scholarly journals Field Evaluation of Some Selected Chemicals against Bacterial Blight in Cotton

2019 ◽  
pp. 1-10
Author(s):  
Salma Sarker ◽  
N. Sultana ◽  
F. M. Aminuzzaman
Keyword(s):  
Disease Severity ◽  
Bacterial Blight ◽  
Seed Treatment ◽  
Block Design ◽  
Foliar Spray ◽  
Field Evaluation ◽  
Disease Spread ◽  
Streptomycin Sulphate ◽  
Randomized Complete Block Design

The aim of this study is to evaluate the comparative efficacy of some selected chemicals and antibiotic in controlling bacterial blight of cotton variety CB-9 in vivo. A field experiment was carried out at the Department of Plant Pathology, Sher-e-Bangla Agricultural University, Dhaka,  Bangladesh to study efficacy of selected chemicals against bacterial blight of cotton with ten treatments arranged in Randomized Complete Block Design (RCBD).Cotton plant was affected by bacterial blight at all stages of its development. The disease spread from the cotyledons to the leaves followed by the main stems, branches and bolls. Field evaluation of selected chemicals revealed that Streptomycin Sulphate was highly effective against bacterial blight of cotton caused by Xanthomonas axonopodis pv. malvacearum. The highest germination (92%) was found in the treatment where cotton seed was treated with Streptomycin Sulphate at 0.15% which was followed by seed treatment with Streptomycin Sulphate at 0.15% + Foliar spray with Streptomycin Sulphate at 150 ppm. The lowest disease severity in terms of PDI (22.66%) was found in Seed treatment with Streptomycin Sulphate at 0.15% + Foliar spray with Streptomycin Sulphate at 150 ppm subsequently after three foliar sprays at 105 DAS. Seed treatment with Streptomycin Sulphate at 0.15% + Foliar spray with Streptomycin Sulphate at 150 ppm reduced the disease severity by 44.46% over control and increased the yield of seed cotton 34.58% over control. Streptomycin Sulphate showed higher affectivity against bacterial blight of cotton compared with other tested fungicides.

scholarly journals Length of Efficacy for Control of Curly Top in Sugar Beet With Seed and Foliar Insecticides

Plant Disease ◽  
2016 ◽  
Vol 100 (7) ◽  
pp. 1364-1370 ◽  
Author(s):  
Carl A. Strausbaugh ◽  
Erik J. Wenninger ◽  
Imad A. Eujayl
Keyword(s):  
Sugar Beet ◽  
Host Resistance ◽  
Seed Treatment ◽  
Field Experiments ◽  
Block Design ◽  
Root Yield ◽  
Pyrethroid Insecticides ◽  
Beet Curly Top Virus ◽  
Randomized Complete Block Design ◽  
Untreated Check

Curly top in sugar beet caused by Beet curly top virus (BCTV) is an important yield-limiting disease that can be reduced via neonicotinoid and pyrethroid insecticides. The length of efficacy of these insecticides is poorly understood; therefore, field experiments were conducted with the seed treatment Poncho Beta (clothianidin at 60 g a.i. + beta-cyfluthrin at 8 g a.i. per 100,000 seed) and foliar treatment Asana (esfenvalerate at 55.48 g a.i./ha). A series of four experiments at different locations in the same field were conducted in 2014 and repeated in a neighboring field in 2015, with four treatments (untreated check, Poncho Beta, Asana, and Poncho Beta + Asana) which were arranged in a randomized complete block design with eight replications. To evaluate efficacy, viruliferous (contain BCTV strains) beet leafhoppers were released 8, 9, 10, or 11weeks after planting for each experiment, which corresponded to 1, 2, 3, and 4 weeks after Asana application. Over both years, in 30 of 32 observation dates for treatments with Poncho Beta and 14 of 16 observation dates for Asana, visual curly top ratings decreased an average of 41 and 24%, respectively, with insecticide treatments compared with the untreated check. Over both years, in eight of eight experiments for treatments with Poncho Beta and six of eight experiments for Asana, root yields increased an average of 39 and 32%, respectively, with treatment compared with the untreated check. Over both years, the Poncho Beta treatments increased estimated recoverable sucrose (ERS) yield by 75% compared with the untreated check for weeks 8 and 9. By week 10, only the Poncho Beta + Asana treatment led to increases in ERS in both years, while the influence of increasing host resistance may have made other treatments more difficult to separate. When considering curly top symptoms, root yield, and ERS among all weeks and years, there was a tendency for the insecticides in the Poncho Beta + Asana treatment to complement each other to improve efficacy.

