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为明确莱阳地区不同栽培模式下单植梨园、单植桃园、混植桃梨园的梨小食心虫Grapholitha molesta(Busck)发生规律,2009—2012年采用性诱芯法对以上果园梨小食心虫的发生规律进行探究并利用有效积温模型预测其发生代数。结果表明:梨小食心虫在莱阳地区一年可发生4代;第1~3代主要发生在桃园,发生时间为4—8月上旬,第4代主要发生在梨园,发生时间为8月中下旬或9月初,为害一直可持续到10月中旬。梨小食心虫在不同寄主上发生时间不同,除第一代发生比较整齐之外,其他世代发生时间不统一,尤其是梨园。单植梨园和单植桃园的梨小食心虫都能单独完成发育世代,但数量有差异。通过比较其差异显著性,单植桃园1~3代明显多于第4代,单植梨园第4代明显多于第1~3代。
In order to clarify the occurrence regularity of Grapholitha molesta (Busck) with monoculture pears, monoculture peach or peach pear orchard under different cultivation modes in Laiyang region, Explore and utilize the effective accumulated temperature model to predict the occurrence of algebra. The results showed that there were four generations of pest moth in Laiyang in one year. The first to third generation occurred mainly in Taoyuan, the first occurred in April-August, the fourth generation occurred mainly in pear orchard. The occurrence occurred in late August Or early September, the damage sustained until mid-October. Pear boreal worms occur on different hosts at different times, with the exception of the first generation occurs more tidy, the other generations occur time is not uniform, especially pear orchard. Pear boreal mills and Pear Orchard Pear Mung beetles can individually develop their developmental generations, but the numbers vary. By comparing the significance of the differences, the first to third generations of monocotyledonous plants were obviously more than the fourth generation, and the fourth generation of monocarpic pearly plants was obviously more than the first to third generations.