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FLORIDA ENTOMOLOGIST 
Official Organ of The Florida Entomological Society, Gainesville, 
Florida. 
PROFESSOR). WATSON 20 oe eee oe eee Editor 
DR? WELUMON NEW Bic) se Seen ee ee Associate Editor 
DR Wi. BERGER &: <0 o ene. See en eee eee Business Manager 
Issued once every three months. Free to all members of the 
Society. 
Subscription price to non-members is $1.00 per year in ad- 
vance; 25 cents per copy. 
ENTOMOLOGICAL PAPERS AT THE CITRUS SEMINAR 
On Oct. 5 Mr. W. W. Yothers read a paper on ‘Some Funda- 
mentals of Grove Pest Control.” He stated that there are three 
possible viewpoints: (1) To do nothing, leaving the control of 
the pests to their natural enemies. (2) To take such measures 
as will reduce their numbers to the point of commercial control. 
This will necessitate frequent repetitions of the control mea- 
sures. (3) To eradicate the pest—expensive in the first costs 
but perhaps often cheapest in the end. Which method should 
be pursued will depend upon the insect. Or a combination of 
the methods will often be most practical. 
Mr. Yothers also read a very valuable paper by Dr. A. T. 
Speare of the U. S. Bur. of Ent., founded on work done in Mr. 
Yothers’ laboratory at Orlando. It has long been a matter of 
common observation that the citrus rust mites and mealy bugs 
tend to disappear with the advent of the rainy season. It has 
been generally supposed that this was due to their being washed 
off by the heavy rains. But according to Dr. Speare the true 
cause is the rapid development of two fungi under the influence 
of the high humidity of the rainy season. The fungus which 
infects the rust mites is a species of Cordiceps. Infected rust 
mites may be recognized by their shrunken appearance and of 
course absence of movement. The fungus which attacks the 
mealy bugs is an undescribed species of Extomophora. Infested 
mealy bugs may be recognized by their soft spongy texture. 
Under a sharp knife they can be cut like cheese. 
These discoveries are not only of great scientific interest but 
of equal practical importance. If a grower finds that one of 
these fungi is rapidly developing in his grove, under suitable 
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