| Material Information
||Evaluation of the Eco Guardian pest control system for control of spider mites and mealybugs infesting tropical foliage
||ARC-A research report
||3 leaves : ; 28 cm.
||Hamlen, R. A ( Ronald Alan ), 1940-
Agricultural Research Center (Apopka, Fla.)
||IFAS, University of Florida, Agricultural Research Center-Apopka
||Place of Publication:
||Foliage plants -- Diseases and pests -- Control -- Florida ( lcsh )
Spider mites -- Control -- Florida ( lcsh )
Mealybugs -- Control -- Florida ( lcsh )
||government publication (state, provincial, terriorial, dependent) ( marcgt )
non-fiction ( marcgt )
||Statement of Responsibility:
| Record Information
||University of Florida
||All rights reserved by the source institution and holding location.
||oclc - 70915074
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Copyright 2005, Board of Trustees, University
Evaluation of the Eco Guardian pest control system for control of spider
mites and mealybugs infesting tropical folia e-JU-
R. A. Hamlen
IFAS, University of Florida 3 3
Agricultural Research Center Apopka
ARC-A Research Report RH-80-5 I U.S. Ulni
of FlyD orI da
During 1979 a new pest control system, the Eco Guardian was made
available to the Florida commercial foliage industry. According to the
manufacturer, Environmental Health Systems, Inc., this system utilized
low power solid state-space age circuitry which effected the subtle
natural magnetic waves of the earth to upset the equilibrium of insects.
This system was advertibd as an effective, nonpolluting and nonpoisonous
approach to pest control. In order to evaluate the potential usefulness
of the Eco Guardian pest control system for use in the tropical foliage
industry, a series of controlled experiments were carried out at the
Agricultural Research Center at Apopka in 1979-80.
All experiments were established in room-size (1000 cu ft) chambers
at 690-81F, 38% relative humidity and under 140 ft candles illumination
for a 12 hr period. Test pest species were the two spotted spider mite,
Tetranychus urticae Koch, and a foliar mealybug, Phenococcus solani
Ferris, both of which are major pests in tropical foliage plant production.
The Eco Guardian unit was positioned so that the experimental area was
to the North of the unit and all exposure distances did not exceed 6 ft.
Bioassay tests Excised bean (Phaseolus sp.) leaves initially infested
with 5 adult female spider mites were maintained in bioassay chambers
and continuously exposed to the Eco Guardian unit. Visual counts of'
resulting mite populations were made for 23 days (Table 1, Test-1).
A second test (Table 1, Test-2) was carried out utilizing 5 adult female
spider mites obtained from the population that resulted in Test-i after
the continuous exposure to the Eco Guardian unit for 28 days. A series
of unexposed controls also were maintained. The data listed in Table 1
demonstrated that no reduction in spider mite populations resulted after
more than 1 month of continuous exposure to the Eco Guardian unit. A
second bioassay experiment was carried out using 2 adult parthenogenetic
female mealybugs in bioassay chambers containing leaves of Gynura sp.
Mealybugs were exposed to the Eco Guardian unit and the resulting popu-
lations were counted after 10 days of continuous exposure (Table 2, Test-1),
In an additional test (Table 2, Test-2), 10 nymphs (Immatures) obtained
from the population resulting from Test-1 were continuously exposed to
the Eeo Guardian unit for an additional 15 days. Table 2 shows that no
reduction in mealybug populations resulted after approximately 1 month of
continuous exposure to the Eco Guardian unit. Again unexposed controls
Plant tests Populations of spider mites on container grown Diefferbachia
and Brassaia were maintained in both exposed and unexposed (control)
chambers for 6 weeks. Populations of spider mites were visually counted
on leaves at weekly intervals. Data in Table 3 indicates there was no
control of spider mite populations during the exposure period.
The results of these studies indicate that the Eco Guardian system
does not effectively suppress populations of T. urticae or P. solani under
the test conditions utilized in these evaluations.
Table 3. Effect of continuous exposure of Eco Guardian on spidermite
populations on Dieffenbachia and Brassaia.
Average no. of spidermites per leaf after indicated
weeks of continuous exposure to Eco Guardian
Treatment pre-exposure 1 2 3 4 5 6
Eco Guardian 32.3 58.6 71.1 69.3 54.8 42.1 32.6
Unexposed 34.6 37.2 44.3 43.7 46.0 47.0 38.7
Table 1. Effects of continuous exposure of Eco Guardian on spidermite
populations on excised bean leaves in bioassay.
Average no. of mites per leaf at indicated days
after continuous exposure to Eco Guardian
Adult mites obtained from population developed in Test-1 continuously
exposed for 28 days.
st* i *
Table 2. Effects of continuous exposure of Eco Guardian
populations in bioassay chambers.
Average no. of mealybugs per chamber at indicated
Treatment days after continuous exposure to Eco Guardian
Nymphs (immatures) obtained from population developed in Test-1
continuously exposed for 15 days.