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tobacco in India. (Abstract). In International Congress of Plant Pathology (3rd), Munchcn, GFR, 16-23 August. 1978. Abstracts of papers. Berlin and Hamburg; Paul Parey. (1978) 154 [En] Insi. fur Ncmatologie, Toppheideweg 88, 4400 Munster, GFR.

Meloidogyne spp. interacted with maize mosaic virus on maize and with tobacco mosaic virus on tobacco and tomato. The nematodes multiplied morę on virus.infecicd plants and morę gianl cells with numerous nuclei were observed than when nematodes only were present. There was greater accumulation of N, P and K in roots of plants infected with both virus and nematodes than in plants with nematodes alone. The nematodes did not act as vectors of the viruses.

u 1 8 1 BaRNES. D. K.; Sorensen, E. L.; PeaDEN, R. N.; KEHR, W. R.; ElCIN, J. H., JR.; HuNT, O. J.; DEVINE, T. E.; KawaGUCHI. i. I.; FROSHEISER, F. I.; HaNSON. C. H. Registration of seventeen populations from the BIC alfalfa germplasm pool (GP No. 55 to GP No. 71). Crop Science (1977) 17 (4) 675-676 [En] ARS, USDA, Dep. of Agronomy and Plant Gcnetics, Univ. of Minnesota, St. Paul, MN 55108, USA.

Ditylenchus dipsaci is one of 9 pests and diseases against which resistance is being developed in lucerne. The agronomie and pest resistance characteristics will be described later.

0182 CasTILLO, M. B. Reiative susceptibility, resistance and tolerance of selected crops to inoculation with Meloidogyne spp. in pots. Philippinc Phvtopathology (1976. publ.. 1978) 12 (1/2) 17-23 (En) Dep. of PI. Path.. U.P. at Los Bańos, Coli. of Agric., College, Laguna, Philippincs.

Pot experiments were carried out to test the susceptibility of a number of crop plants to Meloidogyne acrita. M. arenaria, M. incognita and M. javanica. Cotton (cv. Deltapine 16), peanut (cv. CES 101) and pigeon pea (cv. Native) were resistant to all root-knot species tested and black pepper (Piper trioicum) was resistant to M. acrita. Hawaiian ginger, cowpea (All Season), soybean (Clark 63) and strawberry (Missionery) were tolerant to M. incognita. M. incognita, M. arenaria and M. javanica respectively. Other crops tested were susceptible to one or morę root-knot species as shown by gali ratings. nematode reproduction and reduction in plant growth or yield.

0 18 3 HALPIN, J. E., 1963. “The effecc of soil fangi and root-knot nematodes on the growth of whitc clovcr in field bins." [Abstract.] Phyto-pathology, 53 (8), 877.

Observations on growth, vigour and persistcncc of wbite clovcr were madę for 5 months fol łowi ng experimental inoculations with: (i) ono of 6 soil fangi, (ii) Meloidogyne incognito and Af. incognito var. acrita or (iii) a mixturc of the nematodes and one of the fangi. The most pathogcnic organism was Sclerotium rolfsii', Fusariwn roteunt, Rhizoctonia sol ani and the nematodes were about cqual and F. oxysporurn, LcptoJiscns terrestris and Sigro spora sp. were less pathogcnic than the nematodes. Combincd with L. terrestris or -S. rolfsii tho nematodes did not givc significamly morę damage than was produced by the fangi alone, but with cach of the other 4 fangi combincd with nematodes the damage was greater than for cithcr pathogen alone. The greatest damage was in August and Septembcr and the fungus was still the dominant pathogen on the diseased clover stolcns a year later.

0184 Dundier, M. W. Development of disease-resistant lucerne cultivars for New Zealand. In 3rd International Congress of the Society for the Adiancement of Breeding Researches in Asia and Oceania (SABRAO). Plant Breeding Papers: 2. 14. Breeding pasture plants. (a) Lucerne. Canberra. Australia. (1977)    4-7 [En] Crop Res. Div., DSIR.

Christchurch, New Zealand. From Plant Breeding Abstracts 48. 7687.

