaphragm pump powered by a gasoline engine mounted on a small trailer drawn by a 4-wheel drive Suzuki ATV. A single row boom consisting of 2 side drops with 2 nozzles each plus one nozzle over the row gave a total of 5 nozzles. Yellow Albuz® ceramic tipped nozzles were used at 80 PSI of pump pressure for a delivery rate of 35 gpa. Weekly evaluations were carried out on 8 randomly selected plants per plot by evaluating the inner 5 wrapper leaves and the head of each plant. Number and size of live DBM and CSCW larvae plus pupae were recorded. Damage was assessed using a Horsfall type rating scale from 1 (no apparent damage) to 6 (>30% leaf area eaten, head heavily damaged). At maturity the 8 best heads per plot were selected and graded for marketability based on insect damage to the head and the inner two wrapper leaves. Heads were considered marketable if they had less than 5% damage and the wrapper leaves had less than 10% damage.

scholarly journals Insecticidal Control of Brown Citrus Aphid on Sweet Orange, 1997

1998 ◽  
Vol 23 (1) ◽  
pp. 68-69
Author(s):  
P. A. Stansly ◽  
J. M. Conner ◽  
P. W. Carlin
Keyword(s):  
Stainless Steel ◽  
Colony Size ◽  
Rating Scale ◽  
Sweet Orange ◽  
Block Design ◽  
Single Row ◽  
Diaphragm Pump ◽  
Valencia Orange ◽  
X 24 ◽  
Spray Gun

Abstract The trial was conducted in a commercial block of four-year-old ‘Valencia’ orange rooted to Carrizo citrange planted on a 12 X 24 ft. spacing. A RCB block design was used with 4 replications in separate rows and 5 treatments distributed in single-row plots separated by at least one guard tree. At least 10 new shoots not yet fully expanded and heavily infested with BCA were tagged at the onset of the trial. Foliar treatments were sprayed by hand on 24 Jun using a trailer-mounted sprayer equipped with a 13” brass GunJet Spray Gun fitted with a hardened stainless steel #3 orifice disc-type nozzle. The sprayer was supplied by a gasoline-powered diaphragm pump operating at 200 psi and calibrated to deliver 101 gpa. Tagged colonies were evaluated one day prior to treatment and 2, 7, and 14 DAT using a rating scale of 0 to 6:0 = no aphids, 1 = 1-12 aphids, 2 = 12-50 aphids, 3 = 50-150 aphids, 4 = 150-500 aphids, 5 = 500-1,000 aphids, and 6 = > 1,000 aphids. Average colony size was estimated at 4.6 prior to treatments. In addition, aphids were counted on 5 new pieces of the youngest flush that could be found on each tree on 7, 14, 21 and 28 DAT.

scholarly journals Effect of planting density on the performance of boro rice (BRRI dhan28)

2015 ◽  
Vol 17 (2) ◽  
pp. 67-76
Author(s):  
AM Mahmud ◽  
MY Ali ◽  
KG Quddus ◽  
S Parvin
Keyword(s):  
Grain Yield ◽  
Management Practices ◽  
Block Design ◽  
Rice Variety ◽  
Planting Density ◽  
Single Row ◽  
Standard Management ◽  
Randomized Complete Block Design ◽  
1000 Grain Weight ◽  
Boro Rice

A field experiment was conducted at the Agrotechnology Field Laboratory of Khulna University during the boro season to evaluate the effect of planting density on the performance of rice variety BRRI dhan28. The experiment received twelve treatments, which were divided into two distinct patterns - single row and paired row. The single row had four treatments and paired row had eight treatments. Planting densities were 40, 27, 20 and 16 hills m-2. The experiment was arranged in a randomized complete block design (RCBD) with three replications. Standard management practices were followed in raising crops. Results revealed that closer spacing produced higher yields where 40 hills m-2 produced the most (4.81 t ha-1), which was statistically similar with that of 27 hills   m-2. Paired row planting showed better performance than single row planting. Plant height, grains panicle-1, sterile spikelets panicle-1, 1000-grain weight, grain yield were found better in paired row planting. Paired row planting at a spacing of (35 cm + 15 cm) × 10 cm  i.e row to row distance is 35 cm & 15 cm and hill to hill distance is 10 cm; found the highest grain yield (4.81 t ha-1) and the lowest yield (2.97 t ha-1) was found in single row using a spacing of 25 cm × 25 cm.Bangladesh Agron. J. 2014, 17(2): 67-76

scholarly journals Oriental Herbal as Foliar Nutrients on Lettuce (Lactuca sativa L.) Production

