scholarly journals Control of the Silverleaf Whitefly (SW) on Poinsettia Under Greenhouse Conditions, Fall 1993

1994 ◽  
Vol 19 (1) ◽  
pp. 334-334 ◽  
Author(s):  
R. A. Redak ◽  
J. A. Bethke
Keyword(s):  
Block Design ◽  
Post Treatment ◽  
Silverleaf Whitefly ◽  
Rooted Cuttings ◽  
Adaxial Surface ◽  
Randomized Block Design ◽  
Pre Treatment ◽  
Water Treated Control

Abstract Poin settias obtained as rooted cuttings were potted in 15 cm pots. Plants were allowed 4 wk growth (25-30 cm tall) before use in trials. Leaves were counted from the top (leaf of >2 cm2) down. Twenty SW adults were clip-caged (2.5 cm diam) on the adaxial surface of leaf no. 5 for 24 h to obtain a moderate no. of eggs/leaf. Ten days later the no. of nymphs were counted as a pre-treatment count (0 DAT). Plants were assigned to treatments to obtain an equal no. of immatures/treatment. Five plants/treatment were arranged in a randomized block design on a greenhouse bench. Ten treatments and a water treated control were applied by hand sprayer at 45 psi. Post-treatment counts were made at 7 DAT and 14 DAT.

scholarly journals Control of the Silverleaf Whitefly (SW) on Poinsettia Using Soil Treatments, Winter 1992

1994 ◽  
Vol 19 (1) ◽  
pp. 333-333 ◽  
Author(s):  
R. A. Redak ◽  
J. A. Bethke
Keyword(s):  
Post Treatment ◽  
Silverleaf Whitefly ◽  
Sweetpotato Whitefly ◽  
Rooted Cuttings ◽  
Pre Treatment

Abstract Poinsettias obtained as rooted cuttings were potted in 15 cm diam. pots. Plants were allowed 4 wk growth (25-30 cm tall) before use in trials. An arbitrary leaf was selected and a 2.5 cm diam circle drawn on the leaf. On day 0, a pre-treatment count of immature whitefly nymphs within the circle was taken. Plants then were assigned to treatments to approximate an equal no. of immatures/replicate prior to treatments. Three plants/treatment were arranged in a RCB design on a greenhouse bench in constant exposure to sweetpotato whitefly. Four rates of two form, of NTN 33893 (2.5G and 240F) were applied by hand to each pot and drenched with water. Post-treatment counts of eggs, nymphs, redeye pupae, and empty pupal cases were made at 14 DAT, 28 DAT, 49 DAT (7 wk) & 91 DAT (13 wk).

scholarly journals Control of Silverleaf Whitefly on Poinsettia Under Greenhouse Conditions, Summer 1997

1998 ◽  
Vol 23 (1) ◽  
pp. 350-350 ◽  
Author(s):  
R. A. Redak ◽  
J. A. Bethke ◽  
H. S. Costa
Keyword(s):  
Analysis Of Variance ◽  
Post Treatment ◽  
Silverleaf Whitefly ◽  
Rooted Cuttings ◽  
Treatment Data ◽  
Pre Treatment ◽  
Treatment Application

Abstract Poinsettias, ob tained as rooted cuttings, were potted in 15-cm pots and allowed 8-wk growth (15-20 cm tall) before use. The plants were fertilized once with Osmocote (14-14-14) and irrigated every d for three minby overhead misters. On day (0), ten whiteflies were caged on the 5th (counting from top leaf of about 1 cm2 down), and a 2.5-cm-diam circle was drawn on the leaf around the cage perimeter. Twenty-four h later the adult whiteflies were removed. After egg eclosion (10 Jul), a pre-treatment count of the no. of nymphs was taken, and it was followed by treatment application. Post-treatment counts of live nymphs were taken weekly for two wks. Treatments were applied using a backpack sprayer at approximately 25 psi. A RCB design was used with five replicates per treatment. Data were transformed log10 + 1 prior to analysis to satisfy the assumptions of the analysis of variance, and LSD (P = 0.05) was used to separate the means.

scholarly journals Response of growth and yield of two soybean varieties to seed pre-treatment applications

2021 ◽  
Vol 883 (1) ◽  
pp. 012052
Author(s):  
N Herawati ◽  
A R Aisah ◽  
I Mardian ◽  
B N Hidayah ◽  
B T R Erawati
Keyword(s):  
Plant Height ◽  
Seed Treatment ◽  
Seed Quality ◽  
Block Design ◽  
Growth And Yield ◽  
Agronomic Crops ◽  
Randomized Block Design ◽  
Two Factors ◽  
Pre Treatment ◽  
Four Levels