A brief generał account is given of breeding lucerne varieties resistant lo fungi, Corynebacterium and to Meloidogyne.

♦ 0185 Pedersen. M. w.; Griffin. G. D. Registration of Deseret alfalfa (Reg. No. 78). Crop Science (1977) 17 (4) 671 [En] Crops Res. Lab.. Utah State Univ., Logan, USA. From Plant Breeding Abstracts 48 (6). 5581.

The Medicago sativa var. Deseret. formerly called Kayseri, is morę resistant to Ditylenchus dipsaci than is the var. Ranger.

*0 186 Sulliv_an. J. A.: Christie. B R.; Potter. J. The inheritance of resistance to the northern root knot nematode in Vernal alfalfa. [Ann. Meei. Can- Soc. Agron., Guclph. Ontario. 14-18 August 1977. Abstract.]. Canadian Journal of Plant Science < 1978) 58 (2) 585 [En] Crop Sci. Dep.. Univ. of Guclph. Guclph, Ontario NIG 2Wl. Canada.

Inheritance of resistance to Meloidogyne hapla in lucerne cv. Vernal is thought to bc quantita(ive.

*0187 ViglierchiO, D. R. Resistant host responses to len California populations of Meloidogyne incognita. Journal of Sematology (1978) 10 (3) 224-227 [En] Div. of Nematol.. Univ. of California. Davis 95616. California. USA.

Resistant and susceptible cultivars of tomato. lima beans. cotton and lucerne were tested with 10 populations of Meloidogyne incognita from different Califomian locations. Ninę of the populations diflered in aggressiveness on the 9 cultivars tested. Two populations were especially aggressive toward resistant tomato cultivars.

0188 Ahmad, M.; Ches, T. A. Histochemical root pathology of alfalfa infected by Hoplolaimus galeatus (Cobb, 1913) Thorne 1935. [Abstract]. In International Congress of Plant Pathology (3rd), Munchcn. GFR. 16-23 August. 1978. Abstracts of papers. Berlin and Hamburg; Paul Parey. (1978) 153 [En] Dep. of Plant Path., Rutgers, The State Univ., New Jersey. USA.

0189 GaUR. H. S.; Inderjit Singh Pigeon-pea cyst nematode, Heterodera cąjani, associated with the moong crop in the Punjab State. Journal of Research, Punjab AgriculturaJ Unięersity (1977) 14 (4) 509 [En] Dep. of Plant Path.. Punjab Agric. Univ., Ludhiana, India.

Examination of the roots of Phaseolus aureus and soil from a field of a poorly growing -nung crop in Ludhiana, India, revealed the presencc of large numbers of Heterodera cajani. The plants were stunted and had smali yellowish leavcs. A preliminary pathogenicity test was conducted by growing the moong variety G65 in naturally infested soil contaming about 150 larvae/100 g of soil. After 30 days, plant growth, as indicated by plant height and fresh wcight of bhoots. was significantly poorer than that of plants grown in nematode-free soil. The life-cycle of the nematode was expenmentally completed in 17 to 19 days in July. This is the first report of this species from Punjab State.

*0160 HEALY, W. B.; WlDDOWSON, J. P.; YeaTES, G- W.

The effect of nematodes on the growth and utilization of phosphorus by white clover on a yełlow-brown loam. New

Zealand Soil News (1972) 20 (5) 125-133 [En]

Three glasshouse experiments were conducted using yełlow-brown loam infested with Meloidogyne hapla and Heterodera tri folii. In the first, seedling growth of ‘Huia’ white clover was 5 limes greater in stcrilized soil than in infested soil in the first 36 days after sowing. Limiting to a depth of 10 cm gavc a smali response in clover growth but only in infested soil. In the 2nd experiment, white clover plants grown in sterilized soil for 40 days suffered marked growth depression when repotted in infested soil. Clover in infested soil required 5 times morę phosphorus fertilizer than did clover grown in sterilized soil to produce the same amount of dry matter. In the 3rd cxperiment, 7 lines of white 111 clovcr grown in infested soil all exhibited marked growth