Nymphula depunctalis (Guenée) The caseworm is rarely a significant pest of rice. Signs of this pest in the field are tiny moths and larvae. Attacks by these pests can occur in the nursery to the tillering phase. The destructive pest phase is the larval phase.
The typical damage to the leaves is that the leaves are cut like scissors. The cut leaves turn into tubes that the larvae use to wrap themselves around, and the larvae are secured with silk threads. The larvae breathe from inside the tube and require water in the rice fields. Leaf rolls containing larvae can float on the water surface during the day and feed at night. The larvae will climb the rice stalks carrying their rolled leaves which contain water for respiration. Control measures need to be taken if the attack rate reaches > 25% damaged leaves or 10 damaged leaves per clump. If necessary, use an insecticide with the active ingredient fipronil or carbofuran.
Source: Putra, R. (2018). Hama dan penyakit tanaman padi dan deskripsi padi sawah. Balai Pengkajian Teknologi Pertanian Kepulauan Riau.
Cnaphalocrocis medinalis (Guenée) - leaf folder is rarely a significant pest of rice. The attack becomes significant when the damage to the leaves is at the maximum tillering phase, and the maturation phase reaches >50%. The white color sees the damage caused by the attack of false white pest larvae on the leaves on the plantation. The larvae feed on the green tissue of the leaf from within the leaf folds, leaving the white underside of the leaf.
Mole cricket (Gryllotalpa orientalis Burmeister) is rarely a problem in rice fields but is often found in tidal lands and is usually found only in dry, water-scarce fields. Flooding of plants causes Mole cricket to move to the dam. This pest has large forelimbs. The life cycle is 6 months. This pest can damage plants at all stages of growth. The seeds that are spread in the nursery can also be eaten.
Hydrellia philippina Ferino rice whorl maggot are essential pests in areas where water conditions are difficult to regulate. Rice whorl maggot generally attacks newly transplanted crops in flooded rice fields. In high attack, this pest can cause farmers to replant because Rice Whorl Maggot kills more than 50% of their new plants. Symptoms of aggression in the form of yellow spots along the edges of the leaves, the affected leaves become deformed, and the leaves curl.
