scholarly journals THE INFLUENCE OF PLANTING DATES AND DOSES OF FERTILIZERS ON THE INFECTION OF POTATO SPROUTS WITH RHISOCTONIA SOLANI KUHN AND MISCELLANEUS ROT TYPES

2014 ◽  
Vol 19 ◽  
pp. 68-72
Author(s):  
R. V. Ilchuk ◽  
L. A. Ilchuk
Keyword(s):  
Mineral Fertilizers ◽  
Planting Dates ◽  
Manure Application ◽  
Late Planting ◽  
Early Planting ◽  
Planting Material ◽  
Early Maturing ◽  
Maturity Groups

The infection of potato planting material depends on the planting timing, doses of fertilizers and maturity groups of varieties. The largest (2.8–3.7 %) amount of tubers infected with Phisoctonia Solani Kuhn was observed in the variants with early planting dates. At late planting the reduced tubers infection with the black scab was observed, along with the increased moldering of planting tubers from 0.4 % to 7.2 % especially for early maturing varieties. Higher tubers infection (2.2–2.6 %) with black scab was noticed in variants with manure application (40 t/ha). Application of mineral fertilizers on manure background had resulted in the decrease of black scab infection of tubers by 0.8–0.9 %.

Effects of planting date and dinocap applications on the control of powdery mildew and yields of seed and seed oil in coriander

2000 ◽  
Vol 135 (2) ◽  
pp. 193-197
Author(s):  
A. KALRA ◽  
T. N. PARAMESWARAN ◽  
N. S. RAVINDRA ◽  
M. GOPAL RAO ◽  
SUSHIL KUMAR
Keyword(s):  
Powdery Mildew ◽  
Disease Severity ◽  
Seed Oil ◽  
Planting Date ◽  
Planting Dates ◽  
Early Planting ◽  
Early Maturing ◽  
Levels Of Control

Experiments were conducted during 1992/93 and 1993/94 to determine the effect of different planting dates and dinocap applications on control of powdery mildew and yields of early and late maturing coriander cultivars. Early plantings resulted in lower overall disease severity values for both the cultivars, but the late maturing cultivar S-33 benefited more than RD-44, an early maturing cultivar. Early planting resulted in smaller increases in yield in RD-44 but provided considerable economic gains in S-33. Further, it was possible to achieve similar levels of control of powdery mildew and yields in coriander with fewer dinocap applications by early plantings of both the cultivars. Therefore, to reduce the fungicide inputs, it is important that emphasis should be placed on early plantings for managing powdery mildew especially in environments conducive for its development.

scholarly journals NC 98-608: MANAGING THE POTENTIAL NEW SWEETPOTATO (Ipomea batatas) CLONE RELEASE

HortScience ◽  
2005 ◽  
Vol 40 (3) ◽  
pp. 869b-869
Author(s):  
Allan C. Thornton ◽  
Jonathan R. Schultheis
Keyword(s):  
Yield Potential ◽  
Row Spacing ◽  
Harvest Time ◽  
Planting Dates ◽  
Late Planting ◽  
Early Planting ◽  
Ipomea Batatas ◽  
Early Harvest ◽  
Over Time ◽  
Made In

The goal of this research was to determine the effects of in-row spacing and planting time on yield and root grade of NC 98-608 over time. Two plantings were made in two grower locations (four total). An early planting was made 19 and 25 May and a late planting 19 and 24 June. NC 98-608 was evaluated at the following in-row spacings; 23, 31, 38, and 46 cm. `Beauregard' spaced at 23 cm in-row and was used as the standard comparison. Roots were harvested and graded into canner, number one, jumbo and cull grades 90, 105, and 120 days after planting for each of the planting dates and locations. Each grade was weighed. An early planting in late May resulted in roots reaching the highest percentage grade of U.S. number one roots as early as 100 days after planting, while the late planting in June resulted in roots never reaching their full number one yield potential in some cases. For an early harvest after planting (90 days after planting) the 38 cm in-row spacing produced the most marketable number one yields compared with the 23, 31, and 46 cm in-row spacings. For a later harvest time after planting (105 days or later), it appeared as though the 31 cm in-row spacing was the most economical spacing to use. Roots from the early plantings (late May) and finer textured soils appeared to have shorter roots than roots harvested from later plantings (after 15 June) or coarser textured soil. Root shape and yield was more uniform with NC 98-608 than with the Beauregard clone. With yields comparable to Beauregard, the NC 98-608 clone provides an excellent opportunity to produce a quality sweetpotato with consistent shape.