Abstract Plant growth is influenced by seed quality. Seeds need to be treated to prevent pest and disease disorders or to increase seed germination. Soybean planting was carried out in this study by the treatment of varieties and seed pre-treatment application before planting. The study aimed to measure the growth and yield of soybeans by varieties and seed treatment before planting, carried out in the Village of Nggembe, District of Bolo, Bima Regency. The study used factorial randomized block design with two factors. The first factor was soybean varieties consisting of two levels, namely Devon and Dena varieties, and the second factor was the application of pre-planting seed treatments consisting of four levels namely Cruiser, Marshall, Agrisoy, and without seed treatment, each treatment was repeated three times. Observations were made on the performance of agronomic crops and soybean yields. The results showed that the treatment of soybean varieties and the application of seed treatment had a significant influence on plant height and soybean productivity, and both treatments had interactions on parameters of plant height, number of filled pods, weight of 100 seeds, and soybean productivity with the best results successively produced by a combination of Devon-Control, Devon-Marshall, Devon-Agrisoy, and Dena-Cruiser.

scholarly journals ECONOMIC PROFITABILITY OF THE UTILIZATION OF HOMEMADE ORGANIC PESTICIDE FOR SMALL SCALE PRODUCTION OF Brassica Napus L. Varchinensis (PECHAY)

2019 ◽  
Vol 7 (6) ◽  
pp. 56-66
Author(s):  
Steven A. Loneria ◽  
Eunice L. Lluz
Keyword(s):  
Brassica Napus ◽  
Insect Pests ◽  
Block Design ◽  
Post Treatment ◽  
Small Scale ◽  
Hot Pepper ◽  
Scale Production ◽  
Brassica Napus L ◽  
Effective Level ◽  
Pre Treatment

The study focused on the economic profitability of the utilization of homemade organic pesticide for small scale production of Brassica napus L. varchinensis (Pechay). An experiment was undertaken at the Palayamanan Program at the University of Eastern Philippines to determine the effectiveness of homemade organic pesticide in controlling or preventing insect infestation in Pechay, to find out the effective level of this homemade pesticide and to determine the economic profitability of using homemade organic pesticide and insecticide. To explore the use of homemade extract from garlic, Allium sativum L., hot pepper, Capsicum frutescens L., vinegar and mineral oil in the management of insect pests of Pechay. The design used was the randomized complete block design (RCBD) and the data gathered were statistically analyzed using ANOVA and DMRT at 5% level of significant. There were five treatments made up of 50% extracted organic insecticide diluted in 500ml and 1 litter of water  treatment before the insects will attack (pre–treatment) in weekly intervals and separate application of the same formulation of  the treatment after the insect will attack (post-treatment) two days interval and control without any treatment. The result of the study showed that those that gained higher profitable weight in treatment plots were the post – treatment.

scholarly journals Juvenile response to conifer release alternatives on aspen-white spruce boreal mixedwood sites.Part II: Quality of aspen regeneration

2005 ◽  
Vol 81 (4) ◽  
pp. 548-558 ◽  
Author(s):  
Sylvia Greifenhagen ◽  
Douglas G Pitt ◽  
Monique C Wester ◽  
F. Wayne Bell
Keyword(s):  
Populus Tremuloides ◽  
Block Design ◽  
Ground Level ◽  
Fibre Production ◽  
Post Treatment ◽  
Stem Volume ◽  
Randomized Block Design ◽  
Stump Sprouting ◽  
Root Suckering

This study, a component of the Fallingsnow Ecosystem Project, was designed to investigate the effects of conifer release alternatives on the quality of regenerating trembling aspen (Populus tremuloides Michx.). A randomized block design was used to compare untreated aspen with aspen growing in areas treated with two broadcast cutting treatments (brushsaw and Silvana Selective) and two broadcast herbicide treatments (glyphosate and triclopyr). The glyphosate treatment virtually eliminated aspen, whereas triclopyr tended to top-kill aspen, resulting in lateral dominance. Both fall cutting treatments generated prolific aspen root suckering and stump sprouting. Stain was common in aspen across the study site in damaged, untreated, and post-treatment stems, indicating that stain develops rapidly in young aspen suckers. Stems damaged by the treatments had higher incidences of decay (33% of cut stems and 10% of herbicide-damaged stems) than untreated aspen (8% of stems); however, decay volume was low for all treatments (1–4% of total stem volume affected). The location of decay (e.g., near ground level in cut stems) and presence of stem crooks in herbicide-treated aspen are important effects of the treatments on aspen quality. Armillaria root disease, which was found throughout the study site, was more prevalent in roots of treatment-damaged and untreated aspen than in suckers that originated post-treatment. These differences can be attributed to proximity to parent stumps, prevalence of root wounds, and older age of damaged and untreated stems. Key words: aspen quality, decay, conifer release, vegetation management, fibre production

scholarly journals Bio-efficacy of Mineral Oil against Yellow Mite in Dark Jute (Corchorus olitorius L.) under Terai Region of West Bengal

