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
why?
I want to ask a question
I want to ask a question
help me
how to?
Please help me!
Conversion from Grams per Meter Square to Grams per Liter
help me
I have a question
Will this design work?
How to grow tomatoes?
how i can grow up my vegetable growth up faster?
Help with troubleshooting my outdoor Ebb and Flow
When should I move my plants to a hydro system? Farm Kit ?
uying a Smart-valve?
bland tasting vegetables
A quick question about Hydroponics
problem
A little question about cycle timer
alittle question
hydroponicsonline.com

Lesson Nine

Biological Pest Control 9-6

Pest:

Leaf Miners

Leaf Miners are a major problem for many crops. The larvae form
tunnels in the leaves of the plant. This may lead to desiccation and
early leaf loss. The loss of chlorophyll may result in severe reduc-
tions in yields.


Damage by Leaf Miners


Leaf Miner

Leaf Miner adults are small black and yellow flies. Leaf Miners eggs are inserted in leaves
and larvae feed between leaf surfaces, creat-
ing a meandering track or "mine." At high
population levels, entire leaves may be cov-
ered with these tracks. Mature larvae leave
the tracks, dropping to the ground to pupate.
This life cycle takes only 2 weeks in warm
weather.

 Biological Control

Dacnusa sibirica and Diglyphus isaea

These parasitic wasps lay their eggs in or near leaf miner larvae. The young parasite larvae
hatch from these eggs and begin to feed on their host, internally if Dacnusa and externally 
if Diglyphus. Eventually a new parasite adult emerges to continue the work of its predecessors.


Dacnusa sibirica


Diglyphus isaea

HOME / LAST PAGE / NEXT PAGE