Group Title: ARC-A research report - Agricultural Research Center-Apopka ; RH-80-5
Title: Evaluation of the Eco Guardian pest control system for control of spider mites and mealybugs infesting tropical foliage
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Permanent Link: http://ufdc.ufl.edu/UF00065937/00001
 Material Information
Title: Evaluation of the Eco Guardian pest control system for control of spider mites and mealybugs infesting tropical foliage
Series Title: ARC-A research report
Physical Description: 3 leaves : ; 28 cm.
Language: English
Creator: Hamlen, R. A ( Ronald Alan ), 1940-
Agricultural Research Center (Apopka, Fla.)
Publisher: IFAS, University of Florida, Agricultural Research Center-Apopka
Place of Publication: Apopka Fla
Publication Date: 1980
 Subjects
Subject: Foliage plants -- Diseases and pests -- Control -- Florida   ( lcsh )
Spider mites -- Control -- Florida   ( lcsh )
Mealybugs -- Control -- Florida   ( lcsh )
Genre: government publication (state, provincial, terriorial, dependent)   ( marcgt )
non-fiction   ( marcgt )
 Notes
Statement of Responsibility: R.A. Hamlen.
General Note: Caption title.
 Record Information
Bibliographic ID: UF00065937
Volume ID: VID00001
Source Institution: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: oclc - 70915074

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TM
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
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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

were included.

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






-3-


Table 1. Effects of continuous exposure of Eco Guardian on spidermite
populations on excised bean leaves in bioassay.


Treatment


Test-1


Average no. of mites per leaf at indicated days
after continuous exposure to Eco Guardian


pre-exposure


Eco Guardian

Unexposed


Test-2


pre-exposufe


13 days

174

188



7 days


Eco Guardian

Unexposed


23 days

270

303



15 days

188

196


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.


on mealybug


Average no. of mealybugs per chamber at indicated
Treatment days after continuous exposure to Eco Guardian


Test-1


pre-exposure


Eco Guardian

Unexposed


Test-2

Eco Guardian

Unexposed


pre-exposure

S 10

10


10 days

172.5

150.0


7 days

9.5

8.0


15 nys

9.0

7.5


Nymphs (immatures) obtained from population developed in Test-1
continuously exposed for 15 days.




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