scholarly journals Field Evaluation of Azalea Species and Cultivars for Resistance to Azalea Lace Bug and Cranberry Rootworm

HortScience ◽  
1997 ◽  
Vol 32 (3) ◽  
pp. 482B-482 ◽  
Author(s):  
Carol D. Robacker ◽  
S.K. Braman
Keyword(s):  
Block Design ◽  
Field Evaluation ◽  
Deciduous Trees ◽  
Field Plot ◽  
Delaware Valley ◽  
Woody Ornamentals ◽  
Lace Bug ◽  
Randomized Complete Block Design ◽  
Lace Bugs ◽  
Evergreen Azalea

Azalea lace bug (Stephanitis pyrioides) is the most serious pest on azalea. Both evergreen and deciduous azaleas are susceptible, though more resistance has been observed in the deciduous. To identify genes for resistance, fourteen deciduous azalea species, three deciduous azalea cultivars derived from complex hybrids, and one evergreen cultivar were planted in a randomized complete-block design under mixed deciduous trees in the fall of 1994. Each block was replicated 12 times. In the spring and summer of 1995, azalea lace bugs were introduced onto branches of six plants of each of the taxa. One month later, and again in the fall of 1996, the percentage of infected shoots per plant was measured. Very little damage from azalea lace bug was observed on the R. canescens, R. periclymenoides, and R. prunifolium plants, while `Buttercup', `My Mary', R. japonicum, and R. oblongifolium had the greatest damage. The cranberry rootworm, Rhadopterus picipes, damages many woody ornamentals, including some azalea species. The injury appears as elongated cuts on the leaves, and is most severe on plants growing under dense canopies. The cranberry rootworm has been observed in this azalea field plot. Plants were evaluated for damage in June 1995 and 1996. Cranberry rootworm damage was most severe on `Buttercup', R. japonicum, R. prinophyllum, and R. calendulaceum, while the evergreen azalea `Delaware Valley White' was the most resistant.

scholarly journals Effects of Raising Lowbush Blueberry Leaf Cu Concentration on Growth and Yield

HortScience ◽  
2005 ◽  
Vol 40 (4) ◽  
pp. 1107B-1107
Author(s):  
John M. Smagula ◽  
Ilse W. Fastook
Keyword(s):  
Ammonium Sulfate ◽  
Block Design ◽  
Foliar Spray ◽  
Growth And Yield ◽  
P Deficiency ◽  
Lowbush Blueberry ◽  
Randomized Complete Block Design ◽  
Plot Design ◽  
Leaf N ◽  
Effect On Growth