Productivity of chickpea varieties depending on the time of sowing seeds in the conditions of Uzbekistan

2020 ◽  
Author(s):  
S.B. Mustanov S.B. ◽  
◽  
U.E. Umurzakova U.E.
Keyword(s):  
Plant Growth ◽  
Planting Dates ◽  
Late Planting ◽  
Early Planting ◽  
Sowing Dates ◽  
The Impact ◽  
Number Of Seeds

The article presents data on the impact of different sowing dates on the productivity of chickpea varieties in Uzbekistan. With early planting dates for chickpeas of various varieties (in February), plant growth, the formation of beans, the number of seeds in beans and yield are much greater than with late planting dates (April).

scholarly journals Temporal Dynamics of Soybean Rust Associated With Leaf Area Index in Soybean Cultivars of different Maturity Groups

Plant Disease ◽  
2015 ◽  
Vol 99 (9) ◽  
pp. 1216-1226 ◽  
Author(s):  
E. N. Moreira ◽  
F. X. R. Vale ◽  
P. A. Paul ◽  
F. A. Rodrigues ◽  
W. C. Jesus Júnior
Keyword(s):  
Leaf Area Index ◽  
Leaf Area ◽  
Planting Date ◽  
Soybean Rust ◽  
Relative Area ◽  
Planting Dates ◽  
Area Index ◽  
Progress Curve ◽  
Early Maturing ◽  
Maturity Groups

Experiments were conducted in Mato Grosso, Brazil, from 2009 to 2011 to evaluate the effects of planting date (October, November, December, and January) on soybean rust (SBR) and leaf area index (LAI) in SBR-susceptible soybean cultivars of different maturity groups (early-maturing, midseason, and late-maturing). Mean relative area under the LAI progress curve (RAULAIPC) was significantly higher (P < 0.05) for the late-maturing than early-maturing and midseason cultivars. The October planting date had significantly higher (P < 0.05) mean RAULAIPC than the December and January planting dates. Mean relative area under the SBR progress curve was significantly lower (P < 0.05) for the late-maturing than the midseason and early-maturing cultivars, and significantly higher (P < 0.05) for the December and January than the October and November planting dates. Based on the logistic population growth model, SBR severity increased over time at a significantly higher mean rate for the early-maturing than the midseason and late-maturing cultivars. It took longer for SBR to reach a certain severity level for the late-maturing cultivar planted in January than the early-maturing cultivar planted in October. This implies that fungicides would need to be applied early to the early-maturing cultivar planted in October to minimize yield loss.

Influence of Soybean (Glycine max)Planting Date on Velvetleaf (Abutilon theophrasti)Competition

Weed Science ◽  
1979 ◽  
Vol 27 (2) ◽  
pp. 183-188 ◽  
Author(s):  
L. R. Oliver
Keyword(s):  
Glycine Max ◽  
Growth And Development ◽  
Early Growth ◽  
Photoperiodic Response ◽  
Planting Date ◽  
Abutilon Theophrasti ◽  
Growth Stages ◽  
Planting Dates ◽  
Late Planting ◽  
Early Maturing

