| aphid specific predators in potato in belgium. | in summer 2003, aphid specific predators populations were sampled in four potato fields located in wallonia. ladybirds, hoverflies and lacewings were the most abundant predators collected. a total of 6 ladybird, 8 syrphid and 2 lacewing species was found. predator species composition and abundance greatly differed from field to field, while aphids populations were more or less similar with a peak of 3 to 5 aphid/potato leaf in mid-july. all chrysopidae sampled belong to the chrysoperla kolthoffi ... | 2004 | 15759406 |
| 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 ( ... | 2016 | 27394216 |