For Benefit For Your Community Gardens and Urban Farms, discover how to build low cost gardens with net houses.
hello and welcome to the second video in
this series on insect pests exclusion
this video describes the process of
making a net house that house designs
can vary greatly depending on target
insect and materials available
there are three recommended ipm
approaches for sustainable farming
systems level one system based practices
like trap crops and level 3 use of by
rational insecticides have been
discussed separately in the training
modules available on Alabama vegetable I
p.m. website video part 1 in this series
provides basic principles of insect
pests exclusion and study results
this video discusses the construction
method for a net house this kind of
protected agriculture is suitable for
small organic or natural farms with
returns on investment within two to
three crop cycles
and that house is a sealed structure
that excludes insect pests throughout
the growing season it is a semi
permanent structure big enough to allow
the use of conventional farm equipment
in Alabama study we found that the net
house can effectively reduce or
eliminate thrips whiteflies stink bugs
lead-footed bugs and many species of
moss using a 50 mesh and sex screen
production and insecticide usage was
nearly ninety five percent resulting in
major cost savings on product and labor
note that farmers can use high tunnels
or other similar structures to bring
down the cost with partial or full
netting there are many benefits of net
house vegetable production system in
terms of crop yield and quality our
findings related to the significant
reduction of insect pests and
insecticide usage are consistent with
past research the following slides will
outline the net house construction
process producers are encouraged to
develop their own design after
considering the target post and
available resources
here's a design for a large net house
that was 150 feet by 46 feet the height
of the structure allowed conventional
farm equipment to be used for planning
and also cut or tear away from the plant
can be the side walls were 14 feet tall
and sufficiently away from the crop rose
that is the plants do not touch the
sidewalls what in polls were used for
building the net house we used wooden
poles for this project since the 50 mesh
screen was a heavy fabric holes were
made in the ground using tractor mounted
equipment as shown what in polls were
partially buried in the ground and soil
around the poles was compacted for
stability
once all the wooden poles are in the
ground a hole was drilled on the top six
inch and steel cables were stretched
over the top as shown in our experience
frequent storms and strong winds can
destabilize and that house so the steel
cables help and sharing weight of the
structure we have also constructed small
net houses and found the addition of
cable support a worthwhile effort to
anger the structure to the ground
steel cables are both sides were
anchored to the ground the large role of
insect netting or fabric can be seen on
the left a high-quality insect net can
last four or more years under ideal
conditions the fabric pieces for stitch
together using a handheld sewing machine
a double stitch with reinforcements was
done for all pieces before putting the
fabric over the cables and wooden poles
a trench digger was used to create a
three foot deep pro parallel to the side
walls on both sides insert netting or
fabric was stretched over the steel
cables and wooden poles some other
designs such as you frames may make it
easier to stretch the fabric and make a
net house once the fabric was laid over
the poles the fabric was tucked into the
ground about three feet in order to make
a tight side wall on both sides tight
sidewall allows pores to remain open and
improve air flow within the net house
that house can be large to allow the
entry of conventional planning equipment
as shown in the
picture and walls and screen doors can
be installed after basic soil
preparation is over vegetable
transplanting can be done after complete
healing of the net house is important to
check transplants for insect infestation
if they are ground outside the net house
limit traffic entering the structure to
prevent accidental past entry through
the double doors
check the entire fabric frequently to
detect any tear and repair immediately
due to high heat condition in the south
and that house will require cooling a
retractable shade cloth can be installed
inside to reflect heat in this case it
was easier to install the shading using
the wooden poles and good quality nylon
cables producers can use fans inside the
structure to improve airflow and reduce
the pockets of humidity that may cause
disease problem net house is not a
silver bullet solution to all pest
problems but it is a useful technology
for sustainable crop production
especially high-value fruits and
vegetables and setting can be integrated
with high tunnels and other structures
in order to provide significant relief
from insect pests
please check video part 34 low-cost
applications of insect net fabric
suitable for small plot intensive
cropping system full results of our net
has study is available in multiple
formats popular articles and bulletins
are available on the Alabama vegetable I
p.m. website a journal article is also
available for those interested please
consult the lead author or commercial
horticulture Regional Extension agent
for further details attend a specialty
crop production meeting for hands-on
training on insects scouting I p.m. and
beneficial insects we think the funding
agencies industry partners in
cooperating producers for supporting the
Alabama vegetable IPM program please
subscribe to the Alabama ipm
communicator newsletter by emailing the
lead author
hello and welcome to the third video in
our series on insect pests exclusion
practices
this video describes the process of
making small net house and low tunnels
for pests reduction watch the earlier
videos in this series to learn about
basic principles and construction of
large net house along with research data
on insect exclusion
there are three recommended ipm
approaches for sustainable systems and
their especially applicable in small
plot agriculture and urban farms level 1
systems based practices like growing
pest tolerant varieties and trap
cropping and level 3 used to buy
rational insecticides have been
discussed separately in other training
modules on Alabama vegetable I p.m.