2020 ◽  
Vol 5 (8) ◽  
pp. 1311-1316
Author(s):  
Clint Jay M. Lasco ◽  
Abdani D. Bandera
Keyword(s):  
Block Design ◽  
Black Pepper ◽  
Growth And Yield ◽  
Insect Damage ◽  
College Of Agriculture ◽  
Yield Performance ◽  
Damage Rate ◽  
Randomized Complete Block Design ◽  
Pest Incidence ◽  
Number Of Leaves

The experiment was conducted at the College of Agriculture- Laboratory, Mindanao State UniversityMarawi City. Objective of the study is to determine the effects of Oriental Herbal Nutrients (OHN) on the growth and yield performance of lettuce. Treatments are: T1 (Garlic), T2 (Ginger), T3 (Black Pepper), T4 (Onion), and T5 (Control) with a dilution rate of concoction of 1 tbsp. OHN: 1 liter of water. The experiment was laid out in a Randomized Complete Block Design (RCBD) with three replications. Plant height, number of leaves developed, pest incidence, insect damage rate, weight per plant, and yield per plot were measured. Result showed that the highest treatment mean (6.32 cm.) was recorded in T4 and the lowest (4.03 cm.) was in T5 which revealed a highly significant effect. The highest treatment mean (5.17) for the number of leaves was found in T4 and the lowest (3.89) was observed in T5. In the case of insect damage rate, the highest treatment mean scale of 1.98 was obtained in T5 and the lowest (1.31) was observed in T3. In addition, the highest treatment mean (4.91) for pest incidence was observed in T5 and the lowest (2.08) was found in T1 which showed a highly significant result as well. In addition, the weight per plant revealed the highest treatment mean (49.25) in T4 and the lowest (29.41) was observed in T5. Study revealed that the highest and lowest yield per plot with 4.15 and 2.57 treatment mean were observed in T4 and T5, respectively. In this experiment, the application of OHN significantly influences the growth and yield performance of lettuce.

scholarly journals Colorado Potato Beetle Control on Potatoes with In-Furrow Treatments, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 115-115
Author(s):  
James J. Linduska ◽  
Marylee Ross ◽  
Karen Mulford ◽  
John Nottingham
Keyword(s):  
Colorado Potato Beetle ◽  
Rating Scale ◽  
Block Design ◽  
Compressed Air ◽  
Single Treatment ◽  
Egg Masses ◽  
Row Crop ◽  
Potato Beetle ◽  
Randomized Complete Block Design ◽  
Direct Counts

Abstract ‘Kennebec’ potatoes were planted in 20 foot rows on 25 Apr, ‘94. Plots consisted of a single treatment row. The distance between rows was 64 inches and the distance between plants within the row was 10 inches. Plots were arranged in a randomized complete block design with 4 replications. The soil was a Norfolk "A" loamy sand. Initial furrow treatments were applied to the seed at the rate of 20 gal per acre with a small watering can. Admire foliar treatments were applied at a rate of 50 gal per acre on 8, 23 and 29 Jun with a custom built compressed air row crop sprayer with each row being covered by 6 drop nozzles delivering 50 gal/acre at 30 psi. In evaluating the treatments, direct counts of the number of Colorado potato beetle adults, larvae and egg masses/10 plants and the % defoliation were recorded. Defoliation categories were assigned using a pretransformed defoliation rating scale, based on dividing 90° into 13 steps corresponding to arcsin transformation values (Little & Hills 1978). Yields were taken on 20 Jul from 20-ft of row.

scholarly journals BROCCOLI VARIETAL TOLERANCE TO DOWNY MILDEW

HortScience ◽  
1992 ◽  
Vol 27 (6) ◽  
pp. 629d-629
Author(s):  
Marvin D. Butler ◽  
Jackson A. Davis
Keyword(s):  
Downy Mildew ◽  
Sonoran Desert ◽  
Rating Scale ◽  
Block Design ◽  
Control Measures ◽  
Economic Damage ◽  
Current Interest ◽  
Randomized Complete Block Design ◽  
Varietal Tolerance

