Effectiveness of paclobutrazol in retarding height growth of Eucalyptusglobulus seedlings

1990 ◽  
Vol 20 (11) ◽  
pp. 1811-1813 ◽  
Author(s):  
S. Hetherington ◽  
K. M. Jones
Keyword(s):  
Plant Height ◽  
Height Growth ◽  
Growth Retardant ◽  
Internode Length ◽  
Pronounced Effect ◽  
Single Application ◽  
Reduced Height

Foliar applications of paclobutrazol significantly reduced height growth and internode length in Eucalyptusglobulus Labill. seedlings. Monthly applications of 125 or 500 mg/L had a more pronounced effect than one single application of 125, 500, or 2000 mg/L. The greatest reduction in plant height was achieved by applying 500 mg/L at monthly intervals over 5 months. Two months after this treatment was ceased the growth retardant effects persisted.

scholarly journals Pampas Grass Responses to Ancymidol, Paclobutrazol, and Uniconazole Substrate Drenches

2001 ◽  
Vol 11 (2) ◽  
pp. 216-219 ◽  
Author(s):  
James C. Sellmer ◽  
Craig R. Adkins ◽  
Ingram McCall ◽  
Brian E. Whipker
Keyword(s):  
Plant Growth ◽  
Plant Height ◽  
Growth Regulators ◽  
Dose Response ◽  
Linear Response ◽  
Height Growth ◽  
Growth Retardant ◽  
Residual Effects ◽  
Greenhouse Production ◽  
Cortaderia Selloana

Plant growth retardant (PGR) substrate drenches (in mg a.i per pot.) of ancymidol at 0.25, 0.5, 1, 2, or 4; paclobutrazol at 1, 2, 4, 8, or 16; and uniconazole at 0.25, 0.5, 1, 2, or 4 (28,350 mg = 1.0 oz) were applied to pampas grass (Cortaderia selloana). Control of height growth during greenhouse forcing and the residual effects on plant growth in the landscape were evaluated. During greenhouse forcing, plant height exhibited a quadratic dose response to paclobutrazol and uniconazole, while ancymidol treated plants exhibited a linear response to increasing dose. All rates of uniconazole resulted in plant heights which were 56% to 75% shorter than the nontreated control, whereas paclobutrazol and ancymidol treatments resulted in 6% to 64% and 5% to 29% shorter plants, respectively. Severe height retardation was evident with {XgtequalX}2 mg uniconazole. When the plants were transplanted and grown in the landscape (24 weeks after the PGR application), all plants treated with ancymidol, paclobutrazol, and {XltequalX}0.5 mg uniconazole exhibited heights similar to the nontreated control, suggesting no residual effects of the PGR for these treatments. Only plants treated with uniconazole at {XgtequalX}1 mg remained shorter than the nontreated control in the landscape. These results demonstrate that plant growth regulators can be effectively and economically applied in the greenhouse production of pampas grass.

Density Effects on Plant Height Growth and Inequality in Sunflower Populations

2006 ◽  
Vol 48 (5) ◽  
pp. 513-519 ◽  
Author(s):  
Sa Xiao ◽  
Shu-Yan Chen ◽  
Lu-Qiang Zhao ◽  
Gang Wang
Keyword(s):  
Plant Height ◽  
Height Growth ◽  
Density Effects

Functional relationships of leafing intensity to plant height, growth form and leaf habit

2012 ◽  
Vol 41 ◽  
pp. 20-29 ◽  
Author(s):  
En-Rong Yan ◽  
Rubén Milla ◽  
Lonnie W. Aarssen ◽  
Xi-Hua Wang
Keyword(s):  
Plant Height ◽  
Growth Form ◽  
Height Growth ◽  
Functional Relationships ◽  
Leaf Habit

scholarly journals Controlling Poinsettia (Euphorbia pulcherrima Will.) Height with Growth Retardant Application in West Java, Indonesia

2016 ◽  
Vol 3 (3) ◽  
pp. 89-92
Author(s):  
Dewi Sukma ◽  
Gina Megawati
Keyword(s):  
Plant Height ◽  
Growth And Development ◽  
Leaf Size ◽  
Flowering Plants ◽  
Growth Retardant ◽  
Euphorbia Pulcherrima ◽  
West Java ◽  
Internodal Length ◽  
Potted Plant ◽  
Plant Shoots

