DIFFERENTIAL RESPONSE OF MAIZE INBREDS TO BENTAZON AND OTHER HERBICIDES

One field and two greenhouse experiments were conducted to determine the reaction of various maize (Zea mays L.) inbreds and single crosses to four herbicide treatments (atrazine, atrazine plus tridiphane, bentazon, metolachlor) relative to a nontreated control. All herbicides except metolachlor, which was used preemergence, were applied early postemergence with a nonphytotoxic crop oil at 1% carrier volume. Of significant importance is the discovery of maize susceptibility to bentazon and its inheritance. We suggest that the symbol, ben, be assigned to the recessive gene that causes this susceptibility. In the greenhouse, inbreds were more tolerant to atrazine and bentazon than other herbicide treatments. Tridiphane increased atrazine activity and reduced dry plant weight of inbreds on the average by 19%. None of the single crosses was significantly susceptible to atrazine. All inbreds and single crosses were sensitive to metolachlor in the greenhouse, as shown by the 49 and 35% reduction in dry weight, respectively. Information from these experiments can be useful in identifying sources of tolerance and susceptibility to the tested herbicides for programs in conventional maize breeding, weed control, and molecular engineering.Key words: Maize, bentazon, atrazine, tridiphane, metolachlor, inheritance

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Adjuvant comparison for postemergence weed control in corn

Canadian Journal of Plant Science ◽

10.4141/cjps09146 ◽

2010 ◽

Vol 90 (4) ◽

pp. 543-547 ◽

Cited By ~ 2

Author(s):

N. Soltani ◽

C. Shropshire ◽

P H Sikkema

Keyword(s):

Zea Mays ◽

Weed Control ◽

Zea Mays L ◽

Field Trials ◽

Ionic Surfactants ◽

Ionic Surfactant ◽

Corn Yield ◽

Common Lambsquarters ◽

Green Foxtail ◽

Herbicide Treatments

Six field trials were conducted over a 2-yr period (2004 and 2005) at Exeter and Ridgetown, ON, Canada, to evaluate the effect of postemergence application of rimsulfuron plus dicamba plus S-metolachlor/benoxacor, nicosulfuron/rimsulfuron plus dicamba/diflufenzopyr and nicosulfuron plus dicamba/diflufenzopyr with and without Agral 90® or Liberate® non-ionic surfactants on weed control and yield of corn. There was no difference between Agral 90® and Liberate® adjuvant in respect to control of velvetleaf, common ragweed, common lambsquarters and green foxtail. All herbicide treatments provided significantly higher yield than the untreated control. There was also no difference between Agral 90® and Liberate® in respect to corn yield when added to rimsulfuron plus dicamba plus S-metolachlor/benoxacor, nicosulfuron/rimsulfuron plus dicamba/diflufenzopyr and nicosulfuron plus dicamba/diflufenzopyr. Based on these results, Liberate® can be used as an alternative non-ionic surfactant for Agral 90® with the herbicides evaluated.Key words: Agral 90®, benoxacor, dicamba, diflufenzopyr, Liberate®, nicosulfuron, rimsulfuron, S-metolachlor, Zea mays L.

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Application of Bromoxynil+MCPA+Metribuzin at Varied Doses for Broad-Spectrum Weed Control in Forage Maize (Zea mays L.)

Biological Sciences - PJSIR ◽

10.52763/pjsir.biol.sci.62.2.2019.83.87 ◽

2019 ◽

Vol 62 (2) ◽

pp. 83-87

Author(s):

Asif Tanveer ◽

Muhammad Atif Bilal ◽

Muhammad Ather Nadeem ◽

Tasawer Abbas

Keyword(s):

