8342937177

Agricultural De\elopmcnr and Athisory Scnicc. Ministry of Agriculture. Fisherics and Food. (1977) No. 409 (Revised), 5 PP [En]

This revised leaflet includes information on thc EEC Directive on Ihc Marketing of Seed of Forage Crops whereby unceriified clover seed may not be marketed and certain categories of certified seed musi be fumigated if Ditylcnchus dipsaci is found during field inspection.

02 BO Reddy, D. B. (Editor) Reviews on pest disease and weed problems in rainfed crops in Asia and the Far East. Presented at the ad hoc panel of experts on post disease and weed problems in some rainfed crops, 15-19 Septcmber 1975, Bangkok, Thailand. Bangkok, Thailand; Food and Agriculture Organization of the United Nations. (1975) iii + 258 pp. [En. FAO Regular Programme No. RAFĘ 23J

References to plant-parasitic nematodes on crops in Asia and the Far East include: in Nepal, local occurrence of Aphclcnchoidcs besseyi on Taiwanese varieties of rice in the valleys and mid-hills and of Mcloidogync spp. on Brassica campcstris; in the Philippines. A. besseyi is common on rice and Hirschmanniclla has been found in many rice¹gro\ving soils but nothing is known of its effeets; M. incognira is common on mungo [Phascolus sp.) and has been found on castor; in Thailand. Mcloidogync causes stunting of soybcan seedlings.

029 0 Nigeria. International Institute of Tropical Agriculture Annual report 1974. Ibadan, Nigeria. (1975) ix -I- 199 pp. [En] From Plant Brecding Abstracts 47, 10088. 10095.

Of 241 lines of Vigna unguiculata tested in Nigeria in 1974, 4 were highly resistant to Mcloidogync incognita.

02 9 1 Sigareya, D. D. [Sigar’ova, D. D. ] [The nematode fauna of some grass crops in the Ukrainian PolessMc.) In Paraziti, porazitozi ta shlyakhi ikh likvidatsfi (Parańty, parazitosy i puti ikh likvidatsii), Vipusk I. Kiev, USSR; “Naukbva Dumka”. (1972) 190-198 [Uk. ni]

The 59 species of nematodes recorded on clover, łupin and Phlcum in the PolessMe. Ukrainian SSR, are listed and the incidence of each ecologicaJ group on each crop tabulated.

*02 9 2 Tashiro, H.; Murdoch, C. L.; APT, W. J. Plant-parasitic nematodes associated with golf putting green turf in Hawail. Plant Disease Reporter (1977) 61 (11) 919-921 (En) Dep. of Entomology, Geneva Agric. Exp. Sta., Geneva, New York, USA.

Criconemoides sp., Helicotytenchus sp., Mcloidogync sp. and Pratylenchus sp. were found in soil sam pies from bermudagrass (Cynodon dactyhn x C. transvaalensis) putting greens. Trichodorus sp. and Helicotylcnchus sp. were most frequently associated with samples from Agmstis pal ust ns greens. Thcre were no symptoms of nematode damage on any of the greens sam pled. Nematode counts from chlorotic spots and from normal turf on the same greens reveaied no correlation between population density of plant-parasitic nematodes in or outside the affected areas.

cells, hypert rophy and hyperplasia typical of nematode galls which probably prevented normal nitrogen fixation by the bacterium. There was no evidence that the Rhizobium interfered with the development of the nematodes.

02 94 Van den Berg, E.; Heyns. J. Descriptions of oew and łittle known Criconematidae from South Africa (Nematoda). Phytophylactica. (1977) 9 (4) 95-101 [En, af, fr] PI. Prot. Res. Inst., Private Bag XI34, Pretoria, 0001, S. Africa.

