Abstract
Field and laboratory studies were conducted on the two spotted spider mite Tetranychus urticae Koch throughout the year 2004-2005 at Gharbia governorate. The study included population fluctuations of T. urticae, Euseius scutalis and Pronematus ubiquitus on ten maize single hybrids (i.e. SC10, Pioneer30K8, SC122, SC123, SC124, SC129, YSC155, YSC3080, Bacheir13 and Watania4), and their relation with various meteorological variables. Susceptibility of different maize cultivars to the infestation with T. urticae revealed significant differences in moving stages, influence of leaf chemical components with T. urticae infestation was studied. The study revealed that the maize (YSC3080) single crosses recorded the highly significant susceptibility to infestation with T. urticae, recording averages of 235.21 and 274.50 moving stages/ 20 leaves, while single cross (SC10) more resistant to mite infestation recording averages 115.54 and 118.46 moving stages/ 20 leaves during the two successive years, respectively. Mite population reached its peak on maize during season 2004 in early September, while in the season 2005 it had two peaks, one in early August and the second in early in September, for all tested hybrids. Developmental times and reproduction rate of T. urticae were studied on leaves of four maize single crosses (i.e. YSC3080, Bacheir13, SC122 and SC10) at laboratory conditions of 28±2°C, 65±5 % RH and 16:8 L: D. Immature developmental time of T. urticae was longest on SC10 (6.7days) followed by yellow SC122 (5.5 days) than Bacheir13 and YSC3080 (5.1days). Longevity of T. urticae was 12.8, 10.4, 9.9, and 9.8 days on YSC3080, Bacheir13, SC122 and SC10, respectively. The highest net reproductive rate (Ro) was 18.79 females/ female/generation on YSC3080, and the lowest was 7.2 females/ female/ generation on SC10.
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Claims 13
Claim · model-written summary
YSC3080 was highly susceptible to mite infestation, with 235.21 and 274.50 moving stages per 20 leaves.
Zea mays.jpg?width=60){kind=small}
Tetranychus urticaeOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
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Verbatim
e0“maize (YSC3080) single crosses recorded the highly significant susceptibility to infestation with T. urticae, recording averages of 235.21 and 274.50 moving stages/ 20 leaves”
e1“Field and laboratory studies were conducted on the two spotted spider mite Tetranychus urticae Koch throughout the year 2004-2005 at Gharbia governorate.”
e2“maize (YSC3080) single crosses recorded the highly significant susceptibility to infestation with T. urticae, recording averages of 235.21 and 274.50 moving stages/ 20 leaves”
e3“Immature developmental time of T. urticae was longest on SC10 (6.7days)”
e4“The highest net reproductive rate (Ro) was 18.79 females/ female/generation on YSC3080”
t0“Maize single hybrids”
Claim · model-written summary
SC10 was more resistant, with 115.54 and 118.46 mite moving stages per 20 leaves.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“single cross (SC10) more resistant to mite infestation recording averages 115.54 and 118.46 moving stages/ 20 leaves”
e1“Field and laboratory studies were conducted on the two spotted spider mite Tetranychus urticae Koch throughout the year 2004-2005 at Gharbia governorate.”
e2“maize (YSC3080) single crosses recorded the highly significant susceptibility to infestation with T. urticae, recording averages of 235.21 and 274.50 moving stages/ 20 leaves”
e3“Immature developmental time of T. urticae was longest on SC10 (6.7days)”
e4“The highest net reproductive rate (Ro) was 18.79 females/ female/generation on YSC3080”
t0“Maize single hybrids”
Claim · model-written summary
Mite population peaked in early September in 2004.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mite population reached its peak on maize during season 2004 in early September”
e1“Field and laboratory studies were conducted on the two spotted spider mite Tetranychus urticae Koch throughout the year 2004-2005 at Gharbia governorate.”
e2“maize (YSC3080) single crosses recorded the highly significant susceptibility to infestation with T. urticae, recording averages of 235.21 and 274.50 moving stages/ 20 leaves”
e3“Immature developmental time of T. urticae was longest on SC10 (6.7days)”
e4“The highest net reproductive rate (Ro) was 18.79 females/ female/generation on YSC3080”
t0“Maize single hybrids”
Claim · model-written summary
Mite population peaked in early August and early September in 2005.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in the season 2005 it had two peaks, one in early August and the second in early in September”
e1“Field and laboratory studies were conducted on the two spotted spider mite Tetranychus urticae Koch throughout the year 2004-2005 at Gharbia governorate.”
e2“maize (YSC3080) single crosses recorded the highly significant susceptibility to infestation with T. urticae, recording averages of 235.21 and 274.50 moving stages/ 20 leaves”
e3“Immature developmental time of T. urticae was longest on SC10 (6.7days)”
e4“The highest net reproductive rate (Ro) was 18.79 females/ female/generation on YSC3080”
t0“Maize single hybrids”
Claim · model-written summary
T. urticae immature development took longest on SC10 at 6.7 days.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Immature developmental time of T. urticae was longest on SC10 (6.7days)”
e1“Field and laboratory studies were conducted on the two spotted spider mite Tetranychus urticae Koch throughout the year 2004-2005 at Gharbia governorate.”
e2“maize (YSC3080) single crosses recorded the highly significant susceptibility to infestation with T. urticae, recording averages of 235.21 and 274.50 moving stages/ 20 leaves”
e3“Immature developmental time of T. urticae was longest on SC10 (6.7days)”
e4“The highest net reproductive rate (Ro) was 18.79 females/ female/generation on YSC3080”
t0“Maize single hybrids”
Claim · model-written summary
T. urticae immature development took 5.5 days on SC122.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“followed by yellow SC122 (5.5 days)”
e1“Field and laboratory studies were conducted on the two spotted spider mite Tetranychus urticae Koch throughout the year 2004-2005 at Gharbia governorate.”