website
this video discusses insect pests
exclusion methods suitable for community
gardens and urban farms that use small
plot intensive agricultural practices
insect pests exclusion is not a new
concept and it is not the silver bullet
solution to all pest problems many
exclusion practices like the use of row
covers plant collars and fruit bagging
are popular among gardeners the main
ideas to block insects from feeding and
or reproducing on host plants
this video provides more research-based
information about the benefits of small
net houses and low tunnels designs can
vary greatly depending on target insect
and materials available before
developing a strategy we recommend
viewers to first think about past you
want to exclude the length of protection
needed insect exclusion practices have
two basic features design and material
that have to be in balance for best
results design of a pest exclusion
system should be sturdy material should
be low cost for wide-scale use also
think about possible side effects of
using a screen for example using 40 or
50 mesh inset net can exclude small
insect pest but it will also exclude
beneficial insects and pollinators we
control is another limitation due to
raise temperatures in that house
following slides will provide results
from various design and material study
is completed in Alabama net house is a
popular pest exclusion system or
vegetable farmers and many developing
countries however it is still a novel
concept for many producers in the u.s.
Alabama extension has been evaluating
insect pests exclusion system since 2010
and one of the first large-scale studies
pastor
section was highly significant for Los
stink bugs lead-footed bugs trips and
whiteflies 150 mesh white screen was
used that was an expensive project which
sparked interest in designing low-cost
systems for past exclusion and gardens
and small farms this low cost structure
is the mini version of our large net
house disgusting video 1 this low-cost
net house use all locally available
materials and allowed one person to
stand inside it took about two hours to
build an 80 square foot structure after
installing the drip irrigation system
and planting tomatoes we used alien
garden that folded twice over to make
the pore size half inch by half inch is
important to properly anchored plastic
or wooden poles to the ground using
camping hooks the nylon cord connecting
the polls help distribute when pressure
and also supported the fabric above the
canopy we plan a detriment tomato
varieties inside this net house and had
good yields the deal in that house was
moderately effective in reducing off
numbers quantified using sticky
pheromone traps your 2010 was an
outbreak here for armyworms but we
observe production involve numbers with
the net lead-footed bugs could not pass
through the half-inch shipping but Brown
stink bugs could weekly treatment of
pyrethrin purchase from retail store was
used to reduce stinkbug feeding but it
was difficult to apply insecticides
uniformly inside plant canopy it is
important to control weeds around the
structure to prevent buildup of pests
interestingly pollinators and beneficial
insects were seeing landing on the net
and then crawl into the structure and
vice versa to give viewers a better
proof of concept here is a short
description of a study done on two farms
in East Alabama where squash bugs for an
outbreak status in 2011
we tried the simplistic dale & garden
that along with one foot high wall of
white row cover at the bottom of the
structure as pointed out by the red
arrow squash bugs like to crawl on the
ground and hide under leaves so while
wasn't
waited about ten plants were included in
the net house and all squash bugs were
removed in order to measure the
reinvestigation level 10 adjacent plans
were maintained as control the study
shows that squash bugs for able to
reinvest squash inside the net house but
the invasion was delayed by about two
weeks plans in the net house produce
fruits for two extra weeks
whereas the crop outside to come to the
past the reinvestigation levels at four
weeks was still half the level compared
to the unprotected crop those test
