Morphological characteristics of Rice Root and Leaf Beetle and its Control techniques

Rice root leaf beetle, also known as rice root golden flower worm, belongs to Coleoptera, Chrysomelidae. The adult is about 6 mm long, with greenish brown and metallic luster on the back and antennae, and dense silver hairs on the ventral side. The lower part of each leg segment was enlarged, and there was a dentate thorn at the proximal end of the posterior leg segment. There are several parallel longitudinal grooves composed of engraving points on the sheath wing. The eggs are laid in blocks and covered with a white transparent gel. The egg is long oval, slightly flattened, about 0.8 mm long, colostrum white, and then becomes yellowish. The larvae are about 9 mm long, spindle-shaped, white slightly curved, three pairs of chest feet are very small, and there is a pair of brown claw-shaped tail hooks (respiratory hooks) at the end of the abdomen. The naked pupa is about 7 mm long, initially yellow-white, then brown, and the pupa is hidden in a reddish-brown cocoon.

Integrated prevention and control:

The main results are as follows: (1) draining the field water in winter can dry and crack the soil surface and kill the overwintering larvae.

(2) thoroughly remove weeds such as Rabdosia angustifolia in the field and eliminate the intermediate host.