Martin M. Williams II Corresponding author. U.S. Department of Agriculture—Agricultural Research Service, Invasive Weed Management Research, University of Illinois, 1102 S. Goodwin Ave., Urbana, IL 61801; [email protected] The critical period for weed control (CPWC) identifies the phase of the crop growth cycle when weed interference results in unacceptable yield losses; however, the effect of ...

The critical period for weed control (CPWC) is the period in the crop growth cycle during which weeds must be controlled to prevent unacceptable yield losses. Field studies were conducted in 2005 and 2006 in the University of Birjand at the south east of Iran to determine CPWC of corn using a randomized complete block design with 14 treatments and four replications. The treatments consisted of ...

The present investigation was conducted at Agronomy Research Farm, Acharya Narendra Deva University of Agriculture and Technology, Kumarganj, Ayodhya (U.P.) during Rabi season 2019-20. experiment laid out in Factorial Randomized block design with three replications keeping four fertility levels viz., 100% RDF-IF (150 kg/h), 125% (25% through FYM), RDF + 25%RDN FYM, 75%RDF-IF+25%RDN FYM weed man...

The growth, yield attributes and of clusterbean were influenced by various weed management treatments. objective the current study was to evaluate impact different practices on overall yield. An agronomic investigation conducted at Agricultural Research Station, Mandor, affiliated with Agriculture University, Jodhpur, Rajasthan, during Kharif season 2018. experimental design utilized a randomiz...

Impact of weed-crop competition periods on the yield and parameters mungbean was investigated during spring summer season 2018 at Agronomic Research Farm, Bahauddin Zakariya University, Multan. Treatments comprised different periods, weeds were allowed to compete for 15, 30, 45 60 days with after sowing. For comparison, weed free weedy check plots also maintained. Results revealed importance co...

Certified Crop Advisors of Arkansas and members of the Arkansas Crop Consultants Association were surveyed in fall 2006 through direct mail to assess current weed management practices and needs in rice from both a research and educational perspective. Consultants reported scouting 564,000 of the possible 1,400,000 acres (40%) of rice grown in Arkansas. Preemergence herbicides most often recomme...

In order to optimize the application of herbicides in weed-crop systems, accurate and timely weed maps of the crop-field are required. In this context, this investigation quantified the efficacy and limitations of remote images collected with an unmanned aerial vehicle (UAV) for early detection of weed seedlings. The ability to discriminate weeds was significantly affected by the imagery spectr...

in order to determine the critical period of weed control (cpwc), yield and yield components of black seed (nigella sativa l.) affected by weed competition and control periods, a field experiment was conducted based on randomized complete block design with 12 treatments and three replications at the agricultural research station, ferdowsi university of mashhad, iran in 2012. two sets of weed-in...

A field investigation was run to ascertain the critical period of weed control in jute (Corchorus olitorius). The study consisted two distinct sets treatments, with one set weeds being left invade crop for a longer time, specifically, 15, 30, 45 and 60 days after sowing (DAS) up harvest. In other plants remained weed-free progressively periods, i.e., DAS, until reduction fibre yield (FY) record...