A 2-yr study was conducted to determine the influence of early and late soybean [Glycine max(L.) Merr.] planting dates on the competitiveness of velvetleaf (Abutilon theophrastiMedic). Velvetleaf was planted at densities of one plant per 61 and 30 cm of row, and competition ranged from 4 weeks to full season. Soybean planting dates were mid-May and late-June. Velvetleaf emerging with soybeans in mid-May were twice as competitive as those emerging with soybeans planted in late-June. A density of one velvetleaf per 30 cm of row competing full season reduced soybean yields 27% for the early and only 14% for the late planting date. The competitive difference was due to the short-day photoperiodic response of velvetleaf. Although the early growth stages of soybeans are more competitive than those of velvetleaf, 10 weeks after emergence velvetleaf competition reduced soybean growth and development. Velvetleaf does not appear to be a potential major problem in Arkansas for soybeans planted in June due to its photoperiodic response and late season competitiveness. However, the weed could present problems for soybeans planted early, especially when an early maturing variety is used.

Effects of planting date and earliness on deoxynivalenol contamination in barley under natural epidemic conditions

2014 ◽  
Vol 94 (8) ◽  
pp. 1363-1371 ◽  
Author(s):  
Thin Meiw Choo ◽  
Richard A. Martin ◽  
Marc E. Savard ◽  
Barbara Blackwell
Keyword(s):  
Prince Edward Island ◽  
Integrated Management ◽  
Planting Date ◽  
High Yield ◽  
Head Blight ◽  
Planting Dates ◽  
Late Planting ◽  
Barley Cultivars ◽  
Early Planting ◽  
High Level

Choo, T. M., Martin, R. A., Savard, M. E. and Blackwell, B. 2014. Effects of planting date and earliness on deoxynivalenol contamination in barley under natural epidemic conditions. Can. J. Plant Sci. 94: 1363–1371. Fusarium head blight, principally caused by Fusarium graminearum Schwabe, is a destructive disease of barley in many countries and it can result in mycotoxin contamination such as deoxynivalenol (DON) in the grain. An integrated management strategy is needed to mitigate the level of DON contamination in barley. Therefore, a study was initiated to determine if early planting and early-heading cultivars can be used to avoid severe DON contamination under natural epidemic conditions in the Maritimes. Twelve six-row barley cultivars were planted in a split-plot design with two planting dates (early vs. late) as main-plot units and cultivars as sub-plot units at the Harrington Research Farm in Prince Edward Island in 2007, 2008, 2010, 2011, and 2012. Grain samples from all experimental plots were contaminated with DON and one contained as high as 23.1 mg kg−1. Early planting frequently resulted in less DON contamination and higher yield than late planting. Days to heading was positively correlated with DON concentration only at late planting in 2007. The results of this study suggest that six-row barley should be planted early in the Maritimes to avoid a high level of DON contamination and a reduction in grain yield, and that use of early-heading cultivars may not be effective at reducing DON contamination while retaining high yield.

scholarly journals The effects of seed priming, planting date and density on the silage yield of corn (Zea mays L.) in summer delayed sowing

2019 ◽  
Vol 64 (2) ◽  
pp. 133-145
Author(s):  
Farshid Alipour-Abookheili ◽  
Hamid-Reza Mobasser ◽  
Morteza Siavoshi ◽  
Farshid Golmaei
Keyword(s):  
Block Design ◽  
Seedling Emergence ◽  
Seed Priming ◽  
Planting Date ◽  
Planting Density ◽  
Distilled Water ◽  
Planting Dates ◽  
Late Planting ◽  
Early Planting ◽  
Four Levels

To determine the effects of seed priming, date and density of planting on the silage yield of corn (Ks.c704 cultivar) in summer delayed planting, an experiment was carried out as a split-split plot in a randomized complete block design with four replications in 2015 and 2016. Treatments were examined including two planting dates (July 27 and August 13) as main plots, two planting densities (7 and 9 plants per m2) as sub plots and four levels of seed priming (without priming, distilled water, 0.5% KNO3 and 10% PEG(8000)) as sub-sub plots. The results showed maximum of the speed and percentage of seedling emergence at the first year. The number of days decreased from planting date until 8- and 12- leaf stages in seed priming by the distilled water method. The silage yield decreased (26.69%) with the late planting (13 August), but the speed of seedling emergence increased. The planting density (9 plants/m2) yielded the highest percentage of lignin, speed of seedling emergence, plant height and silage yield. The highest ratio of the ear fresh weight to the total silage weight was obtained by the late planting date (13 August) and seed priming with the PEG method. The maximum value of the silage yield (45,566.41 kg/ha) was produced by the early planting date (27 July) and higher planting density (9 plants/m2). Thus, to increase seedling emergence speed and to obtain maximum silage yield, early planting date (27 July), higher planting density (9 plants/m2) and seed priming by the distilled water method are recommended.

