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核桃举肢蛾(Atrijuglans hetaohei Yang.)以幼虫蛀食核桃青皮,受害果逐渐变黑干缩,故又称“核桃黑”,是河北、河南、山西、山东、陕西、四川、贵州诸省核桃产区内发生普遍、为害严重的一种害虫。在陕西省内分布于商县、山阳、商南、洛南、镇安、柞水、丹凤、扶风、陇县、临潼、黄陵、蓝田、长安、铜川等县市,而以商洛地区受害最重。严重发生年份,产量损失40%左右,出仁率降低30%左右,含油量降低35%左右。洛南县石门公社红日大队在1974年有核桃结果树1,500株,而受害树达1,400株,受害株率达95%,黑果率为42%;该县四皓公社株受害率为24.9%,黑果率为29.5%。柞水县银碗公社株受害率达95%,黑果率达70%。足以看出该虫为害的严重性。
Walnut pest moth (Atrijuglans hetaohei Yang.) Walnut green peel eroded pests, the victim gradually blackening shrinkage, it is also known as “walnut black”, Hebei, Henan, Shanxi, Shandong, Shaanxi, Sichuan, Guizhou Province walnut Common occurrence in the producing area, a serious damage pests. In Shangxi Province, it is distributed in counties, Shangyang, Shangnan, Luonan, Zhen’an, Zhashui, Danfeng, Fufeng, Longxian, Lintong, Huangling, Lantian, Chang’an and Tongchuan. Most affected. Serious years occurred, the yield loss of about 40%, the kernel rate reduced about 30%, 35% lower oil content. Shilan County Shimen commune red brigade in 1974 there are 1,500 walnut fruit tree, and the victim tree reached 1,400, the victim strain rate of 95%, black fruit rate was 42%; the county Sihao commune strain was 24.9% , Black fruit rate was 29.5%. Zhashui County Silver Bowl Gongshu strain hit rate of 95%, black fruit rate of 70%. Enough to see the severity of the pest damage.