▁decrease ▁the ▁number ▁of ▁n emat odes ▁in ▁the ▁field . ▁ ▁Res istance ▁ ▁There ▁are ▁some ▁resist ant ▁vari eties ▁of ▁hosts ▁that ▁will ▁not ▁be ▁affected ▁by ▁the ▁path ogen . ▁ ▁Mod er ate ▁resistance ▁is ▁presently ▁limited ▁to ▁only ▁a ▁few ▁cultiv ated ▁cro ps ▁including ▁for age ▁leg umes ▁and ▁pot ato . ▁▁ ▁There ▁are ▁not ▁very ▁many ▁vari eties ▁with ▁a ▁high ▁degree ▁of ▁resistance ▁but ▁it ▁has ▁been ▁shown ▁that ▁Pe con ic ▁and ▁Hudson ▁vari eties ▁of ▁pot ato ▁have ▁shown ▁some ▁resistance . ▁ ▁Cultural ▁practices ▁ ▁There ▁are ▁also ▁cultural ▁practices ▁that ▁can ▁be ▁helpful ▁in ▁management ▁of ▁P . ▁pen etr ans ▁including ▁clean ▁plant ing ▁stock , ▁fall ow ing , ▁and ▁cover ▁cro ps . ▁ ▁C rop ▁rotation ▁is ▁usually ▁not ▁feas ible ▁in ▁management ▁of ▁the ▁disease ▁because ▁of ▁the ▁wide ▁host ▁range ▁of ▁the ▁path ogen . ▁ ▁Rot ations ▁to ▁non host ▁cro ps ▁offers ▁limited ▁opportun ities ▁due ▁to ▁n emat odes ▁being ▁able ▁to ▁live ▁in ▁the ▁soil . ▁ ▁Control ▁practices ▁ ▁Chem ical ▁control ▁has ▁been ▁shown ▁to ▁have ▁the ▁best ▁effect ▁on ▁levels ▁on ▁n emat ode ▁concentr ations . ▁ ▁Nem atic ides ▁that ▁are ▁put ▁on ▁the ▁field ▁prior ▁to ▁plant ing ▁has ▁been ▁shown ▁to ▁reduce ▁in oc ul um ▁levels , ▁but ▁may ▁have ▁negative ▁effects ▁on ▁the ▁c rop ▁that ▁is ▁plant ed . ▁ ▁Pre - plant ▁f um ig ation ▁is ▁most