Nothocriconcma sanctus-francisci n.sp. was collected from coarse sand just above spring tide highwater mark at Cape St. Francis, Cape Province, South Africa and from soil around Aloe roots near the beach at Jeffreys Bay. It closeły resembles N. duplicivestitum but diflers in the longer body (328 to 568 jim compared with 340 to 400 jim in N. duplicivestitum), longer spear (72 to 99jim compared with 66 to 72 jim) which extends over 13 to 18 annules compared with II to 12, body annules 70 to 84 compared with 55 to 60, oesophagus extending over 19 to 24 annules compared with 15 to 17 and vulva 8 to 11 annules from posterior end compared with 7 to 8 in N. duplicivestitum. It differs from N. crotaloides in having a smaller spear (89 to 114 jim in N. crotaloides), fewer body annules (62 to 76 in N. crotaloides), morę posterior vulva (11 to 15 annules from taił end in N. crotaloides), morę posterior anus (7 to 9 annules from taił end in N. crotaloides compared with 3 to 5) and vulva and anus further apart (4 to 6 annules compared with 3 to 4 in N. crotaloides). Lobocriconema zeae n.sp., like N. sanctus-francisci is known from females only. It was collected round roots of Zea mays in Transvaal, South Africa. It is similar to L. aberrans but can be distinguished by the slightly scalloped posterior margins of the annules, by having 8 founded scales on each of the 6 to 9 caudal annules, by the morę anterior position of the vulva (88 to 91% compared with 91 to 95% in L. aberrans), shorter spear (54 to 59 jim compared with 68 to 78 jim). body annules 53 to 59 compared with 39 to 41, distance of vulva from terminus divided by body width at vulva 1.3 to 1.6 compared with 0.9 to 1.1, stylet length to body length 12 to 14% compared with 14 to 17% in L. aberrans. The number of body annules and their omamentation, the spear length and form of lip region distinguish L. zeae from the other South African species of the genus. Detailed, illustrated descriptions are given of Hemicycliophora halophila and H. brachyurus found in South Africa.

*0296 ARMSTRONG, J. M.; PlNKERTON, J. N.; JENSEN, J. J.

Responses of red clover germplasm to stetn nematodes in greenbouse trials. Plant Disease Reporter. (1977) 6! (12) 1060-1063 (En) Dep. of Bot. and PI. Path., Oregon State Univ., Corvallis 97331, USA.

During 1975 and 1976, 682 selections of Trifolium pratense were exposed, as seedlings, to inoculum of DityJenchus dipsaci in a search for sources of resistance. Tested entries included selections from several States in the USA and from 40 other countries. Observations during the early seedling stage indicated that all of the seedlings in 30 selections tested in 1975, and 447 of 652 selections tested in 1976, were extremcly susceptible. Additional testing of 205 rcmaining selections (those with 40% or less seedlings infected) indicated that 102 were morę than 25% susceptible. Only 27 selections of the remainder developed less than 13% infection. Of these, only four of the original 652 (1976 tests) entries were highly resistant, but nonę was immune.

*0 2 96 Johnson, A. w._; Burton, G. w.; Wright, w. C.

Reactions of sorghum-sudangrass hybrids and pearl millet to three species of Meloidogyne. Journal of Nematology (1977) 9 (4) 352-353 [En] ARS. USDA, Coastal Plain Exp Sta., Tifton, GA 31794, USA.

When hybrids of sorghum-sudangrass and cultivars of Pennisetum americanum were inoculated with Meloidogyne incognita, M. arenaria and M. javanica, both sorghum hybrids (Funk’s Hybrid 78 and Haskel Harris¹ 1746 E) were resistant to all 3 nematode species. Cultivars of pearl millet 123 varied in resistance.

1

0 29 3 HUSSAINI, S. S.; SESHADRl, A. R. Interrelationships between Mcloidogyne Incognita and Rhizobium sp. on mung bean tPhaseolus aureus). Indian Journal of Nematology (1975, publ. 1977) 5 (2) 189-199 (En) Div. of Nematol., Indian Agric. Res. Inst., New Elelhi 110012, India.

Meloidogyne incognita and Rhizobium sp. were inoculated at various levels separately, simultaneously or in $equence to Phaseolus aureus seedlings growing in pots of sterilized soil. Nematodes at any of the inoculum lcvcls used. whether added befoTe, after or simultaneously with Rhizobium ca used significant decreases in plant height, fresh and dry weights of shoots and roots, number of n od ul es on primary and secondary roots and nitrogen eon tent of the shoots and roots as compared with the nematode-free eon troi plants. Bacterial nodules invaded by nematodes showed giant