Barnyardgrass (Echinochloa crus-galli) Control as Affected by Application Timing of Glufosinate Applied Alone or Mixed with Graminicides

2019 ◽  
Vol 33 (2) ◽  
pp. 272-279
Author(s):  
Amber N. Eytcheson ◽  
Daniel B. Reynolds
Keyword(s):  
Growing Season ◽  
The Other ◽  
Growth Stages ◽  
Control Applications ◽  
Application Timing ◽  
Time Of Application ◽  
Greenhouse Experiments ◽  
Variable Control ◽  
Timing Data ◽  
Control Response

AbstractField and greenhouse studies were conducted to evaluate the antagonism potential of glufosinate applied sequentially or mixed with graminicides on barnyardgrass control. Applications of glufosinate alone provided variable control throughout the growing season in both field and greenhouse experiments. In the field, barnyardgrass control was not adversely affected by glufosinate- and clethodim-mix applications or sequential applications of glufosinate before or after clethodim. Soybean yield was not affected by application timing or clethodim rate, with yield ranging from 1,748 to 2,733 kg ha−1. In the greenhouse, glufosinate applied 1 and 3 d before graminicides generally reduced barnyardgrass control compared with the graminicides applied alone. The response with quizalofop-P was not as dramatic as with the other graminicides. Although significant visual barnyardgrass control differences were detected due to application timing of glufosinate, barnyardgrass biomass with fluazifop-P and quizalofop-P did not differ between the application timings of glufosinate. However, glufosinate applied 1 and 3 d before clethodim had significantly greater biomass compared with glufosinate applied 1 and 3 d after clethodim. The differences in environmental conditions and growth stages at the time of application may have contributed to barnyardgrass control response differences between the field and greenhouse experiments. Although barnyardgrass control in the field was not affected by glufosinate application timing, data from the greenhouse indicate potential exists for reduced control if glufosinate is applied 1 or 3 d before graminicides.

Multiple herbicide–resistant canola can be controlled by alternative herbicides

Weed Science ◽  
2004 ◽  
Vol 52 (1) ◽  
pp. 152-157 ◽  
Author(s):  
Hugh J. Beckie ◽  
Ginette Séguin-Swartz ◽  
Harikumar Nair ◽  
Suzanne I. Warwick ◽  
Eric Johnson
Keyword(s):  
Gene Flow ◽  
Resistance Gene ◽  
Herbicide Resistance ◽  
The Other ◽  
Growth Stages ◽  
Gene Stacking ◽  
Herbicide Resistant ◽  
Leaf Stage ◽  
Greenhouse Experiments ◽  
Herbicide Resistance Gene

Unintentional herbicide resistance gene stacking in canola may alter the sensitivity of volunteers to herbicides of alternative modes of action commonly used for their control. Greenhouse experiments were conducted to investigate the response of three single-herbicide–resistant (HR) cultivars (glyphosate, glufosinate, imidazolinone), one non-HR cultivar, and seven multiple (double or triple)–HR experimental lines to 2,4-D (amine and ester), MCPA ester, and metribuzin applied at the two- to three-leaf stage and of one non-HR and four HR cultivars (glyphosate, glufosinate, imidazolinone, bromoxynil) to 2,4-D amine applied at two growth stages (two- to three-leaf stage and five- to six-leaf stage). All canola cultivars or lines treated at the two- to three-leaf stage responded similarly to increasing doses of each of the three herbicides. At the five- to six-leaf stage, however, the bromoxynil HR cultivar was less sensitive to 2,4-D than the other cultivars. The results of this study suggest that canola with multiple-herbicide–resistance traits does not differ from cultivars that are non-HR or single HR in its sensitivity to herbicides commonly used to control volunteers. All volunteers, whether non-HR, single HR, or multiple HR, should be treated when plants are most sensitive to herbicides (two- to four-leaf stage) to reduce their interference against crops and their perpetuation of gene flow.

scholarly journals Effects of Gallery Applied at Different Growth Stages to Dwarf Burning Bush (Euonymus alatus ‘Compacts’)

1998 ◽  
Vol 16 (3) ◽  
pp. 155-158 ◽  
Author(s):  
Sydha Salihu ◽  
Jeffrey F. Derr ◽  
Kriton K. Hatzios
Keyword(s):  
Leaf Size ◽  
Field Trials ◽  
The Other ◽  
Growth Stages ◽  
Bud Break ◽  
Herbicide Application ◽  
Application Timing ◽  
Euonymus Alatus ◽  
Dormant Stage ◽  
Different Growth Stages

