Abstract:

Peanut root knot nematode disease is a important disease in Yien-Lin growth area recently . The causal agent was identified as Meloialogyne arenaria (Neal,1989) Chitwood,1949. The 2nd stage larvae infect peanut causing stunting ,yellowing and early falling of leaves. Peanut infected root cause root knots in chain, but rarely have laternal rootlete grown from gall directly as those caused by M. hapla. The ingected shells and stems caused gall and become malformed. M. arenaria also cause galls on tomato (Sheng-kang No. 7) and watermelon (Honty baby), but not on cotton (Stoneville 7 A ).