我场地处广东湛江西北部低丘陵区,以柑桔生产为主。现有柑橙面积4760亩,其中结果树面积2153亩。1982年总产柑橙520多万斤。近二、三年来,连续发现黑蚱蝉为害柑橙枝梢,影响柑橙产量。1983年我场组织专人对黑蚱蝉的生活习性、发生规律,为害情况以及防治方法作了调查。现将调查情况简述如下,以期引起有关单位的注意。 My field is located in the low hilly area of ​​northwestern Zhanjiang, Guangdong, mainly citrus production. The existing citrus area of ​​4760 acres, of which the result area of ​​2153 acres of trees. In 1982, more than 520 kilograms of total orange juice was produced. Nearly two or three years, the continuous discovery of black cicada damage citrus branches, affecting citrus production. In 1983, I organized a field expert to investigate the habits, occurrences, damage, and prevention and control of the black-crested cicada. The survey is now briefly described below, with a view to arousing the attention of the relevant units.