| Material Information
||Preliminary Cuban may beetle report
||1 leaf : ; 28 cm.
||Wolfenbarger, D. O ( Daniel Otis ), 1904-
Sub-Tropical Experiment Station
||University of Florida, Sub-Tropical Experiment Station
||Place of Publication:
||Scarabaeidae -- Florida ( lcsh )
Shrubs -- Diseases and pests -- Florida ( lcsh )
||government publication (state, provincial, terriorial, dependent) ( marcgt )
non-fiction ( marcgt )
||Statement of Responsibility:
||Mimeographed report (Sub-Tropical Experiment Station) ;
| Record Information
||University of Florida
||All rights reserved by the source institution and holding location.
||oclc - 71816802
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not reflect current scientific knowledge
or recommendations. These texts
represent the historic publishing
record of the Institute for Food and
Agricultural Sciences and should be
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Copyright 2005, Board of Trustees, University
Mimeographed Report No. SUB65-2 May, 1965
University of Florida
SUB-TROPICAL EXPERIMENT STATION
PRELIMINARY CUBAN MAY BEETLE REPORT
D. 0. Wolfenbarger
A scarab beetle, called the Cuban may beetle, is very abundant in Miami, Florida,
and is injurious to plants, principally Trema sp. (a native shrub) although it has
also defoliated mahogany and lychee trees. Where it is locally abundant, it has a
wide range of host plants, including citrus and sapote. Beetles fly to leaves where
they eat and feed on the interveinal areas often leaving only the midrib.
The beetle was given its name because it is a scarab beetle related to the may
beetles known to many people and because it was recognized in Cuba before it was
found in Miami. The species is known only in these two areas.
Other species in the area are easy to confuse with the Cuban may beetle as to size
and color. It is, however, without marked distinguishing characteristics, except
as a darker brown stripe may be recognized along the middle of the back. It is of
a light brown color, and is a little less than inch in length. Since it flies
and feeds after dark it may be found on the plants after dark and usually in large
numbers on the leaves. The insect spends the daylight hours under leaves and twigs
among stones or plant debris on the soil surface.
Larvae live in the soil as characteristic C-shaped white grubs, attaining lengths
of almost inch. Food of the larvae is unknown. Root injuries to plants were
looked for but not seen. It is suspected that the larvae glean nourishment from
leaf and twig materials as they decompose.
Beetles are most abundant during early May although a second less abundant peak of
emergence comes in September or October.
Control of adults has been accomplished by spraying the foliage of Trema with DDT,
2E, at 1 qt. per 50 gallons of water, and it has been effective at weekly intervals.
Control of larvae is accomplished more easily and probably more effectively, how-
ever, by spreading aldrin, dieldrin or heptachlor on the ground at four pounds
technical material or of chlordane at six pounds technical material per acre. It
is recommended that any of these used be "washed in" with water and used about once
per year, perhaps in July or August. These figures based on 100 sq. ft. of area
are near 1/6 oz. and 1/5 oz. respectively. These materials may be applied as
granular, emulsive or wettable powder formulations. The dealer or local Extension
Service agent will help to calculate the material needed to treat individual areas.
Larvae control is recommended for home owners.
Observations suggest that the beetles likely remain near their orgin; i.e., they
do not fly far nor do the larvae move far from the place where they hatched from
eggs. Control efforts by one resident on a small area will be effective because
beetles will come from adjoining property in small numbers.