Triple layer plastic bag

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EFFECTIVENESS OF THE TRIPLE-LAYER HERMETIC BAG
IN CONTROLLING PROSTEPHANUS TUNCATUS (HORN)
(COLEOPTERA: BOSTRICHIDAE) AND ...

OUTLINE OF PRESENTATION
 INTRODUCTION
 JUSTIFICATION
 OBJECTIVES
 FORMS OF HERMERTIC STORAGE
 MATERIALS AND METHODS
...

INTRODUCTION
 Maize (Zea mais L, from Spanish: maíz after Taíno mahiz) is a
common name for the cereal grass widely grown...

INTRODUCTION CONT’D
 Stored maize is attacked by 20 different species of insect pests including the
maize weevil, Sitophi...

JUSTIFICATION
 Hermetic storage in metal drums is known to provide good control of all
storage insect pests including the...

OBJECTIVES
 The goal of the study was to evaluate the effectiveness of the multi-layer
hermetic bags for the protection o...

Figure 1: Adult P. truncatus
(mag. x100). Source: Hodges R.J.
Figure 2: Larva of P. truncatus
Source: Researcher.
Figure 3...

HERMETIC STORAGE, ORIGIN & TYPES
What is hermetic storage?
We have three types of hermetic storage, these are;
a) Organic-...

FORMS OF HERMETIC STORAGE
Mega cocoon
TranSafeliner GrainPro Bunker
150 tonne cocoon
Cocoon beign ffllled
Outdoor storage
...

MATERIALS AND METHODS
 Experimental site
 Source of maize varieties
 Moisture content of maize used in the study
 Char...

LABORATORY EXPERIMENTS
Effectiveness of the triple-layer bag against P. truncatus and S. zeamais
 This experiment compare...

DETERMINING % DAMAGE, WEIGHT LOSS, MOISTURE
CONTENT, AND % GERMINATION
 Two different sets of experiments were conducted;...

METHODOLOGY CON’T
 Determination of percentage damage
 The percentage damage was calculated using the formula described ...

ASSESSMENT OF WEIGHT LOSS
 Maize grain loss bioassay was conducted to determine the damage caused
by P. truncatus and S. ...

WEIGHT LOSS ASSESSMENT CON’T
Plate 1: A cross-section of the
set up after 3 months
Plate 2: Effect of LGB
on the polypropy...

DETERMINING VIABILITY AND O2 DEPLETION
 The seed viability test was conducted in the laboratory and in the field
(using P...

SOCIO-ECONOMIC BENEFIT ANALYSIS
 This was conducted using the cost-benefit ratio (BCR).
 BCR is simply the ratio of pres...

RESULTS AND DISCUSSION
 Grain damage and weight loss
0
5
10
15
20
25
30
Hm Poly Jute
P. truncatus S. zeamais
%Weightloss
...

MOISTURE CONTENT AND PERCENTAGE
GERMINATION
0
2
4
6
8
10
12
14
16
18
1 2 3 4 5 6
Hm
Jute
Poly
Moisturecontent(%)
Sorage du...

NUMBER OF LIVE INSECTS
0
100
200
300
400
500
600
700
800
900
Hm Poly Jute
P. truncatus S. zeamais
No.ofliveinsects/kggrain...

DAILY TEMPERATURE, DEW POINT AND RELATIVE
HUMIDITY
0
5
10
15
20
25
0 2 4 6 8 10 12 14 16 18 20 22
P. truncatus
S. zeamais
...

CONCLUSION AND RECOMMENDATIONS
 All three maize varieties were susceptible to P. truncatus and S. zeamais.
 It is possib...

CONCLUSION AND RECOMMENDATIONS
CONT’D
 The triple-layer hermetic bag has the potential to control P. truncatus and S.
zea...

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