此病为线虫潜存稻种中,随稻种传播而引起的。一般播种后线虫即随幼芽至茎叶到叶部,而在叶尖显出病征。在水稻分蘖盛期至孕穗前最为明显。该虫侵食幼嫩细胞、破坏组织,影响生长发育,致使植株矮小,抽穗困难。严重的减产20％左右。一般在粳稻、糯稻上均易发生。由于该虫潜存于稻种中,虽经日晒或 The disease is nematode latent rice species, with the spread of rice caused. After the general sowing that is, with young shoots to the leaves and stems and leaves, and showed signs of disease in the tip. In the tillering stage of rice to the ear before the most obvious. The worm infects young cells, destroy tissue, affecting growth and development, resulting in short plants, heading difficulties. Serious cut 20% or so. Generally in japonica rice, glutinous rice are prone to occur. As the insects hidden in the rice species, though by the sun or