locations gave similar results reduction
in adult squash bug numbers also mean
reduced number of eggs per plant over
three weeks
early-season insect protection is often
critical in the southeast or plant
establishment is a problem here is
another low frame that house that was
used to evaluate super light insect
barrier commonly available on many
gardening websites early-season pest
management and tomatoes
this fabric is available in 8 foot x 20
x 48 or nice 6-foot pieces from the
manufacturer and is very convenient to
handle it allows ninety percent light
penetration this fabric can be used in a
variety of ways including you frames or
low tunnels
this graph shows the effectiveness of
the super light insect barrier compared
to many commercial & garden insecticides
the fabric was able to reduce about
60-percent early-season flea beetle and
aphid infestations without the need of
any insecticide this level of insight
protection was similar to more expensive
insecticide ulm aterial we tested this
positive effect was observed for over
three week period and the fabric was
removed
thereafter once the tomatoes were
well-established due to warn
microclimate inside the fabric it is
important to keep weeds under check here
are some variations to a low-cost
nuthouse this project is being carried
out in collaboration with the Bay Area
Food Bank of Mobile Alabama both these
designs are very suitable for community
gardens that have raised bed production
system fact sheet containing details of
the construction process is available on
the IPM website
here's a video that shows quick and
Sekhmet installation system for raised
beds using half inch PVC pipes
participate can be seen laying down
pieces of super light fabric on both
sides of the bed and tucking it under
the PVC brain
this can be done with steel mesh also
the pieces of fabric were joined
together at the top with minimum overlap
to avoid shading the entire structure is
bolted to the wooden base boards fabric
at the end walls was way down to close
the unit it is best to lay out the drip
irrigation
shin and transplanting done before
putting the fabric on with the extra
heat trapped inside read control is a
constant battle
according to our observations a single
layer of fabric does not cut out too
much sunlight or trap too much heat once
the fabric is taken off tomatoes will
rapidly grow and fruit for producing
insect pollinated crops producers can
release bumblebees inside long net
houses or simply roll up the sides
during day time for forging bees closing
the net house at night can reduce
majority of the night flying moss from
reaching the crop met houses open up
many avenues for integrating other
sustainable agriculture practices if you
are using shade cloth as a net in a low
tunnel or high tunnel then it may be
possible to release commercially
available predatory insects like lady
beetles and lace wings inside the net to
reduce caterpillars aphids trips and
whiteflies contact of Regional Extension
agent to learn more about beneficial
insects or attend a vegetable ipm
training meeting near you that house
it's not the silver bullet solution to
all insect problems careful choice of
material and design are important
factors to successful management of
target pest please consult Alabama
vegetable I p.m. website for further
reading about insect exclusion practices
we think the funding agencies industry
partners in cooperating producers for
supporting the Alabama vegetable IPM
program please subscribe to the Alabama
ipm communicator newsletter by visiting
the vegetable I p.m. website
hello and welcome to the first video in
a series on insect pests exclusion
this video will provide viewers with an
introduction to insect pests exclusion
and discuss the effectiveness of net
house for vegetable production results
discussed herein are from on Form
studies completed an Alabama there are
three recommended ipm approaches for
sustainable farming systems level 1
systems based practices like trap crops
and level 3 use of bio rational
insecticides have been discussed
separately in the training modules on
Alabama vegetable I p.m. website
this video discusses the level 2i p.m.
