Lesson 8.5 PESTS - Pest management with cover crops
FOOD FOREST COURSE
AGRO-ECONOMY Lesson 8.5
PESTS - Pest management with cover crops
Some cover crops
are used as so-called ‘trap crops’, to attract pests away from the crop of
value and toward what the pest sees as a more favourable habitat. Trap crop areas can be established within
crops, within farms, or within landscapes.
In many cases the trap crop is grown during the same season as the food
crop being produced. The limited area
occupied by these trap crops can be treated by farmers that drive over the trap
crop with a large vacuum-based implement to physically pull the pests off the
plants and out of the field. This system
has been recommended for use to help control the pest lygus bug in organic
strawberry production. Other cover crops
are used to attract natural predators of pests by providing elements of their
habitat. This is a form of biological control known as habitat
augmentation, but achieved with the use of cover crops.
One example of a trap crop in a Permaculture
gardens is by using the crotolaria shrub, planting several of these near citrus
trees. They act as a decoy for the leaf
miner. The grubs adore the crotolaria
and largely leave the citrus leaves alone.
The crotolaria will easily recover again from the infestation.
Weed inhibiting plants
Buckwheat, pine needles, potatoes, oats, pumpkins,
poppies, rye, sunflowers.
Weed Barriere plants
Lemon grass, arrowroot, pigeon pea, comfrey.
Wattles as chop and drop
Sydney golden
wattle, Sally wattle, Black wattle, Acacia longifolia, Acacia floribunda, Acaia decurrens, Acacia melonoxylon, Acacia fimbriata, Black wood, Brisbane golden
wattle.
Text from the roots, Elisabeth Ferkonia (Aus.) PDC
studied with Bill Mollison.
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