| leaf microbiota in an agroecosystem: spatiotemporal variation in bacterial community composition on field-grown lettuce. | the presence, size and importance of bacterial communities on plant leaf surfaces are widely appreciated. however, information is scarce regarding their composition and how it changes along geographical and seasonal scales. we collected 106 samples of field-grown romaine lettuce from commercial production regions in california and arizona during the 2009-2010 crop cycle. total bacterial populations averaged between 10(5) and 10(6) per gram of tissue, whereas counts of culturable bacteria were on ... | 2012 | 22534606 |
| transfer of escherichia coli o157:h7 from simulated wildlife scat onto romaine lettuce during foliar irrigation. | a field trial in salinas valley, california, was conducted during july 2011 to quantify the microbial load that transfers from wildlife feces onto nearby lettuce during foliar irrigation. romaine lettuce was grown using standard commercial practices and irrigated using an impact sprinkler design. five grams of rabbit feces was spiked with 1.29 × 10(8) cfu of escherichia coli o157:h7 and placed - 3, - 2, and - 1 days and immediately before a 2-h irrigation event. immediately after irrigation, 168 ... | 2015 | 25710137 |
| role of syrphid larvae and other predators in suppressing aphid infestations in organic lettuce on california's central coast. | organic lettuce, lactuca sativa l., growers on the central coast of california rely on conservation biological control to manage nasonovia ribisnigri mosley (hemiptera: aphididae) and other aphid pests of lettuce. in 2006, we carried out five replicated field trials to determine the importance of syrphid larvae in the suppression of n. ribisnigri and other aphids infesting organic romaine lettuce. we used entrust, a spinosad-based insecticide approved for use on organic farms, to suppress syrphi ... | 2008 | 18950033 |