Two experiments evaluated the Trevett (1972) Cu standard of 7 ppm by raising leaf Cu concentrations in a commercial blueberry field having low (∼4 ppm) leaf Cu concentrations. A foliar spray of Cu Keylate (5% Cu) (Stoller Enterprises, Inc.) in a volume of 627 L·ha-1 applied 0, 0.56 1.12, 1.68, or 2.24 kg·ha-1 of Cu. Ammonium sulfate at 3.1 kg·ha-1 was added to the solutions to enhance Cu absorption. A preemergent soil application of Micromate Calcium Fortified Mix (Stoller Enterprises, Inc.), a micronutrient mixture containing Cu (0.3%), was also tested at 14 kg·ha-1. These 6 treatments were replicated 7 times in a randomized complete-block design in 2001. Treatments were reapplied in 2003 in a split-plot design with Cu treatments as the main plots and an application of DAP at 448 kg·ha-1 as the split plots. In 2001, leaf Cu concentrations increased linearly, up to 12 ppm, with increasing rates of Cu, but Micromate had no effect. Leaf N and P concentrations were below the standards of 1.6% and 0.125%, respectively, and could explain why raising leaf Cu concentrations had no effect on growth or yield. In 2003, DAP corrected the N and P deficiency and leaf Cu concentrations were raised to above the 7 ppm standard with 2.24 kg·ha-1 of Cu, but again, no effect on growth or yield was found. The Cu standard appears to be too high.

scholarly journals Effect of foliar spray of GA3 and NAA on sex expression and yield of bitter gourd

2019 ◽  
Vol 44 (2) ◽  
pp. 281-290
Author(s):  
R Khatoon ◽  
M Moniruzzaman ◽  
M Moniruzzaman
Keyword(s):  
Gibberellic Acid ◽  
Block Design ◽  
Foliar Spray ◽  
Sex Expression ◽  
Fruit Weight ◽  
Fruit Yield ◽  
Bitter Gourd ◽  
Yield Attributes ◽  
Randomized Complete Block Design ◽  
Male Flowers

A field experiment was conducted at the Plant Physiology field of Horticulture Research Center, BARI, Gazipur during two consecutive years of kharif 2014 and 2015 to assess the effect of GA3 and NAA on sex expression, yield and yield components of bitter gourd (Momordica charantia L.) var. BARI Karola-1. Eeleven treatments comprising five concentrations each of gibberellic acid (50, 100, 150, 200 and 300 ppm) and naphthalene acidic acid (50, 100, 150, 200 and 300 ppm) along with distilled water considered as control were evaluated in randomized complete block design with three replications. Gibberellic acid (GA3) and Naphthalene acidic acid (NAA) were sprayed at 4 leaf stage; second spray was done at 35-38 DAS and third spray done at flowering stage. All the treatments improved the flowering and yield characters over control. Foliar spray of NAA @ 150 ppm and 200 ppm was found better in terms of sex expression, yield and yield attributes of bitter gourd as compared to control and other treatments. Spray of NAA @ 150 ppm gave the lowest number of male flowers and the highest number of female flowers thereby produced the lowest sex ratio (male:female). Number of fruits/plant, individual fruit weight and fruit yield/plant were also found maximum from NAA 150 ppm. Maximum fruit yield was recorded with the application of NAA @ 150 ppm. Spraying of NAA @ 150 ppm gave the maximum gross return and net return with the highest BCR of 3.17. Bangladesh J. Agril. Res. 44(2): 281-290, June 2019

scholarly journals Effect of Potassium Fertilizer on Development of Bacterial Blight of Rice

1970 ◽  
Vol 46 (1) ◽  
pp. 69-76
Author(s):  
N Begum ◽  
MM Rahman ◽  
MA Bashar ◽  
MA Hossain ◽  
MN Uddin
Keyword(s):  
Disease Severity ◽  
Bacterial Blight ◽  
Oryza Sativa L ◽  
Block Design ◽  
Maximum Yield ◽  
Leaf Blight ◽  
Bacterial Leaf Blight ◽  
Growth Stages ◽  
Potassium Fertilizer ◽  
Bacterial Blight Of Rice

