生防制剂与呋喃丹颗粒剂防治根结线虫幼虫的效果

印度南方根结线虫广泛地分布于印度南部灌桑园，特别是轻质土壤的桑园，它严重地影响桑叶的产量和质量，人们曾采用农业和化学等防治措施进行桑园线虫的防治，但效果并不理想，为此，考虑用生物防治方法来进行试验研究，本研究采用拟青霉和轮枝孢真菌两种生防制剂及化学杀线虫剂呋喃丹颗粒剂对线虫幼虫进行致死性试验。每种生物制剂滤液设置3个浓度，分别为100％，75％，和50％，结果发现，该两种真菌制剂在滤液浓100％下72h后的杀虫率分别为73．55％和78．45％，两者无显著差异。虽然它们对幼虫的致死效果比化学杀线虫剂呋喃丹效果略微差些，但生物剂对自然环境，人畜安全，因此，生物制肯望成为更经济，更安全的杀线虫剂。

Effect of bio-control agents and Furadon 3G on the juvenile mortality of root knot nematode Meloidogyne incognita

The root knot nematode Meloidogyne incognita is widely distributed in irrigated mulberry gardens of South India especially in light textured soils. It causes significant reduction in leaf yield and quality. Hence a number of control measures which include cultural, biological and chemical methods have been suggested to bring down the nematode population in mulberry gardens. However, since both cultural and chemical methods have some practical problems in implementation in addition to their advantages, an alternative method of nematode control by using bio-control agents is considered and was taken for study. In this study the bio-control agents namely Paecilomyces lilacinus and Verticillium chlamidosporium along with chemical nematicide Furadon 3G were taken. Culture filtrates of these two bio-control agents with 100%, 75% and 50% concentration were taken to find out the nematode juvenile mortality rate at different durations. The two bio-control agents, Paecilomyces lilacinus and Verticillium chlamidosporium have shown nematicidal effect of 73.55% and 78.45% at 100% concentration of culture filtrates after 72 h duration, through the difference between these two is not significant. Further it is noticed that though less effective than chemical nematicide Furadon 3G on the mortality of the juveniles, bio-control agents are safe, environmental friendly in nature, which can be used as bionematicides economically and eco-safely.