A study was conducted to evaluate the effects of the growth retardant Cycocel application in the growth and development of poinsettia (Euphorbia pulcherrima) ‘Freedom Red’.  Cycocel was applied by spraying plant shoots at the concentrations of 1000, 1500, 2000, 2500 ppm. The increase in cycocel concentrations reduced plant height, leaf size, internodal length, plant spread and the number of flowering plants. All cycocel concentrations resulted in an ideal potted plant height. The optimum spray concentration of Cycocel used to obtain compact and uniformly flowering plants under tropical West Java environment was 1000 ppm.

scholarly journals Aplikasi Pestisida Nabati Maja - Gadung dan Metabolit Sekunder Beauveria Bassiana Bals. Untuk Mengendalikan Hama Thrips Sp. Pada Tanaman Cabai Rawit

2021 ◽  
Vol 2 ◽  
pp. 187-193
Author(s):  
Tarjoko Tarjoko ◽  
Mujiono Mujiono
Keyword(s):  
Plant Height ◽  
Beauveria Bassiana ◽  
Block Design ◽  
Fruit Weight ◽  
Limiting Factor ◽  
Predator Population ◽  
Single Application ◽  
Combined Application ◽  
Botanical Pesticide ◽  
Number Of Leaves

Pest attacks on chili plants are the main limiting factor in cultivation activities. The research  aims to determine the effect of single application of botanical pesticide maja-gadung (PMG), single application of secondary metabolite Beauveria bassiana BIO (BIO B10), combined application of PMG and BIO B10  on pest populations, predator populations and plant growth and production of  chili. The  reesearh used a factorial Completely Randomized Block Design (RAKL) with 3 replications, so there were 9 treatment combinations (0 ml/l PMG, 4 ml/l PMG, 8 ml/l BIO B10, 0 ml/l PMG, 2  ml/l BIO B10,  4 ml/l BIO B10, 4 ml PMG+2 ml/l BIO B10,  4 ml/ml PMG+4 ml BIO B10, 8 ml/l  PMG+2ml/l BIO B10, 8 ml/l PMG+4 ml/l BIO B10). The variables observed were Thrips sp population, predator population, plant height, number of leaves, and fruit weight per plant. The results showed that the single application treatment of PMG  with a concentration of 4 ml/l and 8 ml/l was able to suppress the population of Thrips sp. by 21.6% and 41.4% compared to the control. The single application treatment of BIO B10  with concentrations of 2 ml/l and 4 ml/l was able to suppress the population of Thrips sp. by 66.5% and 65.5% compared to the control. The best combination application is PMG  and BIO B10with a concentration of 8 ml/l + 4 ml/l which is able to suppress the population of Thrips sp. by 76.9% compared to the control. The application treatment of PMG andBIO B10 did not affect plant height, number of leaves, and fruit weight per plant.

scholarly journals Soil disturbance and 10-year growth response of coast Douglas-fir on nontilled and tilled skid trails in the Oregon Cascades

2002 ◽  
Vol 32 (2) ◽  
pp. 233-246 ◽  
Author(s):  
Ronald Heninger ◽  
William Scott ◽  
Alex Dobkowski ◽  
Richard Miller ◽  
Harry Anderson ◽  
...  
Keyword(s):  
Tree Growth ◽  
Volume Growth ◽  
Soil Surface ◽  
Soil Bulk Density ◽  
Soil Disturbance ◽  
Height Growth ◽  
Douglas Fir ◽  
Negative Effects ◽  
Fine Soil ◽  
Reduced Height

We (i) quantified effects of skidder yarding on soil properties and seedling growth in a portion of western Oregon, (ii) determined if tilling skid trails improved tree growth, and (iii) compared results with those from an earlier investigation in coastal Washington. Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) seedlings were hand planted at eight recent clearcuts in skid ruts in either nontilled or tilled trails, in adjacent soil berms, and in adjacent logged-only portions. Four and 5 years after skidding, rut depths averaged 15 cm below the original soil surface; mean fine-soil bulk density (0–30 cm depth) below ruts of nontilled trails exceeded that on logged-only portions by 14%. Height growth on nontilled trails averaged 24% less than on logged-only portions in year 4 after planting and decreased to 6% less in year 7. For years 8–10, mean height growth was similar for all treatments. Reduced height growth lasted for about 7 years compared with 2 years for coastal Washington. Ten years after planting, trees in skid-trail ruts averaged 10% shorter with 29% less volume than those on logged-only portions. Tillage improved height and volume growth to equal that on logged-only portions. Generalizations about negative effects of skid trails on tree growth have limited geographic scope.

