REACTION OF OAT AND WHEAT CULTIVARS AND POACEOUS GRASSES TO THE CYST NEMATODE HETERODERA GOLDENI
The reaction of oat, eight wheat cultivars, and five weedy grasses to the cyst nematode Heterodera goldeni was studied in the greenhouse. The results showed that oat (Avena sativa (L.)) cv. Baladi, the common wheat (Triticum vulgare Vill.) cvs. Gemmieza 9, Gemmieza 10, Giza 168, Sids 1, Sakha 93, Sakha 94, and the durum wheat (T. durum Desf.) cvs. Bani Sewef 1 and Sohag 3 were susceptible to H. goldeni. In another test, the results indicated that the weedy grasses wild oats (Avena fatua (L).), Bermuda grass (Cynodon dactylon (L.) Pers.), jungle-rice (Echinocloa colonum (L.) Link.), barnyard grass (E. crus-galli (L.) Beauv.), and canary grass (Phalaris minor Retz.) were susceptible to H. goldeni. The tested oat, wheat cultivars, and weedy grasses were considered good hosts for H. goldeni because the nematode infected and reproduced successfully on all the plants tested. Infection with H. goldeni significantly reduced shoot and root dry weights of the oat and wheat cultivars tested.