scholarly journals STALK LODGING RESISTANCE OF CORN HYBRIDS DEPENDING ON THE PLANTING DATE

2019 ◽  
pp. 94-110 ◽  
Author(s):  
Vitalii Palamarchuk ◽  
Oleh Kolisnyk
Keyword(s):  
Growing Season ◽  
Planting Date ◽  
Early Group ◽  
Corn Hybrids ◽  
Lodging Resistance ◽  
Total Contribution ◽  
Late Planting ◽  
Research Results ◽  
Early Planting ◽  
Maturity Groups

Purpose. To study the effect of the planting date on the number of the lodged stalks, place of stem breaking and productivity of corn hybrids of various maturity groups. Methods. Field, laboratory, statistical. Results. In the studies, three planting dates were studied, in particular, early date with the soil temperature regime (STR) at the seeding depth of + 8°С, mid date with STR – + 10°С and late date with STR – + 12°С for corn hybrids of different maturity groups (early group – Kharkivskyi 195MV, DКС 2870, DКС 2960, DКС 2949, DКС 2787, DКС 2971 (st), mid-early group – DКС 3476, DКС 3795, DКС 3472, DКС 3420, Pereiaslavskyi 230SV, DКС 3871 (st) and mid group – DК 391, DКС 3511, DК 440, DКС 4964, DКС 4626, DК 315 (st) and their effect on the productivity and number of the lodged stalks after a 15-day overripe in the field after full maturity of kernels. According to the research results, the number of lodged stalks in the group of early hybrids was 11.1%, in the group of mid-early hybrids – 9.0%, and in the group of mid hybrids – 6.2%. So that hybrids with a longer growing season had higher lodging resistance than early forms due to better developed mechanical tissue of the lower stem. A significant change in the number of the lodged stalks was observed in the maturity groups depending on the genetic features of the hybrid (factor B). Hence, over the years of research, in the group of early hybrids, the smallest number of the lodged stalks, was observed in such hybrids as DKC 2960 – 4.9% and DKC 2971 – 7.4%, in the group of mid-early hybrids – DKC 3476 – 4.6% and Pereiaslavskyi 230SV – 8.2%, and in the group of mid hybrids – DKC 4964 – 3.6%, DKC 4626 – 4.9%, DK 391 – 5.1% and DK 440 – 5.8%. The research results also established the effect of the planting date on the productivity and number of the lodged stalks in the studied corn hybrids. Thus, on average over three years, under early planting, the number of the lodged stalks in the group of early hybrids was 17.1%, in the group of mid-early hybrids – 14.3%, and in the group of mid hybrids – 10.4%, whereas when applying the second planting date the number of the lodged stalks was 10.5%, 7.3% and 6.1%, while under late planting date – 5.6%, 5.4% and 2.2%, respectively, for the early, mid-early and mid hybrid group of hybrids. Conclusions. Therefore, according to the research results it can be concluded that later planting date reduces both the total number of the lodged stalks (by 8.2-11.5%) compared with the early sowing and the number of plants that have lodged below the place of cob formation (by 6.6-9.9%). The smallest number of the lodged stalks (6.2%) was observed in the hybrids of the mid group of maturity compared to the mid-early group (9.0%) and early group (11.1%) of hybrids. The same was observed with the number of the plants that have lodged below the cob – 3.3%, 5.8% and 6.0%. There has been established the dependence between the yield and number of the lodged stalks depending on the planting time, so that the yield ranged within 8,4-9,4 t/ha in the group of early hybrids under early planting , 7.2-8.7 t/ha under mid one, 6.4-7.7 t/ha under late one, and the number of fall lodged stalks – 17.1%, 10.5% and 5.6% respectively under early planting, mid planting and late planting, in the mid-early group – 9.7-10.9 t/ha, under mid planting – 8.7-10.0 t/ha, late – 7.2-8.6 t/ha, and the number of the lodged stalks – 14.3%, 7.3 % and 5.4% and mid hybrids –11.5, 10.2 and 9.2 t/ha and 10.4, 6.1 and 2.2%, respectively. According to the factor analysis, it has been established that the planting date makes a significant contribution (17% of the total contribution) to the lodging resistance of plants of corn hybrids. The number of the lodged stalks varies considerably depending on the conditions of heat and moisture supply. An increase in the number of the lodged stalks was observed in 2012 (11.6%), compared to 2011 (10.8%) and 2013 (3.9%) due to the moisture deficiency during the growing season of corn that year.

