Effects of iprodione and vinclozolin seed treatments on germination, emergence and plant growth in onion

1985 ◽  
Vol 25 (2) ◽  
pp. 465
Author(s):  
T Wicks ◽  
B Philp
Keyword(s):  
Plant Growth ◽  
Seedling Growth ◽  
Filter Paper ◽  
Seed Treatments ◽  
Treated Seed ◽  
Field Emergence ◽  
Growth Of Seedlings

Iprodione or vinclozolin dusted on White Spanish and Goldberg onions, at 100g a.i./kg of seed, reduced germination by at least 40% and severely stunted the growth of seedlings nated on moistened filter paper. Similar rates of vinclozolin severely reduced field emergence and retarded the growth of White Spanish and Goldberg seedlings whereas the same rate of iprodione reduced field emergence and growth of Goldberg, but not White Spanish. Poor field emergence of treated seed could have been a germi consequence of inhibition of germination, stunted seedling growth or a combination of both factors.

Effect of pre-sowing seed treatments on field emergence and seedling growth of palmyrah (Borassus flabellifer L.)

2018 ◽  
Vol 25 (1) ◽  
pp. 31-34
Author(s):  
Poomaruthai Masilamani ◽  
◽  
Velanganni Alex Albert ◽  
S. Vallal Kannan ◽  
Marimuthu Govindaraj ◽  
...  
Keyword(s):  
Seedling Growth ◽  
Cow Dung ◽  
Seedling Height ◽  
Seed Treatments ◽  
Number Of Leaves ◽  
Field Emergence ◽  
Sowing Seed

Studies were carried to find the effect of pre - sowing seed treatments on field emergence and seedling growth of palmyrah. The seeds were subjected to water soaking for 24 hours, soaking in 1% and 2% of cow dung solution, KNO3, H2O2 and CaOCl2 for 24 hours and dry seeds served as control. 120 days after sowing the observations were made on days taken for initial emergence, field emergