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Heterodera trlfolll ts reported from 3 localltles In India, occurrlng on the roots of Cajanus cajan at New Delhi and near Allgarh (Uttah Pradesh) and also associa-tion with the roots of oeadow grasa at Gulmarg, Kashmir, at an elevation of 8,700 ft. H. saccharl was found on the roots of Sacchannn spontaneum near Delhi. Both these specle s o i Heterodera are new records for India. Maize is recorded as a new host for H. avenae.

0785Y0UNG, P.A., 1964. "Control of corn nematodes with Vorlex and D-D." Plant Diaease Reporter, 48 (2), 122-123.

D-D and Vorlex (20% methyl isothiocyanate plus 80% D-D) was applied to soli lnfested with Trichodonją chrlstlei. Pratylenchus brachyurus, ^. "zeae, klphlńeaa amerlcanum, Ćrlconemofdes' and Belonolaimis'. the growth and yield of maize was greatly improved by these pre-planting treatments.

0786 WINCHESTER, J.A., 1961. 'Treli® inary investigations on the modę of actlon of pangolagrass roots ln reduclng cotton root-knot nematode (Meloldogyne incognlta acrlta) populations." Proceedinga. Soli and Ćrop Science Soclety of Florida, 20th Annual Meeting (1960), pp.178-182.

Water extracts of maturę roots of pangolagrass (Dlgltarla decumbens) prevented gal ling of cucumber roots growlng in soli lnfested with Meloldogyne incognlta acrlta. whereas extract of young roots ofpangolagrass increased gal ling compared with a water check. Pangolagrass sod leachate eliminated root-knot on white clover in 4 weeks. Leachate from newly planted pangolagrass Increased the nematode populatlon. In smali plots and in commerclal fields the effectlveness of the grass ln reduclng root-knot nematodes has been conflrmed.

0787 KRUSBERG, L.R., 1964. "Effect of gall-ing by Ditylenchus dlpsacl on pectlns in alfalfa." Nematologica, Vear 1963, 9 (3), 341-346. (German susmary p.346.1 The results of various histochemical tests on healthy laceme tlssue and on tlssue infected with Ditylenchus dlpsacl are given. Galled and healthy seeallng tlssue8 stained sloilarly with nithenlizm red, but the galled tissues stained morę deeply than did the healthy tissues with hydroxamic acid reagent. There were no consistent dlfferences in quantltles of pectlns from galled or healthy tissues in establlshed plants or seedlings. Nelther galled nor healthy luceme tissues contained detectable amounts of free galacturonlc acid or polygalacturonase. D. dlpsacl extract with a high polyga-Iacturonase activity by vlscooetric assay did not macerate lucerne seedlings during incubation. It is concluded that pecti-nolytic enzyme8 are not of major importance ln the diseases caused by this nematode ln luceme.

0788 KABLE, P.P. & MAI, W.F.,    1964.

"Ingress of Pratylenchus pene trans into alfalfa roots ln relation to soli oolsture content.^f’ (Abstract.I Phytopathology, 54 (2), 128.

An experlment, showing that Pratylenchus

penetrans in a sandy soli does not enter roots of luceme seedlings when the soil is saturated (pFO) but does so oore readily as the pF is ralsed to 2, Is brlefly reported.

0789NEMATODES. Pest Artlcles and News Suo-maries (1975) 21 (4) 416-418 (En].

In this short report of work done by Dr. R.0. Ogbuji ln Nigeria the results are given of tests for infectivity of 5 maize cultivars by a populatlon of Meloldogyne incognlta from Corchorus olltorlus. OnTy sweet corn, variety GCB, showed reTistance but lt la thought that resistance might break down after repeated exposure to the nematodes.

0790AY0DB, S.M., 1961. 'Tratylenchus zeae found on corn, milo, and^-tbree auspected new ho8t8 ln Callfornia.^,, Plant Disease Reporter, 45 (12), 940.

An lnfe8tation of Pratylenchus zeae ln a field of milo (Sorghum vulgare)~ 18 reported. P. zeae were also obtalned from roots of Cynodon dactylon. Tribulos terrestris and Echlnochioa crus-ga)ł1 whlch were grow-ing in the same field. There was a P. zeae infestation in a nearby corn (2ea~ mays)' field. Previously published hosts oTr. zeae are llsted.

0 791CHAPMAN, R.A.,    1962. "Effect of

Heterodera trjfolli on the growth of Trlfollum pratense and T. repcns.*¹ TAbstract of paper presented at the Ś3rd Annual Meeting of the American Phytopa-thologlcal Soclety, 1961.1 Phytopathology, 52 (1), 6.

In Kenland red clover lnfested with lervae of Heterodera trifolll at rates of 500, 1,000 and 6,000 larvae per half galion of soil, slgnlflcant reductlons in top growth occurred at 76, 116 and 116 days re8pectively, and total yield during 6 oonths was reduced by 59,    57    and 76%.

Injury caused by an infestation level of 300 larvae per 4 in. pot was 13% in Pilgrim Ladlno clover, 31% in Louislana white clover and 58% in Kenland red clover.

0792MARTIN, G.C., 1961. "Root-knot nema-todes infecting black wattle (Acacla mearnssi de Wild) in the Eastern Highlands ol Southern Rhodesia." Rhodesia Agri-cultural Journal, 58 (6), 374-375.

Sampling shows that root-knot is generał-ly distributed in the wattle-producing areas of the Eastern Highlands of Southern Rhodesia. The monoculture of black wattle (Acacla meamsll) and the practlce of grow-ing it in ground formerly under intenslve cultivatlon results in severe infections of Meloldogyne jąyanlca. In some samples M. arenarla was found.

0793 MILLER, R.E., B00THR0YD, C.W. 6 MAI, W.F.,    1962. "Plant paraaltlc nematodes

assoclated with corn roots in New York." [Abstract of paper presented at the 53rd Annual Meeting of the American Phytopa-thological Soclety, 1961.1 Phytopathology, 52, (1), 22.

Samples of roots and soil from 5 major malze-growlng areas affected by maize root-rot revealed high populations of plant-194 paraaltlc nematodes. Samples were taken