scholarly journals Yields of maize of different maturity groups depending on the planting dates and plant density in the northern zone of the Krasnodar Territory

2020 ◽  
Author(s):  
S.A. Kiryachek ◽  
◽  
T.R. Toloraya ◽  
M.V. Marchenko ◽  
◽  
...  
Keyword(s):  
Plant Density ◽  
Morphological Characteristics ◽  
Planting Dates ◽  
Maize Hybrid ◽  
Maize Hybrids ◽  
Early Planting ◽  
Grain Productivity ◽  
Early Ripening ◽  
Northern Zone ◽  
Maturity Groups

Research tasks include identifying the optimal planting dates, plant density, establishing morphological characteristics and yield of maize hybrids of different maturity groups. Studies were conducted in the northern zone of the Krasnodar Territory. On average for two years, the yields of early ripening and mid-early hybrids were 6.15 and 7.58 t/ha, respectively (early planting dates, plant density - 80 thousand per hectare). However, the maximum grain productivity (6.48 t/ha) showed late-ripening maize hybrid when planting lately at density of 50 thousand per hectare.

scholarly journals Impact of Row Spacing and Planting Date on the Canopy Environment, Abundance of Lesser Cornstalk Borer and Other Arthropods, and Incidence of Aflatoxigenic Fungi in Peanuts

1997 ◽  
Vol 24 (1) ◽  
pp. 52-59
Author(s):  
S. D. Stewart ◽  
K. L. Boweri ◽  
T. P. Mack ◽  
J. H. Edwards
Keyword(s):  
Climatic Conditions ◽  
Planting Date ◽  
Row Spacing ◽  
Planting Dates ◽  
Canopy Development ◽  
Late Planting ◽  
Elasmopalpus Lignosellus ◽  
Soil Temperatures ◽  
Lepidoptera Pyralidae ◽  
Wide Row Spacing

Abstract Three row spacings and two planting dates for peanuts, Arachis hypogaea L., were examined in 1993 and 1994 to determine the influence of the canopy environment on lesser cornstalk borer, Elasmopalpus lignosellus (Zeller) (Lepidoptera: Pyralidae), other arthropods, and alflatoxigenic fungi. Climatically, 1993 and 1994 were disparate years. Decreasing row spacing increased relative leaf area and light interception by the canopy but, compared to difference between planting dates or years, had a relatively small impact on soil temperatures and relative humidity within the canopy. Late planting produced smaller plants, retarded canopy development, and reduced yield in both years, but especially in 1993 when it was hot and dry. The wide row spacing did not yield as well as twin and normal row spacings in either year. Lesser cornstalk borer damage and aflatoxin concentration were higher in the late planting than in the early planting of 1993, but were unaffected by row spacing. Fewer predatory arthropods were caught as row spacing decreased in both beat and pitfall samples, but planting date had variable effects. Prevailing climatic conditions and planting date appeared to be more important in influencing the canopy environment and pest densities than was row spacing.

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