Zea Mays ◽

Weed Control ◽

Zea Mays L ◽

Block Design ◽

Research Area ◽

Forage Yield ◽

Fresh Weight ◽

Forage Maize ◽

Randomized Complete Block Design ◽

Herbicide Treatments

Weed control is one of the crucial factors to achieve higher yield of good quality forage maize. A field trial was conducted during summer 2013 to investigate the effect of bromoxynil+MCPA+metribuzin (Valent 470 EW pre mixed formulation) application at varied doses to control weeds in forage maize (Zea mays L.) at Agronomy Research Area, University of Agriculture, Faisalabad, Pakistan. Application of bromoxynil+MCPA+metribuzin @ 470, 528.75 and 587.50 g a.i/ha was made after emergence of weedsand crop. A check with no application and hand hoeing was included for comparison. The experiment was conducted with four replications under randomized complete block design. The data regarding the weed parameters, yield and yield components of maize were recorded. The results revealed that among the herbicide treatments minimum weed density (three weeks after sowing 35.75 m2 and at harvest 12.25/m2) and dry biomass (20.80 g/m2) was observed with the application of bromoxynil+MCPA+metribuzin @ 587.50 g a.i./ha. Same herbicidal treatment caused significant increase in plant height (248.75 cm), stem diameter (1.45 cm), fresh weight (467.25g) and forage yield (31.47%) of maize. Therefore, use ofbromoxynil+MCPA+metribuzin @ 587.50 g a.i./ha is the best option to manage broad leaved as well as grassy weeds in forage maize to get higher yield of forage .

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EFFECTS OF TEMPERATURE ON RATE AND DURATION OF KERNEL DRY MATTER ACCUMULATION OF MAIZE

Canadian Journal of Plant Science ◽

10.4141/cjps88-113 ◽

1988 ◽

Vol 68 (4) ◽

pp. 935-940 ◽

Cited By ~ 19

Author(s):

M. TOLLENAAR ◽

T. W. BRUULSEMA

Keyword(s):

Growth Rate ◽

Zea Mays ◽

Dry Matter ◽

Zea Mays L ◽

Dry Weight ◽

Controlled Environment ◽

Dry Matter Accumulation ◽

Linear Kernel ◽

Effects Of Temperature ◽

Kernel Growth

The response of rate and duration of kernel dry matter accumulation to temperatures in the range 10–25 °C was studied for two maize (Zea mays L.) hybrids grown under controlled-environment conditions. Kernel growth rates during the period of linear kernel growth increased linearly with temperature (b = 0.3 mg kernel−1 d−1 °C−1). Kernel dry weight at physiological maturity varied little among temperature treatments because the increase in kernel growth rate with increase in temperature was associated with a decline in the duration of kernel growth proportional to the increase in kernel growth rate.Key words: Zea mays L, period of linear kernel dry matter accumulation, controlled-environment conditions, kernel growth rate

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Adaptability of old Italian flint maize (Zea mays L.) varieties to different weed control systems

International Journal of Biodiversity Science Ecosystems Services & Management ◽

10.1080/21513732.2012.655779 ◽

2011 ◽

Vol 7 (4) ◽

pp. 295-300 ◽

Cited By ~ 2

Author(s):

Franco Tesio ◽

Francesca Follis

Keyword(s):

Zea Mays ◽

Control Systems ◽

Weed Control ◽

Zea Mays L

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HERBICIDES FOR FORAGE CORN NO-TILL SEEDED INTO CEREAL STUBBLE

Canadian Journal of Plant Science ◽

10.4141/cjps83-023 ◽

1983 ◽

Vol 63 (1) ◽

pp. 235-241 ◽

Cited By ~ 1

Author(s):

J. A. IVANY ◽

J. R. ENMAN

Keyword(s):

Zea Mays ◽

Weed Control ◽

Prince Edward Island ◽

Zea Mays L ◽

Crop Yields ◽

Taraxacum Officinale ◽

Plant Population ◽

No Till ◽

Herbicide Treatment ◽

Forage Yields

Forage corn (Zea mays L.) was grown successfully in Prince Edward Island by no-till planting the corn into standing cereal stubble 15–20 cm tall using a Buffalo no-till seeder. Planting with the slot-type shoe in a preliminary experiment in 1978 gave better forage yields than planting with a slice-type shoe mainly because of better plant population achieved. Subsequent experiments in 1979–1981 using the slot-type shoe to no-till plant corn in cereal stubble gave good forage yields when adequate weed control was provided with herbicide treatment. Best control of quackgrass (Agropyron repens L. Beauv.) and dandelion (Taraxacum officinale Weber) and crop yields was achieved with glyphosate + atrazine (1.5 + 2.5 kg a.i./ha) or amitrole + atrazine (3.4 + 2.5 kg a.i./ha) applied preemergence after seeding corn and before corn emergence. Control of quack grass and dandelion with glyphosate or amitrole used alone ranged from 71–80%, but paraquat alone did not provide any weed control. Addition of atrazine to paraquat, glyphosate, or amitrole gave improved control of quackgrass and dandelion and higher forage corn yields. Addition of 2.5 kg a.i./ha atrazine gave better results than use of 1.0 kg a.i./ha of atrazine.Key words: Forage corn, no-till seeding, glyphosate, atrazine, aminotriazole, paraquat

