|
|
|
|
|
| FAROOQ,N.; ABBAS,T.; TANVEER,A.; JAVAID,M.M.; ALI,H.H.; SAFDAR,M.E.; KHAN,A.; ZOHAIB,A.; SHAHZAD,B.. |
| ABSTRACT: Resistance evolution in weeds against all major herbicide groups demand investigations to identify various factors responsible for resistance development. Herbicide hormesis has not yet been included in the list of factors promoting the evolution of resistance. Studies were conducted to evaluate the degree of hormesis in fenoxaprop-p-ethyl susceptible and resistant Phalaris minor to provide a first indication of whether hormesis is a potential factor in the development of resistance. In the first experiment, a wide range of doses up to 160% of the recommended field rate was used to identify potential hormetic doses for resistant and susceptible P. minor populations. Doses below 40% have been designated as potential hormetic doses. In the second... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: ACCase hormesis; Resistant Phalaris minor; Resistance avoidance. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100244 |
| |
|
|
| SIBTAIN,M.; TANVEER,A.; JAVAID,M.M.; ALI,H.H.. |
| Chickpea yield potential is limited by weed competition in typical chickpea growing areas of Pakistan where zero tillage crop grown on moisture conserved from rains received during the months of September and August. The objective of this work was to evaluate the growth and yield characteristics of chickpea grown in coexistence with increasing densities of wild onion (Asphodelus tenuifolius). The experiment was comprised of six density levels viz. zero, 20, 40, 80, 160 and 320 plants m-2 of A. tenuifolius. A decrease in chickpea primary and secondary branches per plant, pods per plant, seeds per pod, 100-seed weight and seed yield was observed due to more accumulation of dry matter per increasing densities of A. tenuifolius. The increase in A. tenuifolius... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cicer arietinum; Weed density; Yield components; Grain yield. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000100067 |
| |
|
|
| TANVEER,A.; JAVAID,M.M.; ABBAS,R.N.; ALI,H.H.; NAZIR,M.Q.; BALAL,R.M.; SHAHID,M.A.. |
| ABSTRACT Catchfly (Silene conoidea), an annual herb, is usually recognized as an emerging weed species in Eurasia and North America. The presence of somatic seed polymorphism might aid in the adaptation of this weed in different climatic conditions. We conducted laboratory and greenhouse experiments to study the seed polymorphism and influence of various environmental factors like temperature, salt stress, osmotic stress and burial depth on the germination and emergence characteristics of catchfly. Optimum germination of seeds of all colors was recorded at a temperature of 15 oC. Germination of catchfly seeds of all colors followed decreasing trend as NaCl concentration increased from 50 mM to 200 mM. Seed germination was maximum (87-96%) at 0 MPa but... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Polymorphism; Catchfly; Germination ecology. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100220 |
| |
|
|
| ,UMM-E-KULSOOM; KHAN,M.A.; ALI,H.H.; ALI,L.; RIZWAN,M.S.; MAHMOOD,A.; RAZA,A.; JAVAID,M.M.. |
| ABSTRACT: Crop-weed competition and interactions are the focus of many researchers to make the weed management decision accurate and economical. Therefore, field studies were conducted in two consecutive years (2012-13 and 2013-14) at two different locations viz Peshawar (34.0167o N, 71.5833o E) and Chitral (35o50’46" N, 71o47’9" E) of Khyber Pakhtunkhwa (KPK) province, Pakistan. The aim of the studies was to determine the competitive ability of wild oat (Avena fatua L.) with wheat (Triticum aestivum L.) at two ecologically different locations and the possible effects on quantity and quality of wheat grains. In field studies, the experiment were laid out in randomized complete block design (additive design) with three replications in which the seed rate of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Weed-crop competition; Wild oat; Plant density; Suppression; Yield losses. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100241 |
| |
|
|
| JAVAID,M.M.; ZIA,A.U.H.; WAHEED,H.; NARGIS,J.; SHAHID,A.; AZIZ,A.; WASAYA,A.. |
| ABSTRACT: Among various weed management strategies, chemical weed control is considered the most effective method. However, optimum dose and suitable combination of herbicide with adjuvants play a vital role in controlling weeds at an acceptable level and produce maximum crop yield. A field study was conducted to investigate the effect of post-emergence herbicide isoproturon alone or with combination of adjuvants on winter wheat and its associated weeds. The treatments were isoproturon at 175 g a.i. ha-1, 140 g a.i. ha-1 and 105 g a.i. ha-1 applied alone or with adjuvants Ad-500 or Bio-enhancer at 400 mL ha-1 each and weedy check as a control treatment. Isoproturon at 175 g a.i. ha-1 + Bio-enhancer at 400 mL ha-1 was most effective treatment for control of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fresh and dry weight; Gas exchange traits; Growth and yield; Herbicide doses; Triticum aestivum L.; Weed control. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100224 |
| |
|
| |
|
|
| JAVAID,M.M.; TANVEER,A.; ALI,H.H.; SHAHID,M.A.; BALAL,R.M.; AQEEL,M.A.. |
| Emex australis and E. spinosa are significant weed species in wheat and other crops. Information on the extent of competition of the Emex species will be helpful to access yield losses in wheat. Field experiments were conducted to quantify the interference of tested weed densities each as single or mixture of both at 1:1 on their growth and yield, wheat yield components and wheat grain yield losses in two consecutive years. Dry weight of both weed species increased from 3-6 g m-2 with every additional plant of weed, whereas seed number and weight per plant decreased with increasing density of either weed. Both weed species caused considerable decrease in yield components like spike bearing tillers, number of grains per spike, 1000-grain weight of wheat... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Triticum aestivum; Yield loss; Weed competition; Emex australis; Emex spinosa. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000100035 |
| |
|
|
|
