Imidazolinone-Tolerant Rice Response to Imazethapyr Application

2006 ◽  
Vol 20 (2) ◽  
pp. 389-393 ◽  
Author(s):  
Ronald J. Levy ◽  
Jason A. Bond ◽  
Eric P. Webster ◽  
James L. Griffin ◽  
Wei P. Zhang ◽  
...  
Keyword(s):  
Root Growth ◽  
Growth Response ◽  
Leaf Growth ◽  
Rice Cultivar ◽  
Growth Stages ◽  
Fresh Weight ◽  
Application Timing ◽  
Shoot:Root Ratio ◽  
Shoot And Root Growth ◽  
The One

Greenhouse research was conducted to evaluate shoot and root growth response of imidazolinone-tolerant (IT) rice cultivars to imazethapyr applied postemergence at various rates and application timings. Imazethapyr was applied at 70, 140, and 280 g ai/ha to IT cultivars ‘CL 121’ and ‘CL 161’ in the one- to two-leaf and three- to four-leaf growth stages. Imazethapyr applied to one- to two-leaf or three- to four-leaf rice at 70, 140, and 280 g/ha was more injurious to CL 121 than to CL 161. At 3 wk after treatment (WAT), CL 121 was injured 23 to 38% regardless of application timing. In contrast, CL 161 was injured no more than 11% at 3 WAT. Shoot:root ratio for CL 161 was not affected by imazethapyr application. For CL 121, shoot:root ratio was lower following imazethapyr at 280 g/ha than at 70 or 140 g/ha. Based on shoot fresh weight following imazethapyr at 70 g/ha, CL 161 was 1.8 times more tolerant than CL 121 at 2 WAT and 1.3 times more tolerant at 3 WAT. The IT rice cultivar CL 161 is inherently more tolerant to imazethapyr than is CL 121 based on visual injury and shoot and root growth.

Influence of BAS-145138 on the Activity of Sulfonylurea and Imidazolinone Herbicides

1991 ◽  
Vol 46 (11-12) ◽  
pp. 939-944
Author(s):  
Robert M. Devlin ◽  
Irena I. Zbiec
Keyword(s):  
Root Growth ◽  
Dry Weight ◽  
Sulfonylurea Herbicides ◽  
Fresh Weight ◽  
Phytotoxic Activity ◽  
Phytotoxic Effects ◽  
Shoot And Root Growth ◽  
Imidazolinone Herbicides

This study demonstrates that corn can be partially safened by BAS-145138 against sulfonylurea and imidazolinone herbicides. The corn seeds were impregnated with BAS-145138 by soaking the seeds for 6 h in solutions of the safener. BAS-145138 had no effect on corn growth. However, corn shoot and root growth in length, fresh weight, and dry weight was partially protected by BAS-145138 from the phytotoxic effects of the sulfonylurea herbicides thiameturon and CGA -136872. Similar protection was given to corn against the phytotoxic activity of the imidazolinone herbicides imazapyr, imazaquin, and imazethapyr. This study suggests that corn could be safened with BAS-145138 against the phytotoxic effects of residual amounts of sulfonylurea and imidazolinone herbicides found in fields where wheat/corn or soybean/corn rotations take place.

Quizalofop-p-ethyl application in water-seeded coenzyme A carboxylase–inhibiting herbicide-resistant rice with different flood systems

2019 ◽  
Vol 34 (2) ◽  
pp. 188-192
Author(s):  
Eric P. Webster ◽  
Gustavo M. Teló ◽  
Samer Y. Rustom ◽  
Benjamin M. McKnight ◽  
David C. Blouin
Keyword(s):  
Coenzyme A ◽  
Rice Yield ◽  
Growth Stages ◽  
Research Station ◽  
Red Rice ◽  
Application Timing ◽  
Herbicide Resistant ◽  
Initial Application ◽  
Tiller Stage ◽  
The One

AbstractA field study was conducted during the 2016 and 2017 crop seasons at the LSU AgCenter H. Rouse Caffey Rice Research Station to evaluate weed control and rice yield after quizalofop-p-ethyl applications in water-seeded coenzyme A carboxylase (ACCase)–resistant ‘PVLO1’ long-grain rice production utilizing different flood systems, application timings, and quizalofop rates. The initial application of quizalofop was applied at five timings beginning when ‘PVLO1’ rice was at the coleoptile stage (PEG) through the one- to two-tiller stage. A total quizalofop rate of 240 g ai ha–1 was split into two applications: 97 followed by 143 g ha–1 or 120 followed by 120 g ai ha–1 in both pinpoint and delayed flood water-seeded management systems. A second quizalofop application was applied 14 d after initial treatment (DAIT). At 14 DAIT, a reduction in control of barnyardgrass and red rice was observed by delaying the initial quizalofop application to the two- to four-tiller stage compared with rice treated at earlier growth stages. At 42 DAIT, control of barnyardgrass was 94% to 96%, and red rice was 98% following the second application of quizalofop, regardless of initial application timing. Rice treated with quizalofop at the PEG and two- and three-leaf stage resulted in a rice height of 104 cm at harvest compared with 96 to 100 cm when the initial application of quizalofop was delayed to later growth stages. Applying the initial application of quizalofop to rice at the PEG timing in the pinpoint or the delayed flood system resulted in a total gross value per hectare of $450 and $590, respectively. Within each flood system, delaying the initial application of quizalofop to the one- to two-tiller stage resulted in a gross per-hectare value reduction of $100 ha-1 in the pinpoint flood and $110 ha-1 in the delayed flood.

