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Gabriele Stoll
Natural Crop Protection in the Tropics
Letting Information Come to Life
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Methods of Field Protection
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Insects
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Insect-controlling plants
Overview:
Mixed preparations using plants with
insect-controlling properties
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Artemisia
Stinging nettle
Eupatorium
Cow urine
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Artemisia vulgaris (whole plant)
Urtica dioíca (whole plant)
Eupatorium odoratum (whole plant)
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Target organisms
Preparation & application
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General plant strengthener in tea
cultivation after conversion to organic
20 kg each of Artemisia and stinging nettle and 10 kg of Eupatorium are
chopped and soaked in 200 litres of water for two weeks. Cow
urine is stored and fermented separately in a plastic
container. The resultant liquids are then strained and mixed.
For field application the stock solution is diluted at a rate
of 1:10 and sprayed every two weeks.
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Artemisia
Citronella grass
Stinging nettle
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Artemisia vulgaris (whole plant)
Cymbopogon nardus (whole plant)
Urtica dioíca (whole plant)
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Target organisms
Preparation & application
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Helopeltis theivora, Holotrichia spp. in tea cultivation
The plant material is mixed with the water
at a rate of 1:4 and soaked for 2–7 days. The strength of
the extract despends on the severity of attack.
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Chilli
Lemongrass
Bitterwood
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Capsicum annum (fruit)
Cymbopogon citratus (whole plant)
Quassia indica (leaves)
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Target organisms
Preparation & application
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Rice pests
Pound each plant finely and collect the
plant juice. Mix 5–7 tablespoons of plant juice from each
plant and mix with 4 litres of water. Add soap as sticker and
apply; about 90% control effect.
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Tinospora
Madreado
Chilli
Tobacco
Citronella grass
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Tinospora crispa (vine)
Gliricidia sepium (leaves)
Capsicum frutescens (fruit)
Nicotiana tabacum (leaves)
Cymbopogon nardus (whole plant)
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Target organisms
Preparation & application
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Broad spectrum
Use 5 kg Tinospora, 25 kg fresh Gliricidia leaves,
1 kg of chillies, 10 kg tobacco leaves and 25 kg citronella
grass. Chop these plant materials, put them in a drum full of
water and allow to ferment for about one month. For field
application, dilute one litre of this stock solution with
10–12 litres of water and add soap as sticker.
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The printed version contains more
information about mixed preparations.
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