Plantwise Factsheets for Farmers
Management of Rice Hispa
Recognize the problem
Rice hispa is a very serious insect pest of rice,
particularly in the Terai region of Nepal. The adult is a small bluish black beetle,
measuring 5 mm in length and is recognized by numerous short spines on the body
and forewings. Adults scrape the areas between the veins giving a
characteristic appearance of white parallel streaks along the leaf.
Eggs are found inside the leaf tissue towards the tip
of the leaf. On hatching, the young grubs feed between the upper
and lower layers of the leaf, tunnelling downwards. The grubs are legless,
creamy white and are not easily seen because they are concealed inside the leaf
tissues. They are flattened and pale yellow in colour. They pupate inside the
leaf mines that they create.
During severe attack, the leaves become white and then
The larvae can be detected by holding the damaged leaf up to the light
or by passing your fingers along the tunnel.
The damage starts in nurseries and spreads to the rice fields.
Practise closer spacing while
transplanting the rice. Higher numbers of leaves per unit area in closer
spacing creates a suitable environment to tolerate infestation of rice hispa
- Collect and destroy floating beetles
after flooding in the rice nursery beds
- Remove grasses in and around paddy
fields or in fallow fields to prevent population build-up of rice hispa in the
- Adopt proper spacing, irrigation and
fertilizer application practices. Avoid application of high nitrogen containing
- Clip infested leaf tips along with
eggs and grubs before transplanting. Leaf clipping controls 75-90% of grubs.
- Collect adult beetles using a sweeping
net in the morning hours
- Spray neem based pesticide e.g.
altineem @ 3ml per litre of water or crude neem seed oil. Application of growth
regulators like methoprene and diflubenzuron produces deformity on larvae and
- If application of chemical
insecticides is required, spray malathion 50% EC @ 2ml per litre water when 1
adult or 1-2 damaged leaves per hill are seen
When using a pesticide, always wear protective clothing and follow the instructions on the product label, such as dosage, timing of application, and pre-harvest interval.
The recommendations in this factsheet are relevant to:
Pakistan, Bangladesh, Sri Lanka, Bhutan, India, Nepal
Plantwise Factsheets Library app
Get all of the factsheets and pest management decision guides from this website in an offline format via the Plantwise Factsheets Library app.