Abstract The effect of Gallery application timing on dwarf burning bush tolerance was determined in field trials. Gallery was applied foliarly at 0.84, 1.69 and 3.39 kg ai/ha (0.75, 1.5 and 3 lb ai/A) to dwarf burning bush at different growth stages. Gallery applied at the dormant stage and two months after bud-break did not injure dwarf burning bush. Plants treated one month after bud-break with all three rates were injured approximately 30 to 45% at one and three months after herbicide application. Injury symptoms were manifested as decreased leaf size and leaf distortions. Gallery applied at 0.84 and 1.69 kg/ha (0.75 and 1.5 lb/A) one month after bud-break decreased plant width. Shoot-dieback was also observed in plants treated with Gallery at all rates one month after bud-break. Gallery at all three rates applied one month after bud-break caused 60 to 75% of the leaves to defoliate six weeks earlier in the fall compared to the other application timings.

Effect of Adjuvants on Weed Control and Soybean (Glycine max) Tolerance with AC 263,222

1991 ◽  
Vol 5 (4) ◽  
pp. 817-822 ◽  
Author(s):  
Marshall B. Wixson ◽  
David R. Shaw
Keyword(s):  
Glycine Max ◽  
Nonionic Surfactant ◽  
Weed Control ◽  
Field Experiments ◽  
Growth Stages ◽  
Application Timing ◽  
Time Of Application ◽  
Pitted Morningglory ◽  
Herbicide Treatments ◽  
Ac 263,222

Field experiments were established to observe the effects of adjuvants and time of application on weed control and ‘Terra-Vig 515’ soybean tolerance with POST applications of AC 263,222. A nonionic surfactant or a crop oil concentrate increased sicklepod control with AC 263,222 applied at either V2 or V6 soybean growth stages. Sicklepod control increased as AC 263,222 was increased from 35 to 70 g ai ha–1only when applied without an adjuvant. Late in the season, there was no difference in sicklepod control between V2 and V6 applications. Adjuvants and application timing within herbicide treatments had no effect on pitted morningglory control, and, though adjuvants increased common cocklebur control, all treatments controlled more than 85% of both species. AC 263,222 with adjuvants at all rates and timings injured and stunted soybean more 2 wk after treatment compared to AC 263,222 alone. AC 263,222 at 35 or 70 g ha–1with crop oil concentrate reduced yields more than AC 263,222, with either a surfactant or no adjuvant when applied to V2 soybeans.

Late Glyphosate Applications Alter Yield and Yield Components in Glyphosate-Resistant Canola (Brassica napus)

2015 ◽  
Vol 29 (4) ◽  
pp. 675-683 ◽  
Author(s):  
Eric Tozzi ◽  
K. Neil Harker ◽  
Robert E. Blackshaw ◽  
John T. O'Donovan ◽  
Stephen E. Strelkov ◽  
...  
Keyword(s):  
Weed Management ◽  
Yield Components ◽  
Growth Stages ◽  
Management Options ◽  
Seed Formation ◽  
Application Timing ◽  
Off Label ◽  
Leaf Stage ◽  
Time Of Application ◽  
Yield And Yield Components

The development of glyphosate-resistant canola has provided improved weed-management options for growers, but crop tolerance to glyphosate may be inadequate at later growth stages. In this study, glyphosate-resistant canola 45H28 (RR) was used to determine the effects of glyphosate application timing on yield and yield components at several sites in western Canada. Canola received a single glyphosate applications at the two-leaf, six-leaf, bolting, and early bloom stages and sequential applications at the two-leaf + six-leaf, two-leaf + bolting, and two-leaf + early bloom stages. Contrasts were made between early vs. late, single vs. sequential, and on-label (two to six-leaf stage) vs. off-label (above six-leaf stage). In general, differences between application timings were observed for yield and yield components in 3 of 8 site-yr. Off-label applications of glyphosate (later than six-leaf) significantly decreased yield, seeds per pod, and increased thousand-seed weight and aborted pods in canola at the Lethbridge and St. Albert locations. Increased glyphosate translocation because of adequate, but not excessive, moisture to new growth may have suppressed new seed formation and encouraged pod abortion at the time of application in the 2010 and 2011 seasons. Results from this experiment demonstrate the importance of proper application timing of glyphosate on canola and can help better predict the effects of late applications.

scholarly journals Fungi associated with pods and seeds during the R6 and R8 stages of four soybean cultivars in southwestern Indiana

