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Title: HOSTS OF SILVERLEAF WHITEFLY IN IMPERIAL AND SOUTHERN SAN JOAQUIN VALLEYS, CALIFORNIA

Author
item NATWICK, ERIC - U CA COOP EXT HOLTVILLE
item SUMMERS, C - U CA, RIVERSIDE, CA
item CHU, CHANG CHI
item GODFREY, L - U CA, RIVERSIDE, CA
item MAYBERRY, K - U CA COOP EXT, HOLTVILLE
item BELL, C - U CA COOP EXT, HOLTVILLE
item HENNEBERRY, THOMAS

Submitted to: Sweetpotato Whitefly Progress Review Proceedings
Publication Type: Abstract Only
Publication Acceptance Date: 7/1/2000
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: Plants growing within or around agriculture fields, along fence rows, roadways, waterways, and in urban areas were examined for the presence of silverleaf whiteflies in the Imperial and Southern San Joaquin Valleys, California. A plant was a host when it supported the three life stages (eggs, nymphs and pupal exuvia) of silverleaf whiteflies. When eggs, nymphs and pupal exuvia were not found, the plant species was designated a a non-host species. Leaves from ten plants each species were examined. We have examined 334 plant species since 1991 and found 242 plant species were hosts of silverleaf whiteflies. Numbers of hosts and non-host species, respectively, for each group of plants were: agronomic crops 11 and 7, vegetable crops 47 and 4, ornamental plants 106 and 72, fruit trees 18 and 5, and weed species 60 and 6. Of the 242 host plant species 149 of them were overwintering hosts. The overwintering hosts included one agronomic crop (alfalfa), 24 vegetable crops, 99 ornamental plant species, 15 fruit tree species, and 20 weed species. This wide host range provides a continuity of year-round plant habitats for B. argentifolii reproduction, survival and overwintering.