Effect of five potassium doses viz, recommended dose (RD) (40 kg Murate of Potash(MP)/hector), RD + 10 kg MP/ha, RD + 20 kg MP/ha, RD + 30 kg MP/ha, RD + 40 kg MP /ha to manage bacterial blight of rice were studied during Boro season in 2005. The experiment was laid in Randomized Completely Block Design (RCBD) having three replications. Highest disease severity (55.92%) was observed due to bacterial leaf blight at maximum tillering stage when applied 30 kg MP/ha additional potash. Lowest disease severity (0.45%) of bacterial leaf blight were recorded from the plot where no additional MP was applied but highest yield (4.35 tones/ha) was observed in the plot where additional 20 kg MP/ha was applied. The amount of potassium in the leaves did not vary significantly even after additional application of potassium either 30 or 20 kg MP/ha though it was more (1.31%) when applied 40 kg MP/ha. In another experiment in the present study the lowest disease severity 15.22% and 10.53% were recorded when additional 5kg MP /ha was applied seven days before inoculation at active tillering and panicle initiation stages, respectively. Disease severity was lower in single inoculation compare to multiple inoculations except the plot where 5kg/ha additional potash applied three days before bacterial inoculation. Maximum yield (3.86, 4.38, 4.64 t/ha) was recorded when inoculated at active tillering, panicle initiation and flowering stages separately if potassium was applied seven days before inoculation than those of multiple inoculations. The results suggested that potassium top dressing just before disease initiation was good for higher yield and less disease development. However inoculation in all the growth stages of the crop gave lower yields even potassium application was done at seven or three days before or after inoculation. Key words: Bacterial leaf blight; Oryza sativa L.; Potassium fertilizer DOI: http://dx.doi.org/10.3329/bjsir.v46i1.8109 Bangladesh J. Sci. Ind. Res. 46(1), 69-76, 2011

scholarly journals Genetic, Heritability and Genetic Advance of Progenies Derived from Hybridization of Vanda ‘Adrienne’ × Ascocenda ‘Peggy Foo’ with Vanda malinii × Vanda denisoniana Benson & Rchb.f. in vivo

2019 ◽  
Vol 11 (2) ◽  
pp. 233-240
Author(s):  
Minangsari DEWANTI ◽  
Suskandari KARTIKANINGRUM ◽  
Mega WEGADARA ◽  
Budi WINARTO
Keyword(s):  
Genetic Variability ◽  
Phenotypic Variability ◽  
Block Design ◽  
Genetic Advance ◽  
Genetic Heritability ◽  
Randomized Complete Block Design ◽  
Additive Gene ◽  
Number Of Leaves ◽  
Crop Research

Hybridization is the process on interbreeding between individuals of different species or genetically divergent individuals from the same species to produce new progenies with their uniqueness and differences, involving in Vanda. Aim of this research was to explore genotypic and phenotypic variability, heritability and genetic advance of progenies derived from hybridization of Vanda ‘Adrienne’ × Ascocenda ‘Peggy Foo’ with Vanda malinii × Vanda denisoniana Benson & Rchb.f, and to find best characters used for selection. The experiment was conducted at Segunung Experimental Garden of Indonesian Ornamental Crop Research Institute (IOCRI) on altitude of 1100 m above sea level from June 2013 until December 2016. Thirteen genotypes derived from hybridization of V. ‘Adrienne’ × A. ‘Peggy Foo’ with V. malinii × V. denisoniana of 1A, 2A, 21A, 27A, 50A, 52A, 98A, 101A, 102A, 113A, 116A, 120A, and 120B were used in the study. The experiment was arranged in a Randomized Complete Block Design (RCBD) with three replications. Results of the study indicated that range of genetic variability was varied from 1.2-184.7% with wide genetic variability determined on number of leaves per plant (NLP) up to 26.5% with 184.7% for leaf width (LW) and 24.7% for spike length (SL). Moderate heritability of 25.2% for NLP, 21.0% for LW and 25.2% for SL coupled with high genetic advance percent of mean up to 59.7% for NLP, 939.7% for LW and 33% for SL, reflecting the presence and expression of additive gene action of these traits. The results indicated the importance of these three characters best used as selection criteria for Vanda genotypes.

