A5000419645- Weed Control and Herbicide Applications
- Plant Disease Management Techniques
- Pesticide and Herbicide Environmental Studies
- Allelopathy and phytotoxic interactions
- Berry genetics and cultivation research
- Plant tissue culture and regeneration
- Pesticide Residue Analysis and Safety
- Growth and nutrition in plants
- Plant and animal studies
- Banana Cultivation and Research
- Plant Pathogens and Fungal Diseases
- Pesticide Exposure and Toxicity
- Fungal Plant Pathogen Control
- Plant Physiology and Cultivation Studies
- Agronomic Practices and Intercropping Systems
- Nematode management and characterization studies
- Flowering Plant Growth and Cultivation
University of California, Davis
2010-2022
The performance of the Robovator (F. Poulsen Engineering ApS, Hvals⊘, Denmark), a commercial robotic intrarow cultivator, was evaluated in direct-seeded broccoli and transplanted lettuce during 2014 2015 Salinas, CA, Yuma, AZ. main objective to evaluate crop stand after cultivation, yield, weed control efficacy compared with standard cultivator. A second compare hand weeding time cultivation within complete integrated management (IWM) system. Herbicides were included as component IWM did not...
A commercial intrarow rotating cultivator was tested for weed removal and impact on hand-weeding times in bok choy, celery, lettuce, radicchio. The as an automated crop thinner weeder direct-seeded choy lettuce alternative to hand-thinning -weeding. utilized machine-vision guidance align a disk with the plant be saved remove weeds undesired plants. compared standard interrow cultivator, which could not from line. Main plots were type, rotating, or standard, subplots herbicides: pronamide...
Machine-vision cultivator guidance systems are commercially available to growers, but little work has been done determine if these can improve integrated weed management in vegetable crops. Studies were conducted 2005 and 2006 broccoli lettuce evaluate band-applied DCPA or pronamide, respectively, four noncultivated bands ranging from 5.1 12.7 cm. pronamide applied centered on the seed line at 0, 7.6 cm wide. A commercial machine-vision system was used guide a cultivator. Generally,...
Few herbicides are available for use in lettuce and hand weeding is required commercially acceptable weed control. More effective needed. Here field evaluations of pendimethalin S -metolachlor control transplanted reported. Pendimethalin was evaluated PRE at rates between 0.6 6.7 kg ai ha −1 , POST 1.1 2.2 . Both applications were safe to provided similar higher better than the industry standard, pronamide 1.3 -Metolachlor 5.6 up 2.8 caused little or no crop injury yield reduction lettuce,...
Field studies were conducted from 2009 to 2011 in Oregon and 2006 2008 California evaluate the response of various crops imazosulfuron soil residues 91 731 d after application (DAA). Imazosulfuron rates applied 224 or 450 g ai ha −1 PRE, sequential PRE POST, as a tank mixture with S -metolachlor at 1,060 followed by POST potato. was on bare ground 224, 336, sequentially California. Sugar beet planted 364 458 DAA injured 83 94% 54 78% among timing 2007 2008, respectively. Alfalfa 701 greater...
Fresh market spinach has one primary herbicide, cycloate, which does not control all weeds. Previous studies demonstrated that cycloate PRE followed by (fb) phenmedipham at the four-leaf stage is a safe and effective treatment. However, this treatment useful for main growing season of fresh due to its short crop cycle 21-d preharvest interval requirement phenmedipham. This study evaluates potential use combination fb on two-leaf spinach. Greenhouse field were conducted in 2014 using three...
A sulfonylurea (SU) herbicide resistance allele discovered in prickly lettuce was previously transferred to domestic with the cultivar name ‘ID-BR1’. ID-BR1 acquired, and SU through traditional breeding methods five common commercial types: butterhead, crisphead, green leaf, red romaine. Field trials were conducted at Salinas, CA during 2011 2012 evaluate POST applications of tribenuron-methyl (tribenuron) on SU-susceptible SU-resistant types. Treatments included a nontreated control,...
Fresh market spinach has limited herbicides available and weed management in this crop is dependent on hand-weeding. Phenmedipham a POST herbicide registered for use grown processing or seed, but not fresh spinach. This study evaluates the potential of phenmedipham alone combination with cycloate control production. Greenhouse field studies were conducted 2013 using two varieties known to have low high tolerance phenmedipham. The greenhouse showed that at 270 550 g ai ha −1 was safe when...
Continuous planting of lettuce from December to September each year in the Salinas Valley California requires preparation raised fallow beds ready for planting. Application soil residual herbicides during winter periods controls weeds but must be used with caution because germinating seedlings are very sensitive herbicide residues. Three were applied at about 90, 60, and 30 d before was seeded. Herbicides tested flumioxazin 71, 105, 211 g ai ha −1 , two formulations oxyfluorfen 280 560...
The few available herbicides for fresh market spinach do not provide adequate weed control, and there is need additional herbicide tools. Phenmedipham registered use in processing but spinach, because of potential injury the short interval between application harvest. objectives this study were to evaluate tolerance level varieties phenmedipham impact light intensity on phenmedipham. In greenhouse, nine treated with (0.55 kg ai ha −1 ). Spinach exhibited a wide range tolerance, dry weights...
Abstract Small-acreage brassica vegetables need additional herbicide options. Among the grown in California are a number of niche crops, such as bok choi and brussels sprouts, that have limited registered herbicides, DCPA. Sulfentrazone S -metolachlor food use tolerances for on head stem Group 5-16, which includes crops like well leafy greens Subgroup 4-16B, kale. However, there is lack data sulfentrazone wide variety seeded transplanted vegetables. applied preemergence (PRE) was evaluated...
Abstract Sulfentrazone was recently granted food-use tolerance approval for use on Brassica head and stem, as well leafy vegetables. To date, one sulfentrazone registrant has listed those crops its label. In coastal California multiple per year including vegetables are grown in rapid succession; therefore, to avoid injury rotational crops, herbicides used fields must be carefully selected. Given concerns about the relatively long soil persistence of sulfentrazone, studies were conducted...