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Register a new userEcological Study of Beet Flea Beetle, Chaetocnema tibialis (Illiger). (Chrysomelidae: Coleoptera) on Sugarbeet, Beta vulgaris L., and its Control
دراسة بيئية للخنفساء البرغوثية، tibialis Chaetocnema Beta vulgaris L.) Illiger) على الشوندر السكري و مكافحتها في منطقة حمص
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درس النشاط الموسمي لبالغات خنفساء الشوندر البرغوثية، (Illiger (tibialis Chaetocnema على ثلاثة أصناف (Ramona و Prognos و Vico) من الشوندر زرعت بموعدين في منطقـة حمـص خلال موسم 2008 . تشير النتائج المتحصل عليها أن الحشرة قد بدأ نشاطها في النصف الثاني من شـهر أيار و ازدادت كثافتها العددية لتشكل أول قمة في الأسبوع الرابع من حزيران (9.65 ثقـب/ 25 ورقـة) للموعد الأول و الأسبوع الثاني من حزيران (9.97 ثقباً/ 25 ورقة) للموعد الثاني، أما القمة الثانية فقـد اكتملت في الأسبوع الثاني من تموز بمتوسط (42.118 و 14.364 ثقباً/ 25 ورقـة) للموعـدين علـى التوالي. وجد أن الصنف Vico كان أكثر حساسية للإصابة فـي موعـدي الزراعـة بمتوسـط (99.50 و 45.116 ثقباً/25 ورقة) على الترتيب، في حين كان صنفا Ramona و Prognos أقل حساسية. بدأت الإصابة منخفضة في بداية الموسم بمتوسط (01.2 و 96.2 ثقباً/25 ورقة) في الأسبوع الثالث من أيـار و ازدادت تدريجيا في الأسبوع الرابع من حزيران بمتوسط (90.65 ثقباً/ورقة) للموعد الأول، و الأسـبوع الثاني من حزيران بمتوسط (90.97 ثقباً/25 ورقة) للموعد الثاني، و في نهايـة الموسـم وصـلت إلـى 42.118 و 14.364 ثقباً/25 ورقة للموعدين على الترتيب، حيث ازدادت الإصابة فـي موعـد الزراعـة الثاني (النصف الأول من شباط) بضعفي الإصابة على موعد الزراعة الأول (النصف الأول مـن كـانون الثاني). و استخدمت ستة مبيدات كيميائية لمكافحة خنفساء الشوندر البرغوثية، فأظهرت النتـائج تفـوق مبيد Cyperino فبلغت فعاليته 88.90 % و تلاه مبيد Cypermethrin بـ 69.90 % مقارنـة بمبيـد Nimadol) 35.49 %) بعد أسبوعين من المعاملة.
The seasonal activity of beet flea beetle, Chaetocnema tibialis (Illiger), adults was studied on sugar beet varieties at Homs Region during 2008 season. Results obtained indicate that the beet flea beetle, Chaetocnema tibialis (Illiger) adults was started at the 2nd week of May to all varieties in the 1st and 2nd dates of plantation. The number tended to increase, rather gradually, from early June reaching peak (65.9 and 97.9 holes/25 leaves) for two dates. Two peaks occurred during 2008 season, ware as follows: • The 1st peak occurred in the 4th week and the 2nd week of June (65.9 and 97.9 holes/25 leaves) for 1st and 2nd dates, respectively. • The 2nd peak occurred in the 4th week of July (118.42 and 364.14 holes/25 leaves) for 1st and 2nd dates, respectively. The results obtained indicate, that Vico sugerbeet variety was highest susceptible (50.99 and 116.45 holes/25 leaves) for the 1st and 2nd dates, meanwhile, Ramona and Prognos were lowest infested. The infestation started with quite low holes (2.96 holes/25 leaves) at the 3rd week of May and increased gradually at the 4th week of June with 65.90 holes/leaf, and in end of season arrived to (118.42 holes/25 leaves). The infestation percentage increased by beet flea beetle in the 2nd date (the 1st week of February) with twice of infested on the 1st date (the 1st half of January). Six pesticides were evaluated against beet flea beetle, results showed that Cyperino pesticide gave the highest effective percentage (90.88%) followed Cypermethrin by (90.69%), in comparison with Nimadol pesticide (49.35%) after two week of treatment.