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Effect of salt stress on some sweet corn (Zea mays L. var. saccharata) genotypes

Archives of Biological Sciences ◽

10.2298/abs150121062s ◽

2015 ◽

Vol 67 (3) ◽

pp. 993-1000 ◽

Cited By ~ 3

Author(s):

Lydia Shtereva ◽

Roumiana Vassilevska-Ivanova ◽

Tanya Karceva

Keyword(s):

Zea Mays ◽

Salt Stress ◽

Zea Mays L ◽

Sweet Corn ◽

Growth Parameters ◽

Dry Weight ◽

Germination Percentage ◽

F1 Hybrid ◽

Salt Stress Condition ◽

Salinity Levels

An experiment was carried out hydroponically under laboratory conditions to investigate the effect of salt stress on several physiological and biochemical parameters of three sweet corn (Zea mays L. var. saccharata) genotypes: lines 6-13, C-6 (pollen source) and their heterotic F1 hybrid ?Zaharina?. The degree of salinity tolerance among these genotypes was evaluated at three different sodium chloride (NaCl) concentrations: 0 mM, 100 mM, 125 mM and 150 mM. Seed germination, plant growth and biochemical stress determining parameters such as malondialdehyde (MDA), proline content and hydrogen peroxide (H2O2) levels were compared between seedlings of lines and hybrid. The obtained results indicated that both lines and hybrid have similar responses at different salinity levels for all examined traits. All the seedlings? growth parameters, such as germination percentage, root length, shoot length, root and shoot fresh and dry weight, decreased with increasing salinity level. MDA, proline and H2O2 increased at different saline conditions in comparison to the control. Based on the results, of the three genotypes examined, the hybrid Zaharina, followed by line C-6, was more salt-sensitive than line 6-13 in salt stress condition.

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Response of Johnsongrass (Sorghum halepense) and Imidazolinone-Resistant Corn (Zea mays) to AC 263,222

Weed Technology ◽

10.1017/s0890037x00046078 ◽

1999 ◽

Vol 13 (3) ◽

pp. 484-488 ◽

Cited By ~ 11

Author(s):

John W. Wilcut ◽

John S. Richburg ◽

F. Robert Walls

Keyword(s):

Zea Mays ◽

Weed Control ◽

Untreated Control ◽

Field Studies ◽

Sorghum Halepense ◽

Corn Yield ◽

Redroot Pigweed ◽

Herbicide Treatments ◽

Ac 263,222 ◽

Large Crabgrass

Field studies were conducted in 1992 and 1993 to evaluate AC 263,222 applied postemergence (POST) alone and as a mixture with atrazine or bentazon for weed control in imidazolinone-resistant corn. Nicosulfuron alone and nicosulfuron plus atrazine were also evaluated. Herbicide treatments were applied following surface-banded applications of two insecticides, carbofuran or terbufos at planting. Crop sensitivity to POST herbicides, corn yield, and weed control was not affected by insecticide treatments. AC 263,222 at 36 and 72 g ai/ha controlled rhizomatous johnsongrass 88 and 99%, respectively, which was equivalent to nicosulfuron applied alone or with atrazine. AC 263,222 at 72 g/ha controlled large crabgrass 99% and redroot pigweed 100%, and this level of control exceeded that obtained with nicosulfuron alone. AC 263,222 at 72 g/ha controlled sicklepod and morningglory species 99 and 98%, respectively. Nicosulfuron alone or with atrazine controlled these two species less than AC 263,222 at 72 g/ha. Addition of bentazon or atrazine to AC 263,222 did not improve control of any species compared with the higher rate of AC 263,222 at 72 g/ha applied alone. Corn yield increased over the untreated control when POST herbicide(s) were applied, but there were no differences in yield among herbicide treatments.

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