Sampling method for estimating stem borer infestation in sugar cane fields
| MSI99P0188 | |
| Lim Shin Chong, L. C. Y. Rajabalee, A. | |
| Sampling method for estimating stem borer infestation in sugar cane fields | |
| Periodical article | |
| 1988 | |
| Sug. Cane | |
| (Autumn Supplement): 15-17 | |
| En | |
| An estimate of per cent joints bored in a field can be obtained by two methods. In both cases stratified random sampling should be used. A stratum should have an area not exceeding ¼ ha. In the first method - sampling for per cent joints bored - two samples of 20 stalks each should be taken from each stratum. The second method is the calibration method whereby per cent joints bored is derived from a knowledge of per cent stalks bored. It relies on the fact that the regression coefficient b is known for a given variety and environment. Six samples of 20 stalks each should be taken from each stratum and the overall per cent stalks bored (x) detrmined. Then the percent joints bored (y) is determined by applying the regression equation y = 100 [ 1 - (1 - x/100) b]. | |
| SUGARCANE CHILO SACCHARIPHAGUS SAMPLING TECHNIQUES PESTS INSECT PESTS | |
| MAURITIUS | |
| Sugarcane: Pests, pest control and management | |
| Insect pests: Stem borer: Chilo sacchariphagus | |
| 633.61(42) | |
| 1992-02-13 | |
| En | |
| Mauritius Sugar Industry Research Institute | |
| LIB | |
| CAT | |
| 1 | |
| ENTO Biom |