Review of nematode interactions with hemp (Cannabis sativa) Author Bernard, Ernest C Entomology and Plant Pathology, The University of Tennessee, 370 Plant Biotechnology, Building, 2505 E J Chapman Drive, Knoxville, TN 37996 - 4560. ebernard@utk.edu Author Chaffin, Angel G Pope’s Plant Farm, Maryville, TN. Author Gwinn, Kimberly D Entomology and Plant Pathology, The University of Tennessee, 370 Plant Biotechnology, Building, 2505 E J Chapman Drive, Knoxville, TN 37996 - 4560. text Journal of Nematology 2022 2021-08-23 54 1 1 18 http://dx.doi.org/10.21307/jofnem-2022-002 journal article 298698 10.21307/jofnem-2022-002 c2d976d2-3b31-4091-802d-c11347478fda 2640-396X 11644649

Table 1. Experimental results on the use of hemp tissues and extracts for nematode management.

Treatment with hemp	Target nematode(s)	Results	Authors
Rotation crop with soybean	Heterodera glycines	J 2 numbers were reduced 30%, soybean yields increased 11% when soybean followed hemp	Zhang et al. (2013)
Chopped leaves incorporated into potted soil	Meloidogyne incognita	Reproduction on tomato reduced 74% but plant growth parameters not significantly improved	Khanna and Sharma (1998)
Chopped leaves	Tylenchorhynchus sp. Helicotylenchus sp.	42% reduction 82% reduction	Somvanshi and Gupta (2003)
Pulverized leaves incorporated into soil	Meloidogyne incognita	Galls decreased up to 54% on subsequent crop	Kayani et al. (2012)
Chopped leaves	Meloidogyne incognita	Incorporation of leaves did not improve growth of False Eranthemum infected with the nematode	Ganaie and Khan (2017)
Whole plant extract	Hoplolaimus indicus Longidorus sp. Pratylenchus sp. Xiphinema americanum	High nematode mortality	Pandey and Dwivedi (2000)
Plant extract	Aphelenchoides composticola	70% mortality after 72 hr	Khanna et al. (1988) a
Green manure or plant powder	Meloidogyne incognita Helicotylenchus dihystera Tylenchorhynchus nudus Pratylenchus zeae	For green manure, increased plant growth, reduced nematode numbers; for plant powder, reduced nematode numbers but no improvement in plant growth	Thakur (2014)
Aqueous extract of stems, leaves, inflorescences	Strongylus papillosus Haemonchus contortus (mammal parasites)	Weak effect on S. papillosu s J 1, J 2; no effect on J 3 or H. contortus	Boyko and Brygadyrenko (2019)
Ethanol extracts of roots, leaves, inflorescences	Steinernema spp. Heterorhabditis bacteriophora (EPNs)	Highest attraction of dauer juveniles was to inflorescence extracts	Laznik et al. (2020)
Water extracts of plant tissue	Meloidogyne incognita	High mortality of J 2	Singh and Singh (2002)
Root and shoot extracts	Hoplolaimus indicus Rotylenchulus reniformis Tylenchorynchus brassicae	Effective mortality of nematode species tested down to 1:10 dilution	Haseeb et al. (1978)
Root extract	Meloidogyne incognita	Inhibited egg hatch, increased juvenile mortality	Ganaie and Khan (2016)
Leaf extract	Meloidogyne incognita	74-96% juvenile mortality	Saxena and Gupta (2004)
Leaf extract	Meloidogyne incognita	88% inhibition of egg hatch	Adegbite (2011)
Water extracts from ground leaves	Meloidogyne javanica	J 2 mortality was 92% or higher at dilutions of 1:5 to 1:40	Nandal and Bhatti (1983)
Water extracts from ground leaves	Meloidogyne javanica	Activity of 10-day-old extracts to J 2 remained above 94%	Nandal and Bhatti (1986)