Abstract: Making use of a correlation calculation and contrast analysis according to 1984-2005 loxoszege stictialis occurrence development and same period weather data,the weather condition when loxoszege stictialis occurrence were obtained.The results showed that: loxoszege stictialis was found after April,and mainly in May,continuous two ten days in spring when average lowest air temperature was higher than 8℃.After loxoszege stictialis appear,temperature also had some affect on the development of the loxoszege stictialis.When daily mean temperature was lower than 23℃,the higher temperature would benefit the development of pests,when daily mean temperature was higher than 23℃,the higher temperature would refrain the development of loxoszege stictialis.Since mid-July,precipitation would limit the development of loxoszege stictialis,more precipitation would greatly delay the boom of loxoszege stictialis.Evaporation showed some refrains to the development of the sunflower loxoszege stictialis.The forecasting model was build up by using the weather data and observed data of the occurrence and development on the loxoszege stictialis.

Key words: Loxoszege stictialis, Occurrence regulation, Weather condition index sign, Analysis, Estimate