Green decoction to get rid of pest menace
Attack of pests is the biggest menace faced by farmers. Insects tend to attack the plants for inhabiting, breeding, feeding and defending themselves from their enemies. When the plant becomes unsuitable to be their habitat, the insects leave it and search for another plant. This method is the key to choose an appropriate pest control strategy.
Green decoction or ‘Haritha Kashayam’ suggested in Vrikshayurveda (Ayurveda for trees) is an important solution for the pest menace. The plants that have strong odour and pungent flavour which no insect choose to inhabit are the major ingredients in the herbal decoction. Grasses and milky plants that produce sap when stems are broken are not suitable for the green decoction.
Malabar nut (Adalaodakam), black vitex (Karunochi), neem (Aryaveppu), poison nut (Kanjiram), Kiriyath, wild tobacco, raw camphor, lantana (Kongini), papaya, quick stick (Seemakkonna), hill glory bower (Peruvalam), Indian bael tree (Koovalam), oleander (Arali), camphor basil (Karpoora Thulasi) and similar plants that are the major ingredients in the decoction.
- Leaves and tender stems of strong odour plants - 20 kg
- Raw cow dung of indigenous cow - 10 kg
- Sprouted red cow pea - 2 kg
- Black jaggery - 3 kg
- While collecting the leaves and stem, it is ideal to include at least ten varieties of plants.
- A plastic barrel with a capacity of 200 litre is required to prepare the decoction.
- Cut the leaves and stems into small pieces.
- Place the barrel under shade and put some raw cow dung in it.
- Put three fistfuls of cut leaves above the cow dung.
- Put some sprouted peas and jaggery above this layer.
- Repeat the steps until the ingredients are filled in the drum in multiple layers.
- Finally, add 100 litres of water and keep the barrel closed for ten days.
- Stir the decoction ten times every morning.
- After two weeks, filter the green decoction.
- Mix 100 ml decoction in one litre water and pour it down the flowerbed of the plants.
- Mix 50 ml decoction in one litre water and sprinkle it on leaves.
Green decoction is popular for its cost effectiveness. It utilises the weeds in our surroundings and is completely eco-friendly. Some of the self-help groups of farmers have attained great success by using the green decoction to end pest menace in their farms.