2-5, globose, smooth, 10-19 (av. 15.1± 0.6-95% C.I.) ..urn diameter. AN<strong>THE</strong>RIDIA: Mostly absent, occasionally monocIinous and originating just below oogonium base or diclinous, 1-2/ oogonium. OOSPORES: Plerotic, wall 1-2 (av. 1.5± 0.1-95% Cil.) ..urn thick. TEMPERATURE-GROWTH RELATIONSHIPS: Minimum 5" C, optinum 25° C, maximum 30" C. Daily growth rate on CMA at 25"C 16mm. MATERIAL EXAMINED: ex soil, Nablus (FCCAU 120.1), Ram Alia (FCCAU 120.2), and Bethlahem (FCCAU 120.3). OCCURRENCE: Only a few records of this species are known. It has been isolated from soil in Germany (Schultz, 1950), Canada (Vaiirtaja, 1968), England (Ali, 1982) and the West Bank of Jordan (Ali, 1985) and from diseased plants in Germany (Schultz, 1950) and the USA (Middleton, 1943; Horsefall & Kertesz, 1933). In this work the species was infrequently isolated from diseased roots, seldom isolated from soil (found in 21% of the soils sampled), and was also infrequent in stream water. <strong>PYTHIUM</strong> SPINOSUM Sawda apud Sawda & Chen, Trans. nat. Hist. Soc. Formosa 16:199 (1926). Figs 104-106. COLONY MORPHOLOGY: Colonies on CMA showing a diffuse pattern with some aerial mycelium. MYCELIUM: Main hyphae 2.5-6(av. 4.4),um wide. SPORANGIA and zoospores not produced. HYPHAL SWELLINGS: Inercalary and terminal, globose and subglobose 13-35(av. 19.3).um diam; usually germinating by 1-3 germ tubes. OOGONIA: Terminal or occasionally intercalary, globose, 14-20(av. l7.1 ± 0.5- 95% c.l.j urn diam, echinulate, spines blunt digitate, 2-17(av. 10.0).um long. AN<strong>THE</strong>RIDIA: 1(-3)1 oogonium, mostly monocJinous, occasionally dicJinous. OOSPORES: Plerotic (oospore vol I oogonium v::Q.7S),14-18(av. IS.S± 0.S-9S% c.I.).um diam, wall O.S-I (av. 0.9± 0.1 -95% C.I.) .urn thick, ooplast 6-9 (av. 8.1).um diam. TEMPERATURE- GROWTH RELATIONSHIPS: Minimum S·C, optimum 2S'C, maximum 3SoC. Daily growth rate on CMA at 2SC 20.5mm. MATERIAL EXAMINED: ex soil, Nablus(FCCAU 147.1),' and Gaza (FCCAU 147.2;FCCAU 147.3). OCCURRENCE: Rarely isolated from irrigated fields (found in 14% of the soils sampled). 54
Figs. 109-114. Pythium salpingophorum. (109,111) oogonia. (110, 112, 114) sporangia, some proliferating. (113) apprressoria. (Bars; 10 11m). 55
- Page 1 and 2:
THE GENUS PYTHIUM In the West Bank
- Page 3 and 4:
PREFACE This monograph is aimed at
- Page 5 and 6:
SUMMARY A key to the 48 taxa of Pyt
- Page 7 and 8: Pythium species such as P. periploc
- Page 9 and 10: II. MATERIALS AND METHODS A. Isolat
- Page 11 and 12: Microscopic examination: Microscopi
- Page 13 and 14: Growth rate and temperature limits
- Page 15 and 16: 9(4) 10(9) 11(10) 12(11) 13(12) 14(
- Page 17 and 18: 29(28) 30(29) 31(30) 32(31) 33(28)
- Page 19 and 20: 46(45) 47(1) 48(47) 49(48) 50(48) 5
- Page 21 and 22: Figs. 2-7 Pythium acanthicum. (2,3)
- Page 23 and 24: Figs. 8-11. Pythium anandrumn. Spor
- Page 25 and 26: Figs. 16-19. Pythiurn anandrurn. Oo
- Page 27 and 28: Figs. 20-23. Pythium aphanidermatum
- Page 29 and 30: Figs. 24-29. (24-26) Pvthium c%rotu
- Page 31 and 32: Figs. 30-35. (30-33) Pythium debary
- Page 33 and 34: Figs. 36-41. Pythium dissimile. (36
- Page 35 and 36: Figs. 42-47. Pythium dissotocum. (4
- Page 37 and 38: Figs. 48-54. Pythium echinulatum. (
- Page 39 and 40: Figs. 55-59. Pvthium graminicola. (
- Page 41 and 42: MATERIAL EXAMINED: ex Vitia fabae,
- Page 43 and 44: PYTHIUM LrTARIL:\l Ali - Shtaveh, B
- Page 45 and 46: PYTHIUM MIDDLETON II Sparrow, Aquat
- Page 47 and 48: PYTHIUM MONOSPERMUM Pringsh., Jb. w
- Page 49 and 50: Figs. 85-90. (85) Pythium nagaii, o
- Page 51 and 52: Figs. 91-94. Pythium oligandrum.(91
- Page 53 and 54: Figs. 95-100. Pythium papillaturn.
- Page 55 and 56: PYTHIUM PULCHRUM Minden, Mykol. Unt
- Page 57: Figs. 101-108. (101-103) Pythium ro
- Page 61 and 62: FIgs. 115-120. (115) Pythium sylvat
- Page 63 and 64: Figs. 121-126. Pythium torulosum. (
- Page 65 and 66: MATERIAL EXAMINED: ex Brassica oler
- Page 67 and 68: Figs. 127-131. Pyihium vanterpoolii
- Page 69 and 70: Figs. 132-136. Pythium vexans. (132
- Page 71 and 72: V.HOST LIST A list of the vascular
- Page 73 and 74: VI REFERENCES Agrios, G.N. 1978. Pl
- Page 75 and 76: Garrett, 195 I. Ecological groups o
- Page 77 and 78: Reichert, I. 1939. Palestine: Disea
- Page 79 and 80: VII. INDEX OF FUNGAL NAMES Fusarium
- Page 81: ~I ~) ~IJ ~~I Pythium JI t'.~~~ 61:
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