2020 ◽  
pp. 77-82
Author(s):  
Prahlad Sarkar ◽  
Srima Das ◽  
Shyamal Kheroar ◽  
Avijit Kundu ◽  
Swapan Kumar Barman ◽  
...  
Keyword(s):  
Block Design ◽  
Environmental Safety ◽  
Mineral Oil ◽  
Post Treatment ◽  
Neem Oil ◽  
Polyphagotarsonemus Latus ◽  
Randomized Block Design ◽  
Cropping Season ◽  
Effective Combination ◽  
Treatment Observation

An experiment was conducted during pre-kharif season of 2016 and 2017 to determine the efficacy of relatively cheaper, safer horticultural mineral oil on yellow mite (Polyphagotarsonemus latus). The experiment was laid out in randomized block design with seven treatments [T1- mineral oil @ 3 ml/litre at 35 and 50 days after sowing, T2- mineral oil @ 6 ml/litre at 35 and 50 DAS, T3- mineral oil @ 9 ml/litre at 35 and 50 DAS, T4-Neem oil @ 3 ml/litre at 35 and 50 DAS, T5- mineral oil @ 3 ml/litre + neem oil @ 3 ml/litre at 35 and 50 DAS and T6- Control] replicated four times. Two scheduled spraying of each treatment was done on standing jute crop at 15 days interval. The effect of treatments was significant on post treatment mite population recorded after spray for both the cropping season. Among the treatments, T5 was found to be the most effective combination. The post treatment observation during 2016 and 2017 at 7 days after treatment indicated significantly less number of mites i.e. (1.08 and 0.84 mites cm-2) and (0.83 and 0.41 mites cm-2) respectively in the treatment T5. Within the treatments, maximum plant height (216.92 and 206.64 cm) and yield (34.68 and 28.28 q ha-1) were also observed in treatment T5. Considering the effectiveness against mite on jute as well as the environmental safety, mineral oil might be suggested as biorational component of IPM for effective management of yellow mite.

scholarly journals AGRONOMIC PERFORMANCE OF MAIZE UNDER Azospirillum brasilense INOCULATION AND TOP-DRESSING NITROGEN FERTILIZATION

2020 ◽  
Vol 19 ◽  
pp. 15
Author(s):  
VINÍCIUS BALEIRO FERNANDES ◽  
FABIO LUIZ CHECCHIO MINGOTTE ◽  
ORLANDO FERREIRA MORELLO ◽  
ANDERSON PRATES COELHO ◽  
LEANDRO BORGES LEMOS
Keyword(s):  
Grain Yield ◽  
Nitrogen Fertilization ◽  
Azospirillum Brasilense ◽  
Block Design ◽  
Nitrogen Fertilizers ◽  
Agronomic Performance ◽  
Positive Effects ◽  
Viable Cells ◽  
Randomized Block Design ◽  
Pre Treatment

Maize inoculation with bacteria of the genus Azospirillum can reduce the consumption of nitrogen fertilizers to obtain maximum grain yield. In this context, the aim was to evaluate the effect of inoculation with Azospirillum brasilense associated with nitrogen fertilization on the maize agronomic performance. A randomized block design was used in a split-plot scheme with four replicates. Four inoculation managements with Azospirillum brasilense (T0 - control without inoculation; TC2 - seed box inoculation, 200x108 viable cells ha-1; TC3 - seed box inoculation, 400x108 viable cells ha-1; TS1 - previous inoculation of the seeds, 600x108 viable cells ha-1) associated with four top-dressing N doses (0, 60, 120 and 180 kg ha-1), applied at maize stage V6 by urea. Inoculation with Azospirillum brasilense associated with top-dressing nitrogen fertilization increases the number of grain rows per ear, number of grains per row, number of grains per ear and grain yield of maize, mainly due to its positive effects on plant nutrition. Managements with seed box inoculation with 400x108 viable cells per ha (TC3) and inoculation in seed pre-treatment (TS1) are the most recommended for maize.

scholarly journals 584 The Effects of IBA Hormone Concentration, Cutting Type, and Media on Rooting of Local Hazelnut Cuttings

HortScience ◽  
1999 ◽  
Vol 34 (3) ◽  
pp. 547C-547
Author(s):  
A Talaie ◽  
M.R. Nejatie
Keyword(s):  
Block Design ◽  
Favorable Result ◽  
Hormone Concentration ◽  
Significant Relation ◽  
Local Varieties ◽  
Rooted Cuttings ◽  
Total Length ◽  
Effective Factor ◽  
Randomized Block Design ◽  
Rooting Medium

