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Study on the Seasonal Occurrence of Major Rice Insect Pests on Recommended Rice Varieties |
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| รหัสดีโอไอ | |
| Creator | Suwat Ruay-aree |
| Title | Study on the Seasonal Occurrence of Major Rice Insect Pests on Recommended Rice Varieties |
| Publisher | Department of Agriculture |
| Publication Year | 2537 |
| Journal Title | Thai Agricultural Research Journal |
| Journal Vol. | 12 |
| Journal No. | 1 |
| Page no. | 4-16 |
| Keyword | rice, occurrence of insect pests, recommended varieties |
| URL Website | https://at.doa.go.th/journal |
| Website title | Thai Agricultural Research Journal |
| ISSN | 0125-8389 |
| Abstract | Recommended rice varieties RD7, RD11, RD21, RD23, RD25, SP60 and SP90 were cultivated in the fields in order to study the seasonal occurrence of insect pests. The experiment was conducted in the farmer's field in Tumbol Lam Luk Ka, Amphoe Lam Luk Ka, Pathum Thani province both in the wet and dry seasons of the years 1990 - 1990. None of insecticide were applied in the plots. The population of insect pests was weekly investigated by direct counting, using d-vac sucking machine, and sweep net. The result showed that rice leaf folder, Cnaphalocrocis medinalis Guenee, rice leafhoppers and planthoppers were pests of rice in dry season. Their population was found abundant during the tillering to booting stage of rice growth. The RD23 variety was the most damaged by the rice leaffolder. In wet season, the rice insect pests were rice leafhoppers and planthoppers. They were found abundant on rice plant during tillering to booting stage. In milky stage rice bug, Leptocorisa spp. was found infested rice grain especially on variety SP60. In wet season of 1990, population density of brown planthopper (BPH), Nilaparvata lugens (Stal) was found higher than the economic threshold (> 10 BPH/hill) on teh varieties RD7, RD25 and SP60. |
