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Crickets and their feeding damage (IRRI)Crickets or gryllid
Euscyrtus concinnus (de Haan)
Symptoms
Irregular to longitudinal exit holes Cutting of central portions
of the leaf blades leaving only the midrib DeadheartCrickets are
defoliators. They can be numerous at times and can totally infest
the crop, especially the young
rice panicles.
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Adult moth (IRRI) Cutworm larva (IRRI)
Common cutworm
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Spodoptera litura (Fabricius)
Symptoms
Seedlings cut at bases
Leaf surfaces skeletonized Entire plants devoured
The cutworm is polyphagous and may become serious during the
seedling stage, especially in upland rice.
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Larva creating notches (IRRI)
Green semilooper
Naranga aenescens (Moore)
Symptoms
Leaves scraped exposing the lower epidermis Leaf edges
damaged
Larval scrapings (IRRI)
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Larva of greenhormed caterpillar (IRRI)
Greenhorned caterpillar
Melanitis leda ismene Cramer, Mycalesis sp.
Symptoms
Leaf margins and leaf tips devoured Leaf tissues and veins
removed
The greenhorned caterpillars are minor pests of rice. Their
potential severity is generally too low to
cause yield loss. Natural enemies usually control their
populations and rice compensate from the
feeding damage of greenhorned caterpillars.
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Rice mealybug
Brevennia rehi(Lindinger)
The rice mealybug causes heavy losses to crops in Bangladesh,
India, and Thailand. High density (> 100
mealybugs/hill) caused plants to wilt and die.
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Mole cricket
Gryllotalpa orientalis Burmeister
Mole crickets are polyphagous. They feed on the underground
parts of almost all-upland crops. They
occasionally become sufficiently abundant to cause heavy damage
to roots and basal parts of rice plantsgrowing in raised nursery
beds or upland conditions. In wetland rice, infestation occurs when
there is no
standing water.
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Rice whorl maggot
Hydrellia philippina Ferino