Soybean (Glycine Max) Cultivar Tolerance to San 582H and Metolachlor As Influenced by Soil Moisture

Weed Science ◽  
1995 ◽  
Vol 43 (2) ◽  
pp. 288-292 ◽  
Author(s):  
Bradley T. Osborne ◽  
David R. Shaw ◽  
Randall L. Ratliff
Keyword(s):  
Soil Moisture ◽  
Glycine Max ◽  
Plant Height ◽  
Field Experiments ◽  
Soybean Cultivar ◽  
Plant Populations ◽  
Crop Height ◽  
Reduced Height ◽  
Leaf Drop

Field experiments were conducted in 1991 and 1992 to evaluate differential soybean cultivar tolerance to SAN 582H and metolachlor applied PRE, as influenced by soil moisture. Eighteen d after planting, a 3× rate of SAN 582H (3.0 kg ai ha−1) reduced plant populations of ‘Wright,’ ‘Bedford,’ and ‘Stonewall’ and metolachlor did not. At leaf drop, neither herbicide reduced crop height with optimum moisture. With excessive moisture, 3× rates of SAN 582H reduced plant height of Wright, Bedford, ‘Walters,’ ‘Young,’ ‘Brim,’ and ‘Bryan,’ and metolachlor reduced height of ‘Sharkey.’ The greatest yield reductions were due to excessive moisture, regardless of herbicide. Neither herbicide reduced yields with optimum moisture nor did a 1× rate with excessive moisture. However, with excessive moisture, a 3× rate of metolachlor (5.0 kg ai ha−1) reduced yield of Bedford by 470 kg ha−1, and the 3× rate of SAN 582H reduced yield of ‘Rhodes,’ Walters, and ‘Centennial’ more than 500 kg ha−1. Overall, soybean tolerance to both herbicides was good, but if used above recommended rates and with excessive moisture, injury can occur.

Appropriate Nitrogen and Phosphorus Fertilizer Regime for Sunflower (Helianthus Annuus L.) In the Humid Tropics

Helia ◽  
2019 ◽  
Vol 42 (70) ◽  
pp. 111-125
Author(s):  
E. Akpojotor ◽  
V.I.O. Olowe ◽  
C. Adejuyigbe ◽  
S.O. Adigbo
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Agricultural Research ◽  
Block Design ◽  
Field Trials ◽  
Humid Tropics ◽  
Single Application ◽  
Nitrogen And Phosphorus ◽  
Yield Attributes ◽  
P Fertilizer

AbstractTwo field trials were conducted on the Research Farm of the Institute of Food Security, Environmental Resources and Agricultural Research, Nigeria during the late cropping seasons (Jun.–Nov.) of 2014 and 2015 to evaluate the agronomic performance of four recently released sunflower varieties (SAMSUN-1, SMASUN-2, SAMSUN-3 and SAMSUN-4) to three fertilizer regimes: Control, Split application of 30 kg N + 28 kg P2O5 at 21 days after sowing (DAS) and at anthesis and Single application of 60 kg N and 56 kg P2O5 at 21DAS. The experiment was laid out in a randomized complete block design using a 3 × 4 factorial arrangement and replicated three times. Data were collected on phenology, plant height, seed yield and yield attributes, and quality. The varietal effect was only significant in 2015 for head weight, a number of achene per head and 100 achene weight. Application of N and P fertilizer either as split or single significantly (P ≤ 0.05; F-test) enhanced plant height at R5 and R9, 100 achene weight, achene weight per head and grain yield in both years. Single application resulted in significantly (P ≤ 0.05) higher grain yield in 2014 than the split and control and was on par with a split. Significant variety × fertilizer regime was recorded for protein content in 2014 and 2015, and oil content in 2015. Therefore, a single application of N and P fertilizers at 21 WAS is recommended for adoption in the humid tropics to enhance seed and oil production of SAMSUN-3 and SAMSUN-4.

Soybean (Glycine max) Response to Chlorimuron and Imazaquin as Influenced by Soil Moisture

1992 ◽  
Vol 6 (2) ◽  
pp. 389-395 ◽  
Author(s):  
Larry J. Newsom ◽  
David R. Shaw
Keyword(s):  
Soil Moisture ◽  
Glycine Max ◽  
Plant Height ◽  
Field Experiments ◽  
Soybean Cultivar ◽  
Moisture Regime ◽  
Natural Rainfall ◽  
Herbicide Treatment ◽  
Reduced Height ◽  
Moisture Regimes

Field experiments were conducted in 1989 and 1990 to evaluate differential soybean cultivar tolerance to chlorimuron and imazaquin applied PPI, as influenced by soil moisture. Natural rainfall was supplemented with irrigation to achieve three moisture regimes: low (nonirrigated), optimum (5 cm wk–1), and excessive (15 cm wk–1). Imazaquin at 140 g ai ha–1did not adversely affect height or yield of cultivars under any of the moisture regimes. Excessive moisture, regardless of herbicide treatment, reduced height and yield with many of the cultivars. Chlorimuron at 80 g ai ha–1caused additional plant height reductions of 8 cm or more with ‘Asgrow 5403% ‘Asgrow 5979’, ‘Coker 686’, ‘Asgrow 6785’, ‘Hartz 6686’, and 'Sharkey’ in the excessive moisture regime, and yield was reduced 450 kg ha–1or more with ‘Hutcheson’, ‘Terra-Vig 515’, Coker 686, Asgrow 6785, and Hartz 6686. Chlorimuron in the optimum moisture regime reduced the height of Coker 686 and ‘Deltapine 566’ 10 and 11 cm, respectively; however, no yield reductions were noted.

scholarly journals The Effect of Pythium ultimum and Soil Flooding on Two Soybean Cultivars

Plant Disease ◽  
2006 ◽  
Vol 90 (5) ◽  
pp. 597-602 ◽  
Author(s):  
M. T. Kirkpatrick ◽  
C. S. Rothrock ◽  
J. C. Rupe ◽  
E. E. Gbur
Keyword(s):  
Plant Height ◽  
Growth Stage ◽  
Soil Layer ◽  
Dry Weight ◽  
Pythium Ultimum ◽  
Height Growth ◽  
Root Weight ◽  
Infested Soil ◽  
Soil Flooding ◽  
Top Dry Weight

The effect of flooding and Pythium ultimum on soybean, Glycine max, was determined in a series of greenhouse experiments using the cultivars Hutcheson and Archer. Seeds were planted into pasteurized soil either not infested or infested with sand-cornmeal inoculum of P. ultimum and either flooded at emergence for 2 days or at the four leaf node stage (V4) for 5 days. A nonflooded control was included in each experiment. Seeds placed directly into infested soil resulted in little or no stand for Hutcheson regardless of flood treatment, whereas stand was reduced for Archer only in the flooded infested soil treatment. Additional experiments were conducted by placing seed onto a 2- to 5-mm layer of pathogen-free soil on top of the infested soil. Flooding at emergence reduced plant height, growth stage, and top dry weight for Hutcheson and root fresh weight for both cultivars. Greater reductions for Hutcheson in root weight, and top dry weight in P. ultimum-infested soil in the soil layer experiments, also indicated that Hutcheson was more susceptible than Archer. Flooding alone decreased root weights, and infestation with P. ultimum reduced weights further resulting in an additive effect. This also was the case for plant height, growth stage, and top dry weight for Hutcheson for flooding at emergence. Root discoloration was greatly increased for both cultivars in infested soil flooded at emergence. Similar results were found when plants were flooded at V4; however, the effect was not as great as with flooding at emergence. These studies indicate that Pythium damping-off and root rot may account for a portion of the negative response of soybean to flooding. The results also indicate that Archer has some resistance to P. ultimum.

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