唐山专区是河北省花生主要产区,近年由于花生线虫的扩展蔓延,产量受到很大影响。1956年全专有三个县发生此病,1964年已蔓延到十个市县。据调查:亩产三百斤左右的无病花生地,一旦发病产量就下降为六、七十斤,严重时仅收二、三十斤秕果,因而影响群众种植花生的积极性。鉴于以上严重情况,我所与省植物保护 Tangshan area is the main producing area of ​​peanut in Hebei Province, due to the spread of peanut nematodes in recent years, the yield has been greatly affected. In 1956, the endemic disease occurred in three counties and in 1964 it spread to ten cities and counties. According to the survey, about 300 kilograms of diseased peanuts per mu will be reduced to six or seventy kilograms in the event of illness and only two or thirty pounds will be collected in severe cases, thus affecting the enthusiasm of the masses in planting peanuts. In view of the above serious situation, I plant with the provincial protection