Effect of some medicinal plant leaves on the biology of Heterodera cajani

Soil amendment with leaf powders of some medicinal plants such as neem (Azadirachata indica), madar (Calotorpis procera), behaya (Impomoea fistulosa), saijan (Moringa deifera), and arjun (Terminelia arjuna) at the rate of 1% (W/W) affected adversely entry of Heterodera cajani juvenile in roots of pigeonpea. Development and egg-laying were also delayed by amendments. Water extracts of plant leaves reduced egg-hatching and emergence of juveniles from cysts. The maximum lethal effect on second stage juveniles was produced by leaf extract of madar followed by behaya and neem.