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从1974/75蔗季到1983/84蔗季,每月从300米~2的观察小区中采集秋植蔗枯心苗,根据受害程度或症状进行分类,从而得出各种蔗螟及其他媒介与枯心苗发生的相关性。蔗黄螟(Argyroploce Schistacena)枯心苗在秋植蔗的幼苗期很少发生,但到翌年3月份逐渐达到高峰。蔗二点螟(Chilotraea infuscatella)引起的枯心苗主要发生在幼苗期,并在当年的10～11月份达到最高峰。蔗茎螟(Proceras Venosatus)引起的枯心苗在苗期极少,但到成熟期剧增。蔗白螟(Tryporyzanivella)引起的枯心苗,其第一次高峰出现在当年12月份,第二高峰在翌年5月份,但极少发生于其它时间。大螟(Sesamia inferens)引起的枯心苗从一开始就迅速增加,在当年12月份达到最高峰。本研究发现了大量不明原因的枯心苗,并讨论了其发生和变动情况。此外,还叙述了由机械损伤、甲虫、美洲粘虫(Cirphis Loreyi)、老鼠及风害等媒介引起的枯心苗。在不同的年份蔗螟卵的数量与枯心苗之间的相关性并不总是显著的。
From 1974/75 sugarcane season to 1983/84 sugarcane season, the autumn plantlets of autumn sugarcane were collected from the observed plots of 300-2 in each month, and classified according to the degree of victimization or symptom, so as to obtain various kinds of sugarcane borers and other media Correlation with dead heart seedlings. Cane firerock (Argyroploce Schistacena) seedlings in the autumn seedling seldom occurs, but gradually reached the peak in March the following year. The dry seedlings caused by Chilotraea infuscatella mainly occurred in seedling stage and peaked in October and November of the same year. Cane stem borer (Proceras Venosatus) caused by very few seedling seedlings, but the surge in maturity. Cunninghamia lanceolata (Tryporyzanivella) caused by dry seedlings, the first peak appeared in December of that year, the second peak in May the following year, but rarely occurred at other times. The dead seedlings caused by Sesamia inferens increased rapidly from the very beginning and reached a peak in December of that year. This study found a large number of unknown heart disease seedlings, and discussed its occurrence and changes. In addition, dead-hearted seedlings caused by mechanical damage, beetles, Cirphis Loreyi, rats and wind-related vectors are also described. The correlation between the number of sugarcane borers and the seedlings of calluses in different years is not always significant.