Investigations of the Potential Interactions Between Pre-emergence Residual Herbicides, Variety, and Seed Treatments in Soybean

2018 ◽  
Vol 32 (5) ◽  
pp. 570-578
Author(s):  
Blake R. Barlow ◽  
Lovreet S. Shergill ◽  
Mandy D. Bish ◽  
Kevin W. Bradley
Keyword(s):  
Bacillus Subtilis ◽  
Seed Treatment ◽  
Field Experiments ◽  
Block Design ◽  
Yield Losses ◽  
Treatment Combination ◽  
Seed Treatments ◽  
Randomized Complete Block Design ◽  
Chlorimuron Ethyl ◽  
Potential Interactions

AbstractField experiments were performed in 2016 and 2017 in Missouri to determine whether interactions exist between PRE herbicides and seed treatments in soybean. The experiments consisted of a randomized complete block design with factorial arrangements of varieties, seed treatments, and herbicides. We selected two genetically similar varieties of soybean, one with known tolerance to PPO-inhibiting herbicides and one with known sensitivity. Each variety of seed received three separate seed treatment mixtures (STMs): (1) STM1, imidacloprid plus prothioconazol+penflufen+metalaxyl plus metalaxyl plusBacillus subtilis+B. pumilis, (2) STM2,Pasteuria nishizawaeplus thiamethoxam plus prothioconazol+penflufen+metalaxyl plus metalaxyl plusB. subtilis+B. pumilis, and (3) STM3, fluopyram plus imidacloprid plus prothioconazol+penflufen+metalaxyl plus metalaxyl plusB. subtilis+B. pumilis. Chlorimuron-ethyl+flumioxazin+pyroxasulfone, chlorimuron-ethyl+flumioxazin+metribuzin, and chlorimuron-ethyl+sulfentrazone were applied PRE to each variety and seed treatment combination at 1× and 2× the labeled use rate. Chlorimuron-ethyl+sulfentrazone treatment at the 2× rate resulted in greater injury of 8% and 14% to the sensitive variety than the tolerant in 2016 and 2017, respectively; this was the highest injury observed from any herbicide treatment in either year. In 2017, chlorimuron-ethyl+sulfentrazone resulted in the greatest height reductions in both varieties, but this reduction was more evident in the sensitive (19%) than in the tolerant (6%) variety. Overall, yield differences between the two varieties were not consistent between years, and for both varieties, the sulfentrazone-containing treatments resulted in the highest yield losses. The results of this research indicate that there is a larger interaction between herbicides and varieties than there is between herbicides and seed treatments, or seed treatments and varieties.

scholarly journals Field Efficacy of a Combination of Seed Treatment and Foliar Spray against Pest Complex in Green Gram

2021 ◽  
Author(s):  
V.K. Chaudhari ◽  
V.B. Patel ◽  
M.P. Patel ◽  
A.S. Bhanvadiya
Keyword(s):  
Seed Treatment ◽  
Insect Pests ◽  
Control Measure ◽  
Block Design ◽  
Foliar Spray ◽  
Green Gram ◽  
Effective Control ◽  
Economic Losses ◽  
Growth Stages ◽  
Larval Population

Background: Pulses constitute the major source of dietary protein; therefore, it has ability to fulfil required protein recommended dietary allowance for vegetarian population of India. Pulse crop attack more than 200 insect pests and inflicting heavy damages at different growth stages that lead to significant economic losses to the farmers. The studies were conducted on green gram to find out the effective control measure of different crop stages against insect pests complex in green gram. Methods: The field experiment was laid out in a randomized block design and the consist 12 treatments with seed treatment and foliar sprays of insecticides at 50 per cent flowering stages then these treatments were replicated thrice at both years 2017 and 2018. Result: The experiments concluded that the reduction of sucking pests population like thrips, jassid and whitefly and larval population of Maruca vitrata and Helicoverpa armigera was found in seed treated with imidacloprid 48 FS and spray of flubendiamide at 50 per cent flowering stage in green gram with Rs. 10,678 net profit and 1:1.42 cost-benefit ratio.