e2“maize (YSC3080) single crosses recorded the highly significant susceptibility to infestation with T. urticae, recording averages of 235.21 and 274.50 moving stages/ 20 leaves”
e3“Immature developmental time of T. urticae was longest on SC10 (6.7days)”
e4“The highest net reproductive rate (Ro) was 18.79 females/ female/generation on YSC3080”
t0“Maize single hybrids”
Claim · model-written summary
T. urticae immature development took 5.1 days on Bacheir13 and YSC3080.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“than Bacheir13 and YSC3080 (5.1days)”
e1“Field and laboratory studies were conducted on the two spotted spider mite Tetranychus urticae Koch throughout the year 2004-2005 at Gharbia governorate.”
e2“maize (YSC3080) single crosses recorded the highly significant susceptibility to infestation with T. urticae, recording averages of 235.21 and 274.50 moving stages/ 20 leaves”
e3“Immature developmental time of T. urticae was longest on SC10 (6.7days)”
e4“The highest net reproductive rate (Ro) was 18.79 females/ female/generation on YSC3080”
t0“Maize single hybrids”
Claim · model-written summary
Mite longevity was 12.8 days on YSC3080.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Longevity of T. urticae was 12.8, 10.4, 9.9, and 9.8 days on YSC3080, Bacheir13, SC122 and SC10, respectively.”
e1“Field and laboratory studies were conducted on the two spotted spider mite Tetranychus urticae Koch throughout the year 2004-2005 at Gharbia governorate.”
e2“maize (YSC3080) single crosses recorded the highly significant susceptibility to infestation with T. urticae, recording averages of 235.21 and 274.50 moving stages/ 20 leaves”
e3“Immature developmental time of T. urticae was longest on SC10 (6.7days)”
e4“The highest net reproductive rate (Ro) was 18.79 females/ female/generation on YSC3080”
t0“Maize single hybrids”
Claim · model-written summary
Mite longevity was 10.4 days on Bacheir13.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Longevity of T. urticae was 12.8, 10.4, 9.9, and 9.8 days on YSC3080, Bacheir13, SC122 and SC10, respectively.”
e1“Field and laboratory studies were conducted on the two spotted spider mite Tetranychus urticae Koch throughout the year 2004-2005 at Gharbia governorate.”
e2“maize (YSC3080) single crosses recorded the highly significant susceptibility to infestation with T. urticae, recording averages of 235.21 and 274.50 moving stages/ 20 leaves”
e3“Immature developmental time of T. urticae was longest on SC10 (6.7days)”
e4“The highest net reproductive rate (Ro) was 18.79 females/ female/generation on YSC3080”
t0“Maize single hybrids”
Claim · model-written summary
Mite longevity was 9.9 days on SC122.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Longevity of T. urticae was 12.8, 10.4, 9.9, and 9.8 days on YSC3080, Bacheir13, SC122 and SC10, respectively.”
e1“Field and laboratory studies were conducted on the two spotted spider mite Tetranychus urticae Koch throughout the year 2004-2005 at Gharbia governorate.”
e2“maize (YSC3080) single crosses recorded the highly significant susceptibility to infestation with T. urticae, recording averages of 235.21 and 274.50 moving stages/ 20 leaves”
e3“Immature developmental time of T. urticae was longest on SC10 (6.7days)”
e4“The highest net reproductive rate (Ro) was 18.79 females/ female/generation on YSC3080”
t0“Maize single hybrids”
Claim · model-written summary
Mite longevity was 9.8 days on SC10.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Longevity of T. urticae was 12.8, 10.4, 9.9, and 9.8 days on YSC3080, Bacheir13, SC122 and SC10, respectively.”
e1“Field and laboratory studies were conducted on the two spotted spider mite Tetranychus urticae Koch throughout the year 2004-2005 at Gharbia governorate.”
e2“maize (YSC3080) single crosses recorded the highly significant susceptibility to infestation with T. urticae, recording averages of 235.21 and 274.50 moving stages/ 20 leaves”
e3“Immature developmental time of T. urticae was longest on SC10 (6.7days)”
e4“The highest net reproductive rate (Ro) was 18.79 females/ female/generation on YSC3080”
t0“Maize single hybrids”
Claim · model-written summary
Net reproductive rate was highest on YSC3080 at 18.79 females per female per generation.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest net reproductive rate (Ro) was 18.79 females/ female/generation on YSC3080”
e1“Field and laboratory studies were conducted on the two spotted spider mite Tetranychus urticae Koch throughout the year 2004-2005 at Gharbia governorate.”
e2“maize (YSC3080) single crosses recorded the highly significant susceptibility to infestation with T. urticae, recording averages of 235.21 and 274.50 moving stages/ 20 leaves”
e3“Immature developmental time of T. urticae was longest on SC10 (6.7days)”
e4“The highest net reproductive rate (Ro) was 18.79 females/ female/generation on YSC3080”
t0“Maize single hybrids”
Claim · model-written summary
Net reproductive rate was lowest on SC10 at 7.2 females per female per generation.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the lowest was 7.2 females/ female/ generation on SC10”
e1“Field and laboratory studies were conducted on the two spotted spider mite Tetranychus urticae Koch throughout the year 2004-2005 at Gharbia governorate.”
e2“maize (YSC3080) single crosses recorded the highly significant susceptibility to infestation with T. urticae, recording averages of 235.21 and 274.50 moving stages/ 20 leaves”
e3“Immature developmental time of T. urticae was longest on SC10 (6.7days)”
e4“The highest net reproductive rate (Ro) was 18.79 females/ female/generation on YSC3080”
t0“Maize single hybrids”