practices related to insect pests
exclusion practices insect pests
exclusion is not a new concept many
exclusion practices like the use of row
covers reflective mulches implant colors
are popular among small producers the
main idea is to block insects from
feeding and or reproducing on host
plants exclusion can be time and grow
stage-specific or exclusion can be done
throughout the life of the crop as
discussed and further slides special
attention must be given to target insect
pests and exclusion material for
developing a cost-effective production
system
a net house is a sealed structure that
excludes insect pests throughout the
growing season it is a semi permanent
structure big enough to allow the use of
conventional farm equipment please see
video part to that has step-by-step
instructions on building a net house net
houses are widely used in Africa Asia
and South America and sustainable crop
production method crops with high
returns have been successfully grown in
developing countries where local food
systems are dominated by small producer
or limited resource farmers majority of
these studies have involved producers as
technology valuators reported
significant reduction and insect pests
insecticide usage a USAID a project in
Kenya called the bionet a group project
has a video worth watching for their
simplistic approach to insect exclusion
low-cost net houses can be very useful
for southeastern vegetable producers a
small net house using readily available
materials can be used for raising insect
free transplants the cost could be much
less than a standard greenhouse the
slides that follow will describe results
from a large nuthouse study this net
house was evaluated in Alabama with
tomatoes and bell peppers 50 mesh
netting was used to exclude trips and
white flies that transmitted diseases
transplants for grown outside in a high
tunnel and then planted in the net house
a double door was installed to stop
insects from getting in a step-by-step
net house construction method is
available in video part to you
here is a look of the crops inside the
net house tomatoes and bell peppers were
planted using conventional equipment
after complete construction traffic
inside the net house was limited to
prevent accidental pest introduction a
40-percent retractable shade cloth was
installed to lower the temperature
producers are strongly encouraged to
sticky wing trap to monitor insect pests
and open field or inside protected
structures there was a significant
reduction in mauve numbers inside net
houses as shown by the pictures on the
right compared to the open field traps
on left reduce moth numbers mean lower
caterpillar pressure inside that house
and improve crop production
due to a 50 mesh screen the large net
house eliminate most of the major moss
such as hornworms armyworms bloopers and
fruit worms
we had an accidental aphid infestation
on bell peppers do too invested
transplants and lack of natural enemies
there were no outbreaks of thrips
whiteflies stink bugs and leaf litter
bugs and the net house compared to the
open field crop which was treated weekly
with insecticides to produce a
profitable crop clearly there are many
benefits of net house vegetable
production system in terms of crop yield
and quality producers should grow
disease and heat tolerant vegetable
varieties to maximize yield our findings
related to a significant reduction of
insect pests and insecticide usage are
consistent with past research this kind
of protected agriculture has more chance
of becoming certified organic or
certified natural with returns on
investment within two to three crop
cycles
insect pests can adapt to the smartest
technologies armyworm Oscar found laying
eggs on the storm damage fabric
resulting caterpillars entering the
structure to feed on props the
caterpillar pressure was far less than
open field and did not reach an outbreak
status caterpillars were manually
removed and make mountains near the door
and those can be treated with
insecticide Bates accidental pest
introductions may be managed using soft
insecticides and or beneficial insects
inside the net house
contact the lead author or Regional
Extension agent to find out more about
beneficial insect
growers must plan for managing humidity
inside the structure if a fine screen is
used growers should select largest pore
size adequate for their pest management
needs installing fans between rows can
be an option and smaller structures he
can also be managed using shade cloth to
reflect radiations as indicated earlier
protected agriculture with net house or
modified high tunnels can improve the
effectiveness of software insecticides
and or beneficial insects available
commercially
results of this study are available in
multiple formats popular articles and
bulletins are available on the Alabama
vegetable I p.m. website in this video
series part 2 will provide details for
constructing in that house in part 3
will provide information about insect
netting integrated with high tunnels
consult the authors or commercial
horticulture Regional Extension agent
for designing a low-cost net house
attend any specialty crop production
meetings statewide for additional
hands-on training on insect scouting and
control practices
we think the funding agencies and
industry partners for supporting the
Alabama vegetable IPM program
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