scholarly journals Management of purple blotch and Stemphylium blight of onion in Tarai and Bhabar regions of Uttarakhand, India

2016 ◽  
Vol 8 (1) ◽  
pp. 150-153 ◽  
Author(s):  
Deepa Nainwal ◽  
Karuna Vishunavat
Keyword(s):  
Disease Severity ◽  
Trichoderma Harzianum ◽  
Total Yield ◽  
Foliar Spray ◽  
Stemphylium Vesicarium ◽  
Seed Crop ◽  
Alternaria Porri ◽  
Onion Seed ◽  
Stemphylium Blight

Purple blotch [Alternaria porri] (Ellis) Cif.) and Stemphylium blight [Stemphylium vesicarium] (Wallr.) E. Simmons) of onion cause serious problems in onion seed crop in Tarai and Bhabar region of Uttarakhand. In present study different bio agents and fungicides have been evaluated in vivo against both the diseases. The severity of both purple blotch and Stemphylium blight varied in both Tarai and Bhabar region and even more pronounced in Tarai region than in Bhabar region. A correlation was observed in between the severity of both the diseases with the yield in seed crop. The minimum disease severity of purple blotch and stemphylium blight with the foliar spray of mancozeb (@ 0.3%) + monochrotophos (@ 0.05%) were observed 2.67% and 2.57% respectively with the total yield of seed was1844.44 kg/ha over check 893.33 kg/ha in 2011. While with the foliar spray of neembicidine (@ 0.3%) disease severity of both the diseases were 5.57% and 4.78% respectively providing a yield of 1827.78kg/ha in seed crop of onion in 2011. Amongst the applied bio-agents, the foliar spray of Trichoderma harzianum (@ 1%) the disease severity of purple blotch and stemphylium blight were recorded 15.44% and 13.11% respectively which was found to be most effective in delaying the disease appearance and providing a yield of 1134.44kg/ha in 2011. However, all the treatments helped to reduce both the diseases in comparison with check.

scholarly journals Effect of Foliar Application of Banana Pseudostem Sap on Yield of Cowpea (Vigna unguiculata L. Walp.)  

2020 ◽  
Vol 79 ◽  
pp. 9-15
Author(s):  
W.S.L.V. Fernando ◽  
Brintha Karunarathna
Keyword(s):  
Vigna Unguiculata ◽  
Crop Production ◽  
Foliar Application ◽  
Block Design ◽  
Foliar Spray ◽  
Crop Productivity ◽  
Organic Fertilizers ◽  
Significant Difference ◽  
Randomized Complete Block Design ◽  
Pod Length

Improved soil fertility is a requirement for enhanced crop production. Combination of inorganic and organic fertilizers improve crop productivity while reduce environmental degradation. An experiment was carried out at Eastern University, Sri Lanka to study the effect of Foliar Application of Banana Pseudostem Sap on Yield of Cowpea (Vigna unguiculata L. Walp.) in sandy regosol. The experiment was laid out in Randomized Complete Block Design having five treatments viz; recommended inorganic fertilizer N, P, K as basal and N as topdressing (T1), N, P, 1⁄2 K as basal with recommended N as topdressing and foliar spray of 1% , 3%, 5% and 7% banana pseudostem sap solution (T2-T5) at 3rd, 5th, 7th and 9th week after planting. The results revealed that significant difference (P<0.05) were noted on number of pods per plant at 1st and 2nd picking. Higher number of pods per plant, maximum pod length and girth were in T2 while low in T1. Sun dried weights of pods and number of seeds per pod were significantly (P<0.05) varied at each picking. Further, cowpea yield at each picking were higher in T2 compared to tested treatments. The present study suggested that, among the tested treatments N, P, 1⁄2 K as basal with recommended N as topdressing and foliar spray of 1% Pseudostem sap solution at 3rd, 5th, 7th and 9th WAP would be the most suitable for cowpea production in sandy regosol.

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