<8 NATURAL CONTROL OF VTHITE FLIES IX FLORIDA. 
Page. 
Sulphur waters, effect on spores of fungi 56 
Sweet gum. (See Liquidambar styraciflua.) 
Tangerine (see also Citrus, Grapefruit, and Orange). 
food plant of Aleyrodes citri and Aleyrodes nubifera 12 
Unexplained mortality of white flies in Florida 11-17 
Verticillium heterocladum, description 37-38 
distribution 38 
effectiveness 38 
history ' 37 
insects attacked 38 
parasite of (Lecanium ) Coccus hesperidum 37 
Verania cardoni, enemy of citrus white fly 9 
"Weather conditions in relation to fungous infections of white flies 57 
White flies in Florida, control by climatic conditions 10 
curling and dropping of leaves from drought. 19 
dropping from leaves 18 
fungous diseases 20-73 
overcrowding 18-19 
parasitic and predatory enemies 8-9 
unexplained causes 11-17 
fungi of little or no value as parasites 32-38 
natural control 1-73 
summary and conclusions 70-73 
fly, citrus (see also Aleyrodes citii). 
control by bacterial diseases 19 
climatic conditions 10 
overcrowding r 18-19 
host of JEgerita ivebberi 31 
Aseherson ia aleyrodis 24, 25 
fiavo-citrina 26, 27 
S phzrostilbe coccophila 38 
infection with Microcera sp 33 
Sporotrich urn 35, 36 
natural control, personnel engaged in investigations 7 
on Ligustrum spp. and Gardenia jasminoides 10 
parasitic and predatory enemies 8-9 
unexplained mortality 11-17 
cloudy- winged (see also Aleyrodes nubifera). 
control by bacterial diseases 19 
climatic conditions 10 
overcrowding 18-19 
host of JEgerita uebberi 31 
Aschersonia aleyrodis 24 
flavo-citrina 26, 27 
Sphserostilbe coccophila 38 
infection with Microcera sp 33 
Sporotrichum 35, 36 
parasitic and predatory enemies 8-9 
unexplained mortality 11-17 
Winds, strong drying, in control of citrus and cloudy- winged white flies 10 
o 
