Biological pesticides

Biological pesticides


The use of commercial pesticides kills; not only the target insect pests, but also beneficial

insects like spider, grasshoppers and others. Besides this, it leaves residues in the plant

where it is sprayed, and is harmful to the person spraying. If inhaled, pesticide can cause

cancer in the long run.


Pesticides chemically prepared are expensive; we have plants that naturally repel harmful

insect at no cost, such as:


1. Wild pepper – dried and pulverized

– Spray on infected plants. When this becomes moist from dew, insect pests are repelled.


2. Combination of 3 pieces of garlic, 2 pieces pepper, and 2 piece onions grind and pulverize

these, soak overnight in water. By next morning, fill up the water to make 3 gallons. Strain and

spray on affected plants.


3. Ash and lime

– Spread around the plants to keep off snails or land leeches.

– Put a basin of water beside the plant to attract and trap the snails (from PCARRD Farmnews

July 1987)


4. Essence (oil) from oranges, calamansi, pomelo, other citrus

– Dispels and kills ants, flies, white cricket, etc. (PCARRD Farmnews March 1984)


5. Damond Maria (dried) when burned drives away insect pests (PCARRD Farmnews Feb.



6. Eucalyptus leaves


7. Manzanilla flower


Pyrethrum flower Is a kind if white chrysanthemum that grows in high altitudes like the Mountain province. It contains pyrethrin, a chemical that drives insect away. The higher the altitude, the stronger is its pyrethrin content.


The pyrethrin or pesticide content in this flower is not harmful to humans and is beneficial to

plants like potatoes. It also repels insects’ pests that feed on cultured plants.


Pyrethrin comes from chrysanthemum leaves.


From: Greenfields

March 1983, teknotulong

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