| a survey of syrphid predators of nasonovia ribisnigri in organic lettuce on the central coast of california. | organic lettuce, lactuca sativa l., producers on california's central coast rely on endemic syrphid flies (diptera: syrphidae) to suppress populations of nasonovia ribisnigri mosley (homoptera: aphididae) and other aphids affecting lettuce. growers are using various forms of habitat manipulation to enhance biological control. we surveyed syrphids collected from organic romaine in and around the salinas valley from march through september 2005 to gain a better understanding of the species respons ... | 2007 | 17370807 |
| evidence of protaphorura fimata (collembola: poduromorpha: onychiuridae) feeding on germinating lettuce in the salinas valley of california. | a series of experiments were conducted to determine the impact of protaphorura fimata gisin (family: onychiuridae) feeding on seeds and germinating seedlings of lettuce, lactuca sativa l. (asteraceae). first, various densities of p. fimata were incubated with 25 lettuce seeds for 7 d and feeding injury was evaluated in three soilless arena experiments. as a second step, 100 p. fimata were incubated with 25 lettuce seeds in three arena experiments with soil media. finally, in a commercial field t ... | 2015 | 26470124 |
| 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 |
| quantitative trait loci associated with seed and seedling traits in lactuca. | seed and seedling traits related to germination and stand establishment are important in the production of cultivated lettuce (lactuca sativa l.). six seed and seedling traits segregating in a l. sativa cv. salinas x l. serriola recombinant inbred line population consisting of 103 f8 families revealed a total of 17 significant quantitative trait loci (qtl) resulting from three seed production environments. significant qtl were identified for germination in darkness, germination at 25 and 35 degr ... | 2005 | 16177902 |