2005 ◽  
Vol 82 (1) ◽  
pp. 1-11 ◽  
Author(s):  
R.E. Baird ◽  
T.S. Abney ◽  
B.G.. Mullinix
Keyword(s):  
Pathogenic Fungi ◽  
Growing Season ◽  
The Other ◽  
Growth Stages ◽  
Phomopsis Longicolla ◽  
Isolation Frequency ◽  
Stage Of Development ◽  
Almost All ◽  
Harvest Maturity ◽  
Major Pathogens

A total of 6,403 isolates of fungi were identified from soybean pods and seeds collected late in the 1992 and 1993 growing season (R6 and R8 soybean growth stages). The majority of fungi consisted of Deuteromycetes (95.5%) followed by Ascomycetes (0.9%). Common fungal genera isolated during the study included Phomopsis, Alternaria, Cercospora, and Colletotrichum (= Glomerella) . Cercospora and Phomopsis were identified more commonly from pods and seeds at harvest maturity (R8) than at the greenbean stage of development (R6). However, isolation frequencies of Colletotrichum were greater from tissues collected at R6 than at R8. Isolation frequencies compared between pod and seed tissue were similar for almost all the fungi except Alternaria, Phoma, and Nigrospora. The primary pathogenic species identified from the Diaporthe/Phomopsis complex were D. phaseolorum var. caulivora and D. phaseolorum var. sojae at 28.2% of the total isolation frequencies compared to D. phaseolorum var. meridionalis and Phomopsis longicolla that were identified from 1% of the total samples. The pod tissue harbored greater numbers of fungi than seeds during this study. In statistical comparisons of the peduncle, middle, and stylar regions from pods, no differences in isolation frequencies were found for the cultivars tested regardless if pod tissues or seeds were compared. In summary, the percent isolation frequency of pathogenic fungi from pod and seed at R6 was an effective indicator of the potential for increased disease severity. Furthermore, the significantly greater occurrence of D. phaseolorum var. caulivora and D. phaseolorum var. sojae compared to the other Phomopsis/Diaporthe spp. (e.g. D. phaseolorum var. meridionalis) in southern Indiana will enable scientists to continue to concentrate their breeding efforts for resistance to control these two major pathogens.

Smallseed Falseflax (Camelina microcarpa) Management in Oklahoma Winter Wheat

2021 ◽  
pp. 1-14
Author(s):  
Jodie A. Crose ◽  
Misha R. Manuchehri ◽  
Todd A. Baughman
Keyword(s):  
Winter Wheat ◽  
Weed Control ◽  
Herbicide Resistance ◽  
Wheat Yield ◽  
Acetolactate Synthase ◽  
Growing Season ◽  
Time Of Application ◽  
Adequate Control ◽  
Growing Seasons

Abstract Three herbicide premixes have recently been introduced for weed control in wheat. These include: halauxifen + florasulam, thifensulfuron + fluroxypyr, and bromoxynil + bicyclopyrone. The objective of this study was to evaluate these herbicides along with older products for their control of smallseed falseflax in winter wheat in Oklahoma. Studies took place during the 2017, 2018, and 2020 winter wheat growing seasons. Weed control was visually estimated every two weeks throughout the growing season and wheat yield was collected in all three years. Smallseed falseflax size was approximately six cm in diameter at time of application in all years. Control ranged from 96 to 99% following all treatments with the exception of bicyclopyrone + bromoxynil and dicamba alone, which controlled falseflax 90%. All treatments containing an acetolactate synthase (ALS)-inhibiting herbicide achieved adequate control; therefore, resistance is not suspected in this population. Halauxifen + florasulam and thifensulfuron + fluroxypyr effectively controlled smallseed falseflax similarly to other standards recommended for broadleaf weed control in wheat in Oklahoma. Rotational use of these products allows producers flexibility in controlling smallseed falseflax and reduces the potential for development of herbicide resistance in this species.

Detention of In-Patients under Section 5(2) of the Mental Health Act 1983

1998 ◽  
Vol 38 (1) ◽  
pp. 10-16 ◽  
Author(s):  
Emad Salib ◽  
Boni Iparragirre
Keyword(s):  
Mental Health ◽  
Hospital Stay ◽  
Clinical Diagnosis ◽  
Length Of Hospital Stay ◽  
The Other ◽  
Short Term ◽  
Time Of Application ◽  
Mental Health Act ◽  
Equal Chance

