Plantwise Factsheets for Farmers
Management of chilli thrips using sprinkler irrigation
Recognize the problem
acknowledged to be the most destructive pest in chilli cultivation. Although
farmers may spray various chemicals to control the thrips, they often do not
achieve a good result. Applying chemicals increases the cost of cultivation and
may lead to environmental harm.
Chilli is an
important crop grown in Sri Lanka. It is cultivated extensively in the dry
zone. However the chilli cultivation may be affected up to 100% by Leaf curl
complex. Thrips are presently considered as the most important causal agent of chilli
leaf curl complex.
of chemical pesticides to manage chilli thrips leads to the development of
resistance and is harmful to human health. Thus, there is a need to control
thrips through alternative measures which are eco-friendly.
One solution to reduce thrips incidence in chilli is by
using a sprinkler system.
Studies reveal that using sprinkler irrigation
resulted in a water saving of 33% compared with the traditional irrigation method.
There was also a yield increase of 24% in chilli. In addition, a micro-climate which is more conducive
to the chilli plants and less favorable to the thrips leads to a reduction of
the pest population.
land preparation, install the sprinkler system in the field and, during the
installation, consider even water spraying across the entire field
planting a live wind barrier in windy areas (e.g. Gliricidia, manioc, wing
bean, maize, sorghum)
on the sprinkler on a daily basis in the morning from 6am to 7am and in the
afternoon from 1pm to 2pm
of irrigation should be 30 minutes in both occasions
duration of irrigation depends on soil type and weather conditions
the proper water pressure
The recommendations in this factsheet are relevant to:
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