Search Hydroponics Online:
New Immigration Laws Pave the way for Hydroponic Farming
Powdery and Downy Mildew
Building your own Indoor Grow Room part 2
Building your own Indoor Grow Room part 1
The Benefits of Chelated Micro-nutrients
Is the pH really that important?
Getting Bigger Yields From your Hydroponic Plants
Tips for getting the most out of your nutrients
Millions of dollars lost in hydroponic tomato plant sabotage
Growing Hydroponic Raspberries, part 2
Steelers vs. Browns Final Score: Browns and Steelers
Corey Peters Jersey
Cheap Mike Nugent Jersey
Youth Deion Jones Jersey
the Seahawks suddenly have three . Jersey
The Colts made some decisions we expected and . Jersey
Womens LeGarrette Blount Jersey
Cooper was eventually traded to the Arizona Cardinals . Jersey
There’s already been some clips going around of . Jersey
How are VPS providers beneficial to all the internet users!
www.nflshopoutlet.com
www.authenticsneworleanssaints.com
KANSAS CITY (7-1) at CLEVELAND (2-5-1)
The Cleveland Browns were on the short end of one of the strangest
Breaking Down Every Marcus
Mike Vrabel knows any improvement this year on defense
It’s been just under six months since the Philadelphia
Looking at the encouraging signs from Carson
Houston Texans Sign Greg Mancz
Remember This: Andre Johnson Mic’d Up Against
hydroponicsonline.com

Lesson Nine

Biological Pest Control 9-3

Pest:

Thrips:

Thrips are found in crops all over the world. Crops are
attacked by a number of species of these small winged in-
sects. Larvae and adult insects feed on all above-ground
parts of the plant and, as a result, the tissue dies. Loss of
chlorophyll reduces yield. Serious attacks may result in
desiccation of leaves and damage to flowers and fruits. 
Thrips
can also transmit plant diseases.


Thrip


Due to their small size, the damage thrips do is usually spotted
before the thrips are noticed. Damage appears as small yellow
speckles on the leaves later followed by a silvery sheen on leaf
surfaces. The thrips feed by scraping at tender leaves, with
most damage occurring on new growth. They are only 1/12"
long, but can move very quickly. Adults look similar to a
small worm with wings. Thrips can also carry and transmit
plant disease.


Thrip damage on plant leaf

Biological Control:

Amblyseius cucumeris
and Orius laevigatus
Amblyseius cucumeris
is an effective predator of young thrip larvae. Orius laevigatus, another 
predator, is often applied in conjunction with Amblyseius because they kill adults and larger lar- 
val stages of thrips.


Amblyseius cucumeris 


Onus laevigatus

HOME / LAST PAGE / NEXT PAGE