author(s)
AKMR Hoque, AFM Aslam, AJ Howlader and MSA Mamun

abstract
An experiment was conducted to study the performance of some indigenous plant cakes against plant parasitic nematodes in tea at Entomology Laboratory, Bangladesh Tea Research Institute (BTRI), Srimangal, Moulvibazar during August 2014 to November 2015. Indigenous crude plant cakes of Marigold (Tagetes sp.) (leaves, flowers and stems), Karanja (Pongamia pinnata) (leaves and fruits), Chirota (Swertia chirayaita) (leaves and stems), Neem (Azadirachta indica) (leaves) and Mahagoni (Swietenia mahogani) (seeds) were selected for the study. Each treatment was replicated thrice. Soil samples were analyzed in the Nematology Laboratory, Entomology Division for the counting of the nematodes. Extraction was done by Baermann Funnel Method with slight modification. Then nematodes were counted through Stereoscopic microscope. The result revealed that the treatment differences were found to be statistically significant (P<0.05). All the treatments showed the toxic effect in reducing nematode populations significantly from the soil. Among them, Marigold plant cake showed the highest (78.80%) mortality of nematodes in the treated soil followed by Mahogani (77.08%) and Neem (75.40%). It is concluded that the tested plant cakes may effectively be utilized as the safer nematicidal products in integrated management of nematodes in tea.