References used
Baselga A. and Novoa F. 2000a. Los Chrysomelidae (Coleoptera) de los sistemas dunares de Galicia (Noroeste de Espan˜ a). Bol. Real Soc. Espan˜ ola Hist. Nat. (Sec. Biol.) 96(12): 113–124
Baselga A. and Novoa F. 2000b. Los Chrysomelidae (Coleoptera) de la Sierra de Ancares, Noroeste de la Espan˜ a (Coleoptera). Nouvelle Rev. d’Entomol. (N.S.) 17(2): 165–180
Baselga A. and Novoa F. 2002. Los Chrysomelidae (Coleoptera) de las sierras orientales de Ourense (Galicia, noroeste de la Penı´nsula Ibe´ rica). Bol. Asoc. Espan˜ ola Entomol. 26(3–4): 57– 73
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The efficacy of insecticide and plant extracts were tested against beet flea
beetle, Chaetocnema tibialis (Illiger) during 2008 and 2009 seasons. Six
pesticides were evaluated against beet flea beetle, results showed that Cyperino
gave the highest
effective percentage (90.88) followed by Cypermethrin
(90.69%), in comparison with Nimadol (49.35%) after two weeks of treatment.
Four plant extracts were evaluated against beet flea beetle in comparison with
Sopreen. Results showed that Melia azedarach L. extract gave the highest
effective percentage (60.81) followed Styrax officinalis L. leaves and branches
and Capsicum annuum L. extracts by 31.35, 28.44 and 16.57, respectively, in
comparison with Sopreen (58.55%) after 7 days of treatment. Percentage of
efficacy decreased gradually by increasing the period of exposure after
treatment for plant extracts from 63.19% after 3 days to 51.80% after 10 days
of Melia azedarach L. extract. Whereas the efficacy percentage of Sopreen
increased from 41.67% after 3 days to 74.57% after 10 days of treatment.
The research was carried out at Agricultural Scientific Research Center of Hama
in tow season 2010/2011. Aiming to evaluate the effect of nitrogen fertilization and
planting date on some Productive and Technological characters of sugar beet Mono
g
erm(Simper cultivar) and Multi germ (HM10 cultivar). Results showed an effect of
fertilization on productive and technological characters of sugar beet. Increasing the rate of
nitrogen fertilizer to 250kg N.ha¹ caused a significant increase in root yield and actual
sugar yield (12.88 , 12.15 ton . ha¹) respectively, but it badly affected the sugar content in
the roots, juice polarity and juice purity (14.68, 15.95, 80.45%) respectively. Mono germ
Simper was found significantly superior compared to Multi germ HM10 in root yield, Brix,
root sugar content and juice polarity. Results showed that planting date 1/11 was found
significantly superior compared to dates 1/10, 15/10 for root yield, Brix, juice purity,
actual sugar yield. In conclusion, Simper (Mono germ) was suitable in planting date 1/11 at
nitrogen level of (200-250kg N.ha¹).
The field experiment was conducted Al Raqqa research station, the General
Commission for Scientific Agriculture Research (GCSAR),. during the
2011/2012- growng season to compare quality traits of four monogerm fodder
beet varieties, i.e. Jamon, Sp
lendids, Starmon and Vermon. The experiment
was run in Autumn during November and in Winter during January.
Experiment was carried out in accordance with the split plot design with three
replications. The results of the comparison test T-Test preference fodder beet
cultivation in the autumn compared with winter, but by a small percentage in
most of the quality traits. The results also showed that the monogerm variety
Vermon was the best in most of the quality traits as compared with the other
varieties, followed by Starmon. It was recomended to cultivate fodder beet in
both autumn and winter under Al Raqqa conditions, but after conducting a
complementary researches concerns the other agricultural treatments as, lifting
time, plant spacing, fertilization …etc, and to test more monogerm and
multigerm varieties from different sources.
The study has shown that the apparent bulk density of soil increases with the increase
of compression and moisture during press. The maximum rate of increase in depth was 0 –
20 cm that amounted 0.38g/cm3 at compression by 257.44-kilopascal and moi
sture
average at compression by 19.03% (equal to 60% of the field capacity average of the soil)
in comparison with the non-existence of compression. In addition, the size of the pores
bigger than 50 microns decreased at the same above compression and above moisture in
depth of zero – 20 cm by 20.20%. The size of pores bigger than 10 microns decreased by
20.65% in comparison with the non-existence of compression. While it was noted that the
the maximum loss of root yield that amounted 17.52%, at compression by 257.44
kilopascal, and moisture 19.03%.
The study was conducted on winter date (15th of Febraury), during 2015 and
2016 seasons, to study the effect of spraying calcium chloride CaCl2
concentrations (2, 4, and 6%), on the manufacture traits assigned in randomized
completely block design (RCBD) with four replicates.
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