Insect Pests of Fruits, Plantation, Medicinal & Aromatic Crops

Assessment of insect population and damages in horticultural crops

Need

1. To know the extent of pest load and their damage.
2. To workout economic injury level (EIL) and economic threshold level (ETL). C) To estimate yield loss. d) To decide the timing of control measures in order to avoid indiscrimate use of insecticide.
• EIL: Cost of control measures = Loss by insect
• ETL: Level at which, control measures to be taken to avoid the insect population / damage reaching EIL.
1. Mango

• Select five trees (one at the center and four from the corners of the field) and assess the pest population / damage as follows.

2. Citrus:

• Select five trees (one at the centre and four from the corners of the field) and assess the pest population/damage as follows.

3. Pomegranate

• Select five trees (one at the centre and four from the corners of the field) and assess the pest damage as follows.

4. Brinjal

• Select 50 plants at random from one acre leaving the borders, and record the observations on pest population and/or damage at weekly interval starting from 7 days after planting (DAT) up to last picking of the fruits.

5. Bhendi

• Select 50 plants at random from one acre leaving the borders, and record the abservations on pest population and / or damage at weekly interval starting from 7 days after planting (DAT) up to last picking of the fruits.

6.Tomato

• Select 50 plants at random from one acre leaving the borders, and record the observations on pest population and/or damage at weekly interval starting from 7 days after planting (DAT) up to last picking of the fruits.

7. Rose

• Select 10 plants at random and assess the pest population/damage as follows.

8. Jasmine

• Select five plants (one at the centre and four from the corners of the field) and assess the pest population/damage on follows.