El-Sherif., A., Khalil, A., Refaei, A., Nour El-Deen, A. (2006). OCCURRENCE OF WHITE-TIP NEMATODE. Aphelenchoides besseyi IN CERTAIN RICE CULTIVATIONS AT SOUTH DAKAHLIA GOVERNORATE. EGYPT AND ITS MANAGEMENT UNDER FIELD CONDITIONS.. Journal of Plant Protection and Pathology, 31(5), 3215-3223. doi: 10.21608/jppp.2006.235219
A. G. El-Sherif.; A. E.M. Khalil; A. I. Refaei; A. H. Nour El-Deen. "OCCURRENCE OF WHITE-TIP NEMATODE. Aphelenchoides besseyi IN CERTAIN RICE CULTIVATIONS AT SOUTH DAKAHLIA GOVERNORATE. EGYPT AND ITS MANAGEMENT UNDER FIELD CONDITIONS.". Journal of Plant Protection and Pathology, 31, 5, 2006, 3215-3223. doi: 10.21608/jppp.2006.235219
El-Sherif., A., Khalil, A., Refaei, A., Nour El-Deen, A. (2006). 'OCCURRENCE OF WHITE-TIP NEMATODE. Aphelenchoides besseyi IN CERTAIN RICE CULTIVATIONS AT SOUTH DAKAHLIA GOVERNORATE. EGYPT AND ITS MANAGEMENT UNDER FIELD CONDITIONS.', Journal of Plant Protection and Pathology, 31(5), pp. 3215-3223. doi: 10.21608/jppp.2006.235219
El-Sherif., A., Khalil, A., Refaei, A., Nour El-Deen, A. OCCURRENCE OF WHITE-TIP NEMATODE. Aphelenchoides besseyi IN CERTAIN RICE CULTIVATIONS AT SOUTH DAKAHLIA GOVERNORATE. EGYPT AND ITS MANAGEMENT UNDER FIELD CONDITIONS.. Journal of Plant Protection and Pathology, 2006; 31(5): 3215-3223. doi: 10.21608/jppp.2006.235219
OCCURRENCE OF WHITE-TIP NEMATODE. Aphelenchoides besseyi IN CERTAIN RICE CULTIVATIONS AT SOUTH DAKAHLIA GOVERNORATE. EGYPT AND ITS MANAGEMENT UNDER FIELD CONDITIONS.
1Nematology Res. Unit. Agric. Zoology Dept.. Fac. of Agric.. Mansoura Univ.
2Plant Pathology Res. Inst. Agric. Res. Center, Giza. Egypt.
Abstract
Examination of the vegetative stage. as well as panicles at harvest (fresh) and
seed samples from farmer's store (12 months) of rice cvs. Sakha 101 8 103 and
Rehio grown in South Dakahlia fields for Aphelenchoides besseyi symptoms on
leaves recorded the whitening of the leaf tip for the vegetative stage. and the
shortened twisted. chlortic strips along one edge of the leaf for the flowering and
harvest stages of the rice cultivars studied. Results also indicated that a total of
18.27% of the stored grains and 6.66% of the fresh grains were obviously infested
with A. besseyi. Moreover. rice cv. Sakha 101 appeared to be the most susceptible to
A. besseyi with infestation levels amounted to 22.22% and ?.5% and number of
nematodes per 100 seeds 115 and 30 individuals for stored and fresh rice seeds.
respectively. Panicles of rice cv. Sakha 101 with white-tip disease symptoms were
obviously shorter by 16.08%. lighter by 38.63%. decreased by 53.71% of 1000 grains
weight with sterile grains amounted to 41.53% as compared to those of panicles
without any clear disease symptoms. Number of A. besseyi was higher in the
diseased panicles than those without apparent disease symptoms. which was
amounted to 160 and 15 individuals per 100 seeds. respectively. Length of flag leaf
averaged 5.3 cm in plants with disease symptoms. -
With respect to A. besseyi management on rice plant cv. Sakha 103 during the
rice growing season 2003 with the tested four chemical pesticides as well as the two
plant extracts data revealed that all tested materials obviously reduced nematode
population. Moreover. periwinkle Vince rosea accomplished the highest percentage
of nematode reduction with value of 55.71% in shoot. followed by Dimathoate
(25.88%). whereas thorne apple. gave the least value of nematode reduction (1.62%)
when compared with the untreated plots. respectively. Moreover. the bioagent. V.
rosea achieved the highest reduction percentage of nematode population in grains
(83.3%) and surpassed all tested compounds in increment grains weight (61.4%)
followed by Dimathoate (54.6%).
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