蚯蚓粪及浸提液对番茄根结线虫的防治效果

通过室内生测和盆栽试验,研究了蚯蚓粪及其浸提液对南方根结线虫的防治作用。结果表明,蚯蚓粪浸提液对南方根结线虫卵囊和卵的孵化表现出明显抑制作用,当浸提液浓度为90%,卵囊孵化的相对抑制率为71.63%,离体卵的孵化率仅为11.88%。对2龄幼虫具有明显的击倒和致死作用,当浸提液浓度为90%,2龄幼虫的死亡率达88.46%。盆栽试验表明,栽培基质混入蚯蚓粪对番茄根结线虫病起到一定的控制作用,当蚯蚓粪占栽培基质的比例为75%时,对根结线虫病的防治效果可达70%以上,但对番茄的生长产生了不良影响,株高仅为47.33 cm,地上部鲜重仅为84.15 g;而当蚯蚓粪比例为25%时,番茄的生长情况最好,株高为61.33 cm,地上部鲜重为241.65 g,对根结线虫病的防治效果达到36.3%。

Evaluation of Control Effect of Vermicompost and Its Extracts on Tomato Root-knot Nematode

The control effects ofvermicompost and its extracts on Meloidogyne incognita were investigated through laboratory assasys and pot experiments.The results indicated that egg hatching was significantly inhibited with increasing the extract concentration,and at the concentration of 90％,the relative inhibition rate was 71.63％ and the hatchability rate was 11.88％,respectively.The knockdown rate and mortality of M.incognita were significantly increased with the increasing extract concentrations and treatment time.Compared with the control,the mortality rate was up to 88.46％ at the concentration of 90％.Pot experiments showed that the number of root-knot was reduced and the relative control effects were significantly improved.When the dosage of vermicompost was 75％,the control efficacy could reach 70％,but the height was only 47.33 cm and the fresh weight of aerial part was 84.15 g.However,at the vermicompost dosage of 25％,the control efficacy was 36.3％,but the height is 61.33 cm and the fresh weight of aerial part was 84.15 g,which was the best treatment for the plant growth.