All applications of s.5(2) of the Mental Health Act 1983, allowing the emergency detention of voluntary in-patients in North Cheshire between 1985 and 1995, were reviewed to examine general trends in its use and to assess variables likely to influence its outcome. Of the 877 applications implemented (4% of all admissions), 500 (57%) were converted to longer-term detention under the Act, 396 (45%) were converted to s.2 and 104 (12%) to s.3. The other 377 (43%) detained patients under s.5(2) regained informal status. The review found that time of application of section, length of hospital stay prior to application, medical officer's grade, use of s.5(4) and clinical diagnosis are best predictors of s.5(2) outcome. The results are similar to other published studies and seem to reflect a national pattern, possibly implying that patients detained under this short-term detention order have an almost equal chance of either regaining their voluntary status or being detained under another section by the end of the 72 hours. This may raise questions about the purpose of s.5(2) as expressed by the Mental Health Act Commission.

scholarly journals Prevention and Detection of ARP Spoofing and Man-In-The-Middle Attacks using EDMAC-IP Algorithm

2020 ◽  
Vol 9 (1) ◽  
pp. 1736-1740
Keyword(s):  
The Other ◽  
Address Resolution Protocol ◽  
Man In The Middle ◽  
Timing Data ◽  
Arp Spoofing ◽  
Normal Utilization

The great Man-in - the-Middle assault is centered around convincing two has that the other host is the machine in the center. In the event that the framework utilizes DNS to order the other host or address goals convention (ARP) ridiculing on the LAN, this might be accomplished with an area name parody. This paper targets presenting and delineating ARP ridiculing and its job in Man-in - the-Middle assaults. The expression "Man-in - the-Middle" is normal utilization—it doesn't imply that these assaults must be utilized by individuals. Maybe progressively sensible wording would be Teenager-in - theMiddle or Monkey-in - the-Middle. Progressively contact the assault can be identified using timing data much of the time. The most widely recognized kind of assaults happen because of reserve harming of Address Resolution Protocol (ARP), DNS satirizing, meeting commandeering, and SSL seizing

scholarly journals Fuzzy logic based prediction of micronutrients demand for harumanis mango growth cycles

2021 ◽  
Vol 2107 (1) ◽  
pp. 012048
Author(s):  
W M Nooriman ◽  
A H Abdullah ◽  
N Abdul Rahim ◽  
Erdy Sulino Mohd Muslim Tan
Keyword(s):  
Fuzzy Logic ◽  
Mangifera Indica ◽  
Optimal Growth ◽  
Growth Stages ◽  
Moderate Amount ◽  
Application Timing ◽  
Logic Control ◽  
K Fertilizer ◽  
The Right ◽  
Fertilizer Solution

Abstract Harumanis is a famous green eating mango cultivar that has been commercially cultivated in Malaysia’s state of Perlis. A variety of nutrients are found in soil, all of which are necessary for plant growth. Micronutrients such as Nitrogen (N), Phosphorus (P), and Potassium (K) are essential for Harumanis mango (Mangifera Indica) to growth. The importance of soil fertility in achieving high plant productivity and quality cannot be overstated. It should be used in a moderate amount and in a balanced manner. Predicting appropriate nutrients and the right timing to satisfy the tree’s demands is critical. The aim of this study is to create for Harumanis mango a fuzzy logic-based system to analyse the results of soil tests for nitrogen (N), phosphorus (P), and potassium (K) in the Harumanis mango orchard. The interpreted data are used to estimate N-P-K nutrient levels and indicate the optimal fertilizer solution and application timing for each Harumanis growth stages. The system utilizes Fuzzy Logic Control (FLC) to predict the nutrients demand for Harumanis mango growth. Results shows the system able to calculate and predict values of required N-P-K fertilizer for optimal growth. Thus, assist farmers in predicting the proper amount of N-P-K to apply to Harumanis mango soil.

Studies on Maize (Zea mays) at Bunda, Malawi. I. Yield in Relation to Rainfall

1989 ◽  
Vol 25 (3) ◽  
pp. 357-366 ◽  
Author(s):  
D. MacColl
Keyword(s):  
Zea Mays ◽  
Growing Season ◽  
The Other ◽  
Negative Effects ◽  
Total Rainfall ◽  
Fertilizer Nitrogen ◽  
Late Planting ◽  
High Rainfall ◽  
Nitrogen Levels

SUMMARYYields of maize were determined in six years, on two soils, at up to four nitrogen levels following early and late planting. Without fertilizer nitrogen, high rainfall at the beginning of the growing season reduced yield on one soil but not on the other, while high rainfall at late silking and high total rainfall in the growing season reduced yields on both soils. As the level of fertilizer nitrogen increased, the negative effects of rainfall on yield tended to disappear. A three week delay in planting sometimes increased and sometimes decreased yield. The probable reasons for the observed effects of rainfall on yield are discussed.

Sign in / Sign up

Export Citation Format

Share Document