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the luceme race reproduced to a limited extent ln only some varletlea. The glant race from Morocco multlplled in all bean varieties but that from Bavaria falled to reproduce ln 2 yarletles.

082 8 JAMAL, A. Studles on the relatlonshlp between Melojdogyne lncognita and gal ling behavlour of Cicer arietlnum roota. (Correspondence]. Ctirrent Science^- (1976) 45 (6) 230-231 (EnJ Phytomedicine Res. Lab., Dep. of Botany, Aligarh Muslim Univ., Aligarh 202 001, India.

Examination of the roots of one-week-old Cicer arletlnun seedlings lnoculated vith i, 000 larvae of Melojdogyne lncognita showed that larvae en ter the root tips within 3 hours but slight swelling was not observed until 6 hours after inoculatlon. Distinct galls vere aeen after 24 hours and were confined to root tips.

0829 SINGH, N.D. Evaluation of nematode population in pigeon pea. In Blrd, J.; Maramorosch, K. (Editors) Tropical diaeases of legumes. (xiii + 171 pp). New York, USA; Academic Press. (1975) 147-149 ISBN 0-12-099950-1 (En, Price 15.25) Dept. of Crop Science, Univ. of West Indies, Trinidad, West Indies.

In the West Indies, 3 varieties of Cajanus cajan were sown in plots infested with various species of plant-parasitic nematodes. The seeds were sown at distances apart of 15, 30 or 45 ca and the nematode populations were assessed 5 months later by soil sampling. Rotylenchulus renlformls was found in the greatest numbers and was most numerou8 on the variety Trinidad Tali. Populations of Tylenchorhynchus sp. and Meloldogyne lncognita were not slgnlflcant-ly affected by varlety or sowing distance. For all varletle8, the numbers of Pratylenchus spp., R. reniformls and He1lcotyienchus dlhystera were signlfi-cantly lower on plots with plants spaced 30 co apart, than 15 or 45 cm apart. Ihe Unlver8ity of West Indies Dwarf variety supported the largest populations of the above 3 genera and of M. lncognita at a sowing distance of 15~ ca. The Indian varlety gave slmilar results, except for R. renlformls.

08 30 HUGHES, R.G. The scope for efficient pestlclde use on o 11 rape and oal2e. In British Insectlcide and Fungiclde Confer-ence (8th). Brighton, 17-20 November, 1975. Proceedings, Volume 3. London, UK; British Crop Protectlon Council. (1975) 1019-1024 (En, fr] Agrlc. Development and Advlsory Servlce, Coley Park, Reading, UK.

Although Heterodera avenae populations do not increase on maize^ the nematode can cause poor growth of malze following intensive oat or barley productlon, that has resulted ln lncreased nematode numbers. Avoldance of damage by crop rotatlons rather than by pesticides is implled. There is no mention of nematode pests of oll rape.

0831 NORTON, D.C.; HINZ, P. Relatlonshlp of Hoplolalmus galeatus and Pratylenchus hexlnclauś~to reductlon of com yields in sandy aoiis ln Iowa. Plant Disease Reporter

a976) 60 (3) 197-200 (EnJ Dep. of Bot. and Plant Path., Iowa State Unlv., Ames 5011, USA.

In experlments ln 1973 and 1974 in Iowa, USA, varlous neoatlclde treatments, uslng 1,3-D, carbofuran or CGA 12223, were applled to plots of find sand where the most important nematode parasltes of malze were Hoplolalmus galeatus and Pratylenchus hexlncl8U8^ Numbers oT h. galeatus were reduced most by 1,3-D and~of P. Rexinclsus by carbofuran. The best crop Increase and nematode control were obtained when both nemątlcldes were used: increases of 12.7% and 20.4% above the control were obtained in 1973 and 1974, respectively. It is concluded that H.    galeatus and    P.

hexlnclsu8 cause yfeld losses to malze Tn Iowa.

* 0832WALKER, J.T.; MOTSINGER, R.; MELIN, J. Effects of repeated anrtual and semi-annual nematicide appllcations to centipedegrass. (AbstractJ. Journal of Nematology (1975) 7 (4) 331 (EnJ Univ. of Georgia, Experlment, GA 30212, USA.

Although    nematode    populations

(Crlconemoldes ornatus was most numerous) under centipeHe grass (Eremochloa ophluroldesj were reduced by various nematicide treatments, the average ratings of grass coverage and appearance on treated plot8 were no different from those on control plots. This is thought to indlcate that the nematode numbers present are insufficlent to cause damage to centipede grass.

*0833ELCIN,    J.H.,. JR.; EVANS, D.W.;

FAULKNER, L.R. Factors affecting the infectlon of alfalfa seedlings by Ditylenchus dlpsaci. Journal of Nematology (19 li) 1    (4)    3Ś0-383. (EnJ Field Crops

Lab., ARS, USDA, Beltsville, MD 20705, USA.

In experlment8 to assess the factor6 affecting the lnvaslon of luceme seedlings by Ditylenchus dlpsaci relevant to tests for resistance, the authors found that to confine seedlings and nematodes in smali vlals of sand had no advantage over growing them in sand in metal trays 38 x 54 x 7.5 cm ln size; penetratlon was better in a very fine sandy-loam soli (particie size 100 to 250 cm) than ln fine sand (partieles less than mlcrons); morę nematodes invaded seedlings that were not watered lmmedlately after Inoculatlon than those that were lightly watered after inoculatlon; greatest numbers of nematodes penetrated seedlings with radlcles 0.6 to 1.3 cm long and when the inoculum was placed directly on them rather than on the soli surface. The optimum number of nematodes for use ln inoculatlons is consldered to be 50 because at this Inoculum level only 2 of 40 plants contained fewer than 10 nematodes 7 days after inoculatlon.

0834MULK, M.M.; JAIRAJPURI, M.S. Nematodes of leguminou8 crops in India. III. Three new species of Hoplolalmus daday. 1905 (Hoplolalmldae). Indian Journal of Nematology (1975 publ. 1976) 5 (1) 1-8 (EnJ Sectlon of Nematology, Dep. of Zool., Aligarh Mualim Unlv., Aligarh, India.

Hoplolalmus seshadrll n.sp. from soil around roots ~oI Arach!8 hypogaea from 200 Bundl, Rajasthan, fndia, resembles H.