Question

How are seeds protected from insects in olden days

Answer 1

Sprinkling kunapa (liquid manure prepared from parts of carcasses) on trees suffering from imbalance of vata.
Fumigation (smoking) by burning animal fat, ghee, hemp, horse hair and cow’s horn, also for vata.
Sprinkling a decoction made out of panchamula (roots of Clerodendrum phlomidis, Aegle marmelos, Stereospermum suaveolens, Gmelina arborea and Oroxylum indicum) for Kapha type of disorders.
Drenching tree base by decoction of milk, honey, licorice and Madhuca indica J.F. Gmel. for pitta type of disorders.
Drenching tree base with decoction of triphala (dried fruits of Terminalia chebula), ghee and honey; also for pitta type of disorders.
Dressing tree wounds with a paste made from the barks of banyan and cluster fig trees, cow dung, honey, mustard, and ghee.
Applying paste of vidanga (Embelia ribes) and thick mud.

Answer 2

There are various ways by which the early people has saved the plant from being destroyed by insects. Some of the process I'm stating below: Sprinkling a liquid called the kunapa which is basically a liquid manure which is prepared from parts of carcasses, is sprayed on trees which is  suffering from imbalance of vata in them. The second way was fumigation by burning animal ghee, animal fat, jute, horse hair and cow’s horn. It is also used for vata. Sprinkling a decoction which is made out of panchamula which is used for Kapha type of disorders.