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Pest monitoring and scouting in potato

Pest monitoring and scouting in potato. End. Next. Pest management actions are based on data collected through pest monitoring, which involves survey/field scouting, pest monitoring though traps and decision making. Survey/Field Scouting. Pest management action.

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Pest monitoring and scouting in potato

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  1. Pest monitoring and scouting in potato End Next

  2. Pest management actions are based on data collected through pest monitoring, which involves survey/field scouting, pest monitoring though traps and decision making Survey/Field Scouting Pest management action Pest monitoring through traps Decision making End Previous Next

  3. 1. Survey/Field Scouting • Regular surveys/field scouting should be carried out by farmers/extension functionaries to keep a close watch on the appearance of insect pests, diseases and biocontrol fauna, once in seven days • Records should be kept about incidence of insect pests, diseases and presence of biocontrol agents in potato field to assess whether the pest population has reached the Economic Threshold Level (ETL) End Previous Next

  4. ETLs for some important pests and diseases Pest/Disease ETL 1. Aphids 20 aphids/100 leaves 2. Potato tuber moth 15-20 moth/trap consecutively for 3 nights 3. Golden nematode 1-2 larvae/gram of soil 4. Late blight Not more than 1 % leaf area 5. Bacterial blight 1 % of plant population 6.Potato viruses 1 % of plant population 7. Soil & tuber borne disease 5 % potato tubers 8. Rodents Working index is 25 live burrows/ha End Previous Next

  5. 2.Pest population/damage assessment • For sucking pests, population should be counted on three leaves (top, middle and lower) per plant • Aphid population should be recorded on 34 plants • Cutworms and white grub per cent damage assessment can be made by counting total number of plants and affected leaves End Previous Next

  6. 2.Pest Monitoring through Pheromones/Yellow Pan/Sticky Traps/Light Traps End Previous Next

  7. Pheromone traps: Pheromone traps may be placed in the field @ 20 traps per hectare for potato tuber moth for mass trapping in the field and @ 4 traps per 100 m3 area of the store Fig. Pheromone trap Source: www.ipm.iastate.edu End Previous Next

  8. Yellow pan/Sticky traps Set up yellow pan/ sticky traps for monitoring aphids @ 10 yellow pans/sticky traps per ha. Locally available empty yellow coloured tins coated with grease on outer surface may also be used End Previous Next

  9. Light traps Set up a light trap during pre-monsoon season to monitor the activity of adult scarab beetles. Light traps can also be installed to monitor the activity of cut worm moths at least one month before the sowing of potato crop Fig. Light trap Source: www. oisat.org End Previous Next

  10. 3. Strategy for Decision Making: • Strategy has to be evolved based on the weekly data on pest/disease and defenders (biocontrol fauna) • Judicious decision for management practices are to be taken accordingly considering the ETL and pest: defender ratio End Previous

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