Downy mildew is a major concern to broccoli growers in the Sonoran Desert. Control measures include wide use of fungicide applications to prevent economic damage. Recent removal of EBDC type fungicides from the market and restrictions imposed on other registered materials has increased interest by growers and broccoli breeders in developing varieties tolerant to downy mildew. From 1984 to 1989 varieties were evaluated for tolerance to downy mildew in unreplicated trials conducted in commercial fields. In 1990, named varieties of current interest in desert production which showed tolerance to the disease in the previous trials were compared to standard varieties used by the industry. Varieties were replicated four times using a randomized complete block design. A rating scale from 1 to 5 was used to describe the severity of foliar lesions. The varieties Everest, Zeus, Legend, Pirate and Sultan showed significant tolerance when compared to the more susceptible varieties Arcadia, Emerald City, Emperor, Greenbelt, Packman, Commander, and NS 649.

scholarly journals Colorado Potato Beetle Control on Potatoes with Foliar Insecticide Sprays, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 117-117
Author(s):  
James J. Linduska ◽  
Marylee Ross ◽  
Karen Mulford ◽  
John Nottingham
Keyword(s):  
Colorado Potato Beetle ◽  
Rating Scale ◽  
Block Design ◽  
Single Treatment ◽  
Row Crop ◽  
Potato Beetle ◽  
Randomized Complete Block Design ◽  
Control Adult ◽  
Insecticide Sprays ◽  
Direct Counts

Abstract ‘Kennebec’ potatoes were planted in 20 foot rows on 11 Apr, ‘93. Plots consisted of a single treatment row. The distance between rows was 64 inches and the distance between plants within the row was 10 inches. Plots were arranged in a randomized complete block design with 4 replications. The soil was a Norfolk “A” loamy sand. All spray treatments were mixed in 1.5 gallons of water and applied with a custom built compressed air row crop sprayer. Each row was covered by 6 drop nozzles delivering 50 gal/acre at 30 psi. Treatments were applied 1, 9, 21 and 29 Jun. On 21 and 29 Jun, Kryocide and Novodor plots were sprayed with Asana XL 0.05 lb Al/acre and PBO 8EC 0.375 lb Al/acre to control adult Colorado Potato Beetle. Abamectin plots were treated with Asana XL 0.05 lb Al/acre and PBO 8EC 0.375 lb Al/acre on 21 Jun to control adult CPB. In evaluating the treatments, direct counts of the number of Colorado potato beetle adults, larvae, egg masses/10 plants and the % defoliation were recorded. Defoliation categories were assigned using a pretransformed defoliation rating scale, based on dividing 90° into 13 steps corresponding to arcsin transformation values (Little & Hills 1978). Yields were taken on 8 Jul from 20 feet of row.

scholarly journals Control of Lepidopterous Larvae in Sweet Corn, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 85-85
Author(s):  
R. E. Foster ◽  
W. G. Buhler
Keyword(s):  
Sweet Corn ◽  
Block Design ◽  
Insect Damage ◽  
Feeding Damage ◽  
Hollow Cone ◽  
Randomized Complete Block Design ◽  
Over The Top ◽  
High Clearance

Abstract This test was conducted at the O’Neall Memorial Farm, Lafayette, Indiana. The sweet corn variety ‘Bodacious’ was planted 1 Jul in 30 inch rows. Each plot consisted of four rows by 50 feet long, arranged in a randomized complete block design with four replications. Insecticides were applied on 15, 22, 26, and 29 Aug. Treatments on the first two dates coincided with the occurrence of row tassel and the beginning of silk, respectively. Insecticides were applied with a high clearance sprayer operating at 40 psi and delivering 12 gal/acre of finished spray. There were three hollow cone nozzles per row, with one nozzle over the top of the row and one nozzle on each side of the row directed toward the ear zone. Evaluations were made at harvest on 12 Sep by examining twenty-five ears from each plot for the presence of larvae and feeding damage. Each ear was rated as clean (no insect damage), marketable (damage limited to terminal one inch of the ear), or unmarketable (damage extended beyond the terminal inch of the ear).

scholarly journals Control of Lepidopterous Larvae with Insecticides, Pasquotank Co., NC, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 78-78
Author(s):  
K. A. Sorensen ◽  
C. Wade Holloway
Keyword(s):  
Block Design ◽  
Hollow Cone ◽  
Single Row ◽  
Randomized Complete Block Design ◽  
Foliar Damage