This work was conducted for the purpose of propagation of hazelnut cuttings, using hard-, semi-hard-, and softwood cuttings produced from 1-year-old suckers of local varieties of hazelnuts from the Alamout-Qazvin area of Iran. The research was carried out in a greenhouse with a mist system at the Faculty of Agriculture of Tarbiat Modarres University. This experiment was based on the complete randomized-block design with a factorial framework and resulted in two levels of 5% + 1% according to the Duncan test. The effect of rooting media (sand and pumice), cutting type (hard-, semi-hard-, and softwood), and use of a hormone with five concentrations (control, 1500, 3000, 4500, and 6000 ppm IBA) were investigated. The cuttings, being wounded and treated with hormones on certain beds, were kept in a greenhouse with a mist system. After 4 months, the number of rooted cuttings, mean number of roots per rooted cuttings, total length of roots, mean length of one root, average of dry weights, and average of young shoots were evaluated. The results indicate that the rooting medium and hormone are considerably effective for rooting of the cuttings and is considered as a significant facture. The general conclusion is that the most favorable result is reached with pumice and 4500 ppp IBA. The interaction between rooting medium and hormone on the rooting process was significant, and finally, it was found that there is not a significant relation between callusing and rooting in hazelnut. Also, the wounding is an effective factor for rooting of hazelnut cuttings.

scholarly journals Evaluation of Grape Rootstocks for Resistance to Phymatotrichum omnivorum

HortScience ◽  
1997 ◽  
Vol 32 (6) ◽  
pp. 981a-981
Author(s):  
Michael W. Kilby
Keyword(s):  
New Mexico ◽  
Calcareous Soil ◽  
Block Design ◽  
Economic Loss ◽  
Alkaline Soil ◽  
Relative Resistance ◽  
Rooted Cuttings ◽  
Randomized Block Design ◽  
History Of ◽  
One Year

Phymatotrichum omnivorum (P.O.) is a soil-borne fungus ubiquitous to the alkaline soil of Texas, New Mexico, Arizona, and Mexico. This fungus causes serious economic loss to grapevines in Arizona, ranging from high to low desert environments. In order to determine the relative resistance to P.O., rootstocks of various species combinations were planted in a calcareous soil which had a history of P.O.; the primary Vitis species included in the trial were champini, candican, berlandieri, repestris, and vinifera. One-year-old rooted cuttings were planted in a randomized block design with one plant per plot with six replications. Common names of rootstocks planted included Freedom, Dogridge, Oppenheim 4 (SO4), Harmony, Champanel, and 5BB. The vinifera used as the control was `Sauvignon Blanc'. Vines were allowed to grow and die for two years. All of the rootstocks exhibited greater resistance to P.O. when compared to the vinifera control. The rootstock exhibiting the greatest resistance was Harmony, with a low of 18% mortality. Other rootstocks showed a loss of approximately 33% over the duration of the trial.

scholarly journals Control of a Serpentine Leafminer on Chrysanthemum Under Greenhouse Conditions, Winter, 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 355-355
Author(s):  
R. A. Redak ◽  
J. A. Bethke
Keyword(s):  
Mortality Rate ◽  
Emerging Adults ◽  
High Mortality ◽  
Post Treatment ◽  
Rooted Cuttings ◽  
Environmental Chamber ◽  
Percent Mortality ◽  
Pre Treatment ◽  
Serpentine Leafminer ◽  
Spray Applications

Abstract Chrysanthemums were obtained as rooted cuttings and potted in 15 cm pots in a greenhouse at UCR and allowed 4 wk growth (20-25 cm tall) before use. During week four, Marathon 1G was applied as a soil treatment and drenched into the soil with approximately 250 ml of water. One week later, plants were assigned to treatments prior to leafminer exposure. All plants (six replicates per treatment) were exposed to an existing leafminer colony for 2 h. Pre-treatment counts and remaining spray applications were made four days after leafminer exposure. Spray applications were made using a hand sprayer at 30-40 psi. When the plants were dry, they were tipped over trays filled with sand. Pupae dropped into the trays and the sand was sifted to collect them. Pupae were held in an environmental chamber until all adults had emerged (12 days). Post-treatment counts were then made of the number of pupae and emerging adults. Data were expressed as a mean percent mortality from the pre-treatment count and analyzed using ANOVA. One replicate of the control had an unusually high mortality rate. This replicate was removed as an outlier prior to analysis (Sokal and Rohlf 1981, Dixon 1950).

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