Table 1.--Partial summary of research on crop evaluation and breeding for 
nematode resistance 









How resistance 
is inherited 
Citations to 
research workers 
Nematodes to 
5 Authority 
which resistant 


























ROOb NOt wc oists ols 08, 98, 5) LOS, Multigenic.... 58, 124 
ee Stem nematode.... 24, 126, 128 
Beans (green and ROOG Knob aati. S uy OG Oy LA PTO, Two recessive 8, 14 
limas) 144 genes. 
Bare ye nse aneenva. ates Cenealy root siAilsn 2, 25, 26 oe ae 
CLOVE teererelereracretel snore Rootwknotisp wit... 16,70. a =n 
WiOIGes Gio a oo oo. OURO C Gorn: Shunt «5 vista cue oT Recessive.... 97 
COWDPEa'Sin sscremntrons <feseye ROOGEUNOU... ae levsieelsxets 9 Dominant..... 9 
REMI OMIM 55 Giese ita sens 13 ois _ 
Haplolaimus sp..... 15 aa 
Rotylenchus sp..... 15 ai 
Cotton... 2.2 seeene Tylenchorhynchus sp {| 15 ane 
Trichodorus sp. .).... 15 ae 
RoObelnot.2iy.h. Rie tit 87 oe 
Cuicumberssnti ss is 2: RO Obs KNObr. cs icavareutenere 41, 149 ae 
Fruit and nut...... Hoot, esi ones 3. «4's. 82 -- 
rootstock 
Muskmelons......... MOOUL MNO. sic.sic 0/8 ages 41 a 
ORGS, Pedy eee SEE ed AEs Ze a 
Stem nematode...... oT == 
OPO SePereha yar eterselielo vee Stem nematode...... LL 233: a 
eSspedezar: caster. 7 ROOtAKNOU.. aagsite wae 59 a 
REA Che Seige on yetretars. iL Os aieus tarcittrcl aie tetaae 122 L233 7143. 9.) | Dominant..'; 24. 143 
PEDDGr Sra tecnwusttscests ic APE OKS) SH aM ORRIN EES 60, 61, 62 == 
ROCAUOCS air. aravacelat. Gomera sratsnons sysiisyat Ql om ls i | (MeN. eae 79 
RUC Cvayerarentietelencecieet yore Rice white tip..... 2 ac 
nematodes 2 
Suigarbeetisiea..25.. DU PAPDE CLs chataee e's 4 23 
SUMAN ayo a onto ROOTS KMOUS ke cieyeteier. 109 25 
SOVWOSANS Hes chsda overtees Soybean cyst....... == 
NEMATOGES). oe. desifonsvaite 116 == 
Sweet potatoes ROO MOG wae boven eit 22, 23, 40, 45, 45 
46, 102, 142 
ROO KnNOt (SD. icc. « LOR 20)F coil ROS5) | reas SC OMrs at en are 20 
03, 54, 55, 66, 
MODaCCOnmm epics sole 80, 90 121 oe 
Pratylenchus sp.... 03, 34, 55 
TOMaBOCSR-eseyreacte reins ROOG, knot wee casts etek: S039), sAosteAs, Oi eliSINeVe wesc 
48, 64, 68, 84, 1,147 

VO LO ead 


Genetic resistance is thus an established 
method in the effective control of several 
nematodes, For example, the use of resistant 
may not form, or they may not form suffi- 
ciently for nematode reproduction. 
(4) The plant responds physiologically, 
morphologically, or in other ways that react 
adversely on the parasite. 
(5) Genetic (and other) reactions of the plant 
are modified by its environment. Such effects 
include temperature, mineral nutrition, soil 
textures, and age and vigor of plant. 
131 
potatoes reduced the population of golden 
nematodes by as much as 99 percent in 2 
years (50), Likewise, the use of resistant rice 
varieties almost eradicated the seedborne 
nematodes, which cause white tip disease of 
rice (5). 

