Antagonistic Effects of Hybrid Sorghum and Other Gramineous Plants on Two Species of Meloidogyne and Pratylenchus

Abstract

. Eiiti YAMADA2, Ken HASHIZUME2, Minoru TAKAHASHI2, Mieko KITASHIMA3, Seiji MATSUI3 and Hideki YATSU3.Parasitism of Meloidogyne incognita, M. arenaria, Pratylenchus penetrans and P. coffeae was examined on five hybrid sorghum, other four gramineous plants (guineagrass, oat, sudangrass, Italian ryegrass) and crotalaria. Of all strains and plants examined, the sorghum strain SS701 named Tuchitaro was the most effective as an antagonistic green manure plant for the control of M. incognita and M. arenaria but not of P. penetrans and P. coffeae. Jpn. J. Nematol. 30 (1/2): 18-29 (2000).

Suppressive effects of palisade grass (Brachiaria brizantha) on Pratylenchus coffeae

“…Natsukaze is limited compared to palisade grass and bare fallow. Black oat showed good re sistance against P. coffeae in our study and that of Yamada et al (2000). However, it is susceptible to M. incognita (Tateishi et al, 2008).…”

“…Natsukaze increased the density of P. cojfeae. Moreover, Yamada et al (2000) observed that the soil nematode density after cultivation of guinea grass cv.…”

“…Hay Oats, and sorghum (Sorghum bicolor cv. Tsuchitaro; Snow Brand Seed), which is susceptible to the nematode (Yamada et al, 2000). Plants were tested twice using the same method (seedling tray tests 1 and 2).…”

“…Forage grasses have an ad vantage compared to green manures in achieving nema tode suppression and increased forage production simulta neously. Meloidogyne incognita-suppressive grasses, such as guinea grass and sorghum, are already commercially available (Araki et al, 1991;Yamada et al, 2000) but are not effective on P. coffeae (Torigoe, 1996;Yamada et al, 2000). Considering the high detection rate of P. coffeae and M. incognita in taro and sweet potato fields (Iwahori et a l, 2000), resistance against both species is needed for practical use as a nematode suppressive crop.…”

Suppression of Root-knot Nematode Damage to Next Crop by Prior Cultivation of Root-knot Nematode-resistant Sweet Potato Cultivars

“…One alternative nematode control method is the introduction of nematode-suppressive crops. Some crops are known to have nematode-suppressive effects in Japan, such as crotalaria (Kitagami et al 1992) and hybrid sorghum (Sorghum bicolor × Sorghum sudanense) (Yamada et al 2000). Cultivated as green manure, these crops are effective for improving the soil, but are not profitable.…”