Abstract ‘Blue Vantage’ cabbage was transplanted in late Jul near Weeksville, NC. Single row plots, 10 ft long on 42 inch centers were replicated 4 times in a randomized complete block design. Alleys of 5 ft were used between replicates. Treatments were applied with a CO2 pressurized backsprayer using a single hollow cone nozzle (18X) operating at 60 psi to deliver 54.5 gpa. Applications with Trigard AG-98 (spreader) were made with all treatments 22 Aug and 13, 20, and 27 Sep. No applications were applied between 22 Aug and 13 Sep. Counts were extremely low, and we allowed the DBM and CL populations to increase. A slight increase occurred and we applied treatments on 13 Sep. Visual estimates of foliar damage and insect counts were made 20 and 27 Sep and 3 Oct. No insects were present on 3 Oct.

scholarly journals Evaluation of Maize Genotypes against Southern Leaf Blight (Bipolaris Maydis) During Summer Seasons at Rampur, Chitwan

2017 ◽  
Vol 5 (4) ◽  
pp. 532-536
Author(s):  
Tirtha Raj Rijal ◽  
Keshab Babu Koirala ◽  
Mina Karki
Keyword(s):  
Grain Yield ◽  
Rating Scale ◽  
Block Design ◽  
Research Field ◽  
Leaf Blight ◽  
Bipolaris Maydis ◽  
Maize Genotypes ◽  
Randomized Complete Block Design ◽  
Southern Leaf Blight ◽  
Moderately Resistant

Maize genotypes were screened at research field of National Maize Research Program, Rampur, Chitwan on 20 maize genotypes during 2015 and 2016 summer season with the objective of identification of resistant genotypes against southern leaf blight caused by Bipolaris maydis. Field experiment was laid out in randomized complete block design with three replications. Disease scoring was done as percentage of leaf area infected using 1-5 rating scale. In both the years among the tested genotypes, disease severity and grain yield varies significantly. None of the genotypes reacted for resistant whereas four genotypes; 05SADVI, BGBYPOP, RAMS03F08 and RML-32/RML-17 were moderately resistant over the years. For grain yield most of the tested genotypes produced comparatively lower grain yield however RML-32/RML-17 was superior for grain yield (3.1 t/ha) over the years. Int. J. Appl. Sci. Biotechnol. Vol 5(4): 532-536

scholarly journals Effect of Biopesticides and Pheromone Traps on Major Insect-Pests and Their Natural Enemies of Cabbage

2021 ◽  
pp. 64-75
Author(s):  
Aklima Begum ◽  
Md. Abdul Latif ◽  
Mohammed Ali ◽  
Fatima Farhana
Keyword(s):  
Natural Enemies ◽  
Untreated Control ◽  
Insect Pests ◽  
Block Design ◽  
Diamondback Moth ◽  
Flea Beetle ◽  
Marketable Yield ◽  
Tobacco Cutworm ◽  
Randomized Complete Block Design ◽  
Nuclear Polyhedrosis

Aims: This study is aimed to know the effect of biopesticides on insect pests, predators and yield of cabbage. Study Design: The experiment was laid out at a randomized complete block design with four replications. Place and Duration of Study: Central farm of Sher-e-Bangla Agricultural University, Bangladesh during the period from October 2018 to March 2019. Methodology: The experiment was conducted with six treatments viz. T1= Spinosad @25 ml/ha at 7 days interval , T2= SNPV (Spodoptera litura nuclear polyhedrosis virus) @ 2.47/ha at 7days interval, T3= Spodolure trap @ 1/6 plot at 14 days interval, T4= Spodolure trap + Spinosad spray, T5= Spodolure trap + SNPV spray and T6= untreated control. Results: The lowest infested leaves per five plants by flea beetle (0.33), tobacco cutworm (0.33), semi- looper (0.33), diamondback moth (1.33), aphid (7.50), was found in treatment (Spodolure trap + Spinosad).The population of natural enemies per plot was also recorded and highest population of lady bird beetle (8.00) and spider (8.60) was also observed from Spodolure trap + Spinosad treatment as compared to untreated control. The highest percentage of healthy plants (91.67), maximum weight of healthy cabbge head plant-1 (1.20 kg), marketable cabbage head plot-1 (19.48 kg) and marketable yield of healthy cabbage head (45.08 t ha-1) was found with Spodolure trap + Spinosad treatment. Conclusion: It is concluded that Spodolure trap in combination with Spinosad spray may be effective practice for the management of cabbage insect pests.

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