[Remote correlations between situation indicators of rice leaf roller during its immigration period in Jiangsu Province and sea surface temperature of west Pacific as well as their long-term prediction models].
The correlations between the situation indicators (peak time of ingoing, last length of peak period, and moth quantity in peak period) of rice leaf roller in Yixing, Yandu and Jingjiang of Jiangsu Province and the grid monthly sea surface temperature (SST) of west Pacific were analyzed by statistical method, and the correlation maps were produced by using GRADS software. The regions in which the SST was significantly correlated with the situation indicators were identified, and the SST at these regions, which was processed by optimization correlation technique, was used as the predictor to set up the long-term models for predicting the situation indicators of rice leaf roller during its immigration period in the three regions. The results showed that the immigration time of rice leaf roller in each of the regions was highly correlated with the SST in that region, and the duration of immigration peak was well correlated with the SST of west Pacific. The correlations between moth amount and SST were significant and stable, and showed some seasonality. Model calibrations indicated that the agreements between outputs from all models and observations were statistically significant (alpha = 0.01), and model validations demonstrated the applicability of the models developed in this study in predicting the situation indicators of rice leaf roller. These models were capable of predicting the possible occurrence situation of rice leaf roller one to two months in advance, being of significance in the prevention and control of rice leaf roller, suitable management of rice production, reduction of pesticide pollution, and protection of environment.
Gao
Ping
P
Jiangsu Meteorological Observatory, Nanjing 210008, China. gaoping5268@126.com
Wu
Jin-Gang
JG
Yang
Rong-Ming
RM
Liu
Mei
M
Huang
Jing-Feng
JF
D025041:Animal Migration / Q000502:physiology*; D000818:Animals; D002681:China; D008962:Models, Theoretical; D009036:Moths / Q000502:physiology*; D012275:Oryza / Q000469:parasitology*; D010140:Pacific Ocean; D012623:Seawater; D012984:Software; D013696:Temperature; D013997:Time Factors