Publications

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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 ...200717370807
revision of platycheirus lepeletier and serville (diptera: syrphidae) in the nearctic north of mexico.the 75 nearctic species of platycheirus lepeletier and serville found north of mexico are revised, including five species new to north america: platycheirus alpigenus barkalov and nielsen, platycheirus brunnifrons nielsen, platycheirus clausseni nielsen, platycheirus speighti doczkal, stuke & goeldlin, and platycheirus splendidus rotheray. platycheirus rufimaculatus vockeroth, melanostoma willistoni goot, and melanostoma concinnus snow are recognized as junior synonyms of platycheirus pictipes ( ...201627394216
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