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1988～1989年,我们在本所2～3年生温州蜜柑园和20年生新会橙园开展了象鼻虫发生规律调查及防治试验,现将结果简报如下。一、为害情况为害柑桔的象虫主要有大灰象虫、大绿象虫和小绿象虫,其中以前两种为害最严重。每年清明前后,成虫大量食害春梢嫩叶,稍后又转移为害幼果及夏梢。被害叶片残缺不全,幼果受害后果面出现凹入缺刻,引起落果,严重时可将幼果食光仅留果蒂。为害轻的果实尚能发育生长,但成熟后果面出现伤疤,果实品质亦降低。
From 1988 to 1989, we investigated the regularity of occurrence and control of weevils in Wenzhou Citrus Orchard and the 20-year-old New Orleans Orange Garden, two to three years old. The results are summarized as follows. First, the damage to the situation Citrus elephant insects are large gray elephant insects, large green elephant insects and small green elephant insects, of which the former two were the most serious damage. Before and after the Ching Ming annual, adults eat a lot of spring leaves young leaves, and later transferred to harm the young fruit and summer shoots. Victims of incomplete leaves, fruit consequences of young fruits appear concave indentation, causing fruit drop, serious when the young fruit can only leave the fruit light. Damage to light fruit can still grow, but after ripening scars, fruit quality is also reduced.