Trichogramma are primary parasitoids eggs of Lepidoptera, but parasitism also occurs in eggs of other orders such as Coleoptera, Diptera, Hemiptera, Hymenoptera and Neuroptera. It is important for plant protection because of its wide spread natural occurrence and its success as biological control agent by mass releasing. Since this parasitoid kills the pest in the egg stage itself before the pest could cause any damage to the crop and also that it is quite amenable to mass production in the laboratories, it has the distinction of being the highest produced and most utilized biological control agent in the world
This is an egg parasite which survives by eating eggs of approximately 200 species of harmful insects of Lepidoptera family. The length of this insect is 0.4 to 0.7mm and its life cycle is as follows
|Period of laying eggs||16 to 24 hours||Larva duration|
|2 Day||Pupa period||2-3 Days|
|Total time period||8-10 Days (summer)||9-12 days (winter)|
- Female Trichogramma lays her eggs amongst. eggs of harmful insects.
- The eggs grow there and complete their life cycle.
- The insect hatches the eggs and comes out.
- Trichogramma is supplemented in the form of cards.
- One card contains approximately 20,000 eggs.
- Trichogramma is used to destroy shoot borer, fruit borer and leaf folder insects of paddy, maize, sugarcane, sunflower, cotton, pluses, fruits and vegetables.
- It can prevent 80 to 90% loss.
Before its use in the field, keep Trichocard at 5 to 10 degree centigrade in ice box or refrigerator.
- Thrichocard is applied in different crops 3-4 times at an interval of 10-15 days.
- As soon as the eggs of Harmful insects appear in the field tie the small pieces of card immediately in different parts of the field on lower surfaces of leaves or at the joints of leaf and stem.
- Use 5 cards per hectare in normal crop and 10 cards per hectare in big crops such as sugarcane.
- Apply it in the evening in the field but do not spray chemical pesticides before during and after its use.