金针虫俗称叩头虫,是为害小麦、棉花、烟苗、玉米、高粱、马铃薯、甘薯、甜菜等旱作物的地下害虫,尤以沙壤土和粉沙壤土发生较多。早春当10厘米土温达5.7—6.7℃时开始活动,4月上旬土温升至10.8—16.6℃时活动最盛。金针虫以幼虫取食刚发芽的种子和咬断幼苗茎基部,幼苗长大后,便钻入茎内取食,茎基往往被蛀食一空,被害幼苗最后萎蔫。由于多年来忽视对金针虫的防治,致使其发生量又见回升。据4月20日在中心大队一队烟苗地调查,15厘米深的耕作层每平方米有金针虫幼虫最少27头,最多87头,平均58头;又据在东河大队7队调查,3,120株烟苗(一亩)移栽后4天被金针虫为害的有497株,被害株率为15.9％。发生金针虫的地方可采取以下方法防治。①冬春深翻土壤,可压低虫源基数。②在耕地或耕后整地作畦时,每亩用6％六六六粉或呋喃丹2—3斤拌细土50斤左右,均匀撒在土表上, Insects commonly known as knock beetles, wheat, cotton, tobacco, corn, sorghum, potatoes, sweet potatoes, sugar beet and other dry crops underground pests, especially sandy loam and silt loamy occur more. Early spring when 10 cm soil temperature reached 5.7-6.7 ℃ began activities, soil temperature in early April rose to 10.8-16.6 ℃ when the peak activities. The pinworm larvae feed just germinated seeds and seize the base of seedlings, the seedlings grow, they drill into the stem feeding, the stem base is often eaten empty, the final wilt seedlings wilting. Due to years of neglect on the prevention and treatment of golden worm, resulting in its occurrence and see the recovery. According to April 20 in the center brigade a team of tobacco seedlings to investigate, 15 cm deep tillage layer per square meter has a minimum of 27 larvae, up to 87, an average of 58; and according to the East River Brigade 7 team survey, 3,120 tobacco seedlings (one acre) 4 days after transplanting, 497 were infected by golden needle insects, the victim strain rate was 15.9%. Occurrence of pinworm can take the following methods of prevention and treatment. ① winter deep spring soil, can reduce insect base. ② In the arable land or tillage for soil preparation, with 6% per acre with 6 6 6 powder or carbofuran 2-3 kg mixed fine soil about 50 pounds, evenly sprinkled on the soil surface,