scholarly journals Root and Shoot Growth Response of Three Container-Grown Kalmia latifolia L. Cultivars at Two Locations to Growing Medium and Nitrogen Form

1990 ◽  
Vol 8 (1) ◽  
pp. 10-13
Author(s):  
Rita L. Hummel ◽  
Charles R. Johnson ◽  
Orville M. Lindstrom
Keyword(s):  
Root Growth ◽  
Growth Response ◽  
Shoot Growth ◽  
Nitrogen Form ◽  
Growing Media ◽  
Kalmia Latifolia ◽  
Growing Medium ◽  
Root And Shoot Growth ◽  
Shoot And Root Growth

Abstract Rooted liners of Kalmia latifolia L. ‘Elf’, ‘Freckles’ and ‘Goodrich’ were shipped to Griffin, Georgia, and Puyallup, Washington and were potted into 3.8 liter (# 1) containers. Factorial combinations of growing media (1 bark: 1 peat, 4 bark: 1 peat), NO3/NH4 ratios (100% NO3/0% NH4, 60% NO3/40% NH4, 20% NO3/80% NH4), and rates of N (40, 80, and 120 mg N/pot; 0.0014, 0.0028, and 0.0042 oz N/pot, resp.) were applied at both locations. Results indicated that a combination of the nitrate/ammonium forms of nitrogen (60/40 NO3/NH4) and the 80 mg/pot N rate produced the best overall shoot and root growth on all 3 cultivars at both locations. Root and shoot growth was not affected by growing media at either location. With the exception of lower pH readings for the Georgia media, results for the two locations were remarkably consistent.

Influence of BAS-145138 on the Activity of Sulfonylurea and Imidazolinone Herbicides

1991 ◽  
Vol 46 (9-10) ◽  
pp. 939-944 ◽  
Author(s):  
Robert M. Devlin ◽  
Irena I. Zbiec
Keyword(s):  
Root Growth ◽  
Dry Weight ◽  
Sulfonylurea Herbicides ◽  
Fresh Weight ◽  
Phytotoxic Activity ◽  
Phytotoxic Effects ◽  
Shoot And Root Growth ◽  
Imidazolinone Herbicides

AbstractThis study demonstrates that corn can be partially safened by BAS-145138 against sulfonyl­urea and imidazolinone herbicides. The corn seeds were impregnated with BAS-145138 by soaking the seeds for 6 h in solutions of the safener. BAS-145138 had no effect on corn growth. However, corn shoot and root growth in length, fresh weight, and dry weight was partially protected by BAS-145138 from the phytotoxic effects of the sulfonylurea herbicides thiametu­ron and CGA -136872. Similar protection was given to corn against the phytotoxic activity of the imidazolinone herbicides imazapyr, imazaquin, and imazethapyr. This study suggests that corn could be safened with BAS-145138 against the phytotoxic effects of residual amounts of sulfonylurea and imidazolinone herbicides found in rotations take place.

Glufosinate Antagonizes Clethodim Control of Goosegrass (Eleusine indica)

2005 ◽  
Vol 19 (3) ◽  
pp. 664-668 ◽  
Author(s):  
Ian C. Burke ◽  
Shawn D. Askew ◽  
Jerry L. Corbett ◽  
John W. Wilcut
Keyword(s):  
Growth Stage ◽  
Leaf Growth ◽  
Growth Stages ◽  
Eleusine Indica ◽  
Percentage Points ◽  
Application Rates ◽  
Sequential Treatments ◽  
The One ◽  
And Control ◽  
Respective Rate

Because of a previously reported antagonism of clethodim activity by other herbicides, greenhouse experiments were conducted to determine goosegrass control with clethodim and glufosinate postemergence alone, in tank mixtures, and as sequential treatments. Herbicide treatments consisted of glufosinate at 0, 290, or 410 g ai/ha and clethodim at 0, 105, or 140 g ai/ha, each applied alone, in all possible combinations of the above application rates, or sequentially. Glufosinate at either rate alone controlled goosegrass at the two- to four-leaf growth stage <44%, and control was less for goosegrass at the one- to two- and four- to six-tiller growth stages. Clethodim controlled two- to four-leaf and one- to two-tiller goosegrass 91 and 99% at application rates of 105 and 140 g/ha, respectively, and controlled four- to six-tiller goosegrass 68 and 83% at application rates of 105 and 140 g ai/ha, respectively. All tank mixtures of glufosinate with clethodim reduced goosegrass control at least 52 percentage points when compared to the control with clethodim alone. Glufosinate at 290 or 410 g/ha when applied sequentially 7 or 14 d prior to clethodim reduced goosegrass control at least 50 percentage points compared to the control obtained with clethodim applied alone. Clethodim at rates of 105 or 140 g/ha when applied 7 or 14 d prior to glufosinate controlled goosegrass equivalent to the control obtained with each respective rate of clethodim applied alone at the two- to four-leaf and one- to two-tiller growth stage. Clethodim should be applied to goosegrass no larger than at the one- to two-tiller growth stage at least 7 d prior to glufosinate application or 14 d after a glufosinate application for effective goosegrass control.

scholarly journals Pepper Seedling Growth Response to Drought Stress and Exogenous Abscisic Acid

1992 ◽  
Vol 117 (3) ◽  
pp. 389-393 ◽  
Author(s):  
Daniel I. Leskovar ◽  
Daniel J. Cantliffe
Keyword(s):  
Abscisic Acid ◽  
Drought Stress ◽  
Root Growth ◽  
Capsicum Annuum ◽  
Growth Response ◽  
Leaf Growth ◽  
Dry Weight ◽  
Practical Application ◽  
Growth Morphology ◽  
Exogenous Aba

ABA and drought stress were evaluated on growth morphology and dry weight of pepper (Capsicum annuum L.) seedlings subjected to continuous watering (CV) or alternate watering (AW) subflotation irrigation. When ABA (10-4m) was sprayed on to leaves 28, 32, or 37 days after seeding (DAS), leaf growth was limited relative to the controls. Root dry weight, basal root count, and diameter decreased in AW compared with CW-treated seedlings. ABA did not influence root growth of the transplants or subsequent total fruit yield. When ABA was applied to leaves at 20,23, or 29 DAS, there was a transient inhibition of leaf weight increase, but root growth was unaffected. Exogenous ABA may have a practical application as a substitute for drought stress to control transplant growth in the nursery. Chemical name used: abscisic acid (ABA).

scholarly journals Root Morphology and Interrelationship between Shoot and Root Growth of a Short-root Near Isogenic Line IL-srt1 Derived from Rice Cultivar Oochikara

Root Research ◽  
2005 ◽  
Vol 14 (4) ◽  
pp. 157-164 ◽  
Author(s):  
Rengui ZHAO ◽  
Jian LIU ◽  
Fumitaka SHIOTSU ◽  
Masanori TOYOTA ◽  
Akihito KUSUTANI ◽  
...  
Keyword(s):  
Root Growth ◽  
Root Morphology ◽  
Rice Cultivar ◽  
Isogenic Line ◽  
Near Isogenic Line ◽  
Short Root ◽  
Shoot And Root Growth

scholarly journals Germination and Seedling Growth Response of Sprouts and Leafy Vegetables after Applying Oxygen Nanobubble Water

2021 ◽  
Vol 24 (6) ◽  
pp. 609-617
Author(s):  
Seo Youn Lee ◽  
Seo Hee Jung ◽  
Ah Ram Cho ◽  
Myung Syun Shim ◽  
You Kyung Chung ◽  
...  
Keyword(s):  
Seed Germination ◽  
Root Growth ◽  
Plant Biomass ◽  
Leaf Growth ◽  
Germination Rate ◽  
Dry Weight ◽  
Control Plot ◽  
Leafy Vegetables ◽  
Fresh Weight ◽  
Pak Choi

Background and objective: The nanobubbles remain stable in water, and it increased dissolved oxygen (DO) in the water that promotes the seed germination and the plant growth. We evaluated the seed germination and growth of sprouts (radish, wheat, and barley) and leafy vegetables (red mustard and pak choi) when irrigated with various DO of nanobubble water (NB).Methods: The oxygen NB was generated by surface friction and treated in 4 levels: NB 0% (control, DO 9.21 mg·L-1), NB 20% (DO 15.40 mg·L-1), NB 33% (DO 20.93 mg·L-1), and NB 100% (DO 39.29 mg·L-1).Results: The root length of radish and wheat increased more in NB 33% than the control plot. The fresh weight increased in NB 33% compared to the control plot in radish and wheat, and both fresh and dry weight increased more in NB 20%, NB 33%, and NB 100% than the control plot of barley. The leaf length and width of red mustard decreased more in NB 33% and NB 100% than the control plot and NB 20%, which indicated the leaf compactness. The fresh and dry weight of shoot and root increased more in NB 100% than the control plot in red mustard. In pak choi, the shoot fresh weight increased more in NB 100% than the control plot. In leafy vegetables, the germination rate of red mustard in NB 100% was higher than the control plot, however, it was not significantly different between oxygen NB plots in sprout vegetables.Conclusion: The results showed that the root growth and biomass increased after applying NB 33% in sprout vegetables. The leaf growth properties as the number of leaves and leaf size were not significantly different or decreased in NB treatments compared to control plots, but NB 100% (DO 39.29 mg·L-1) effectively increased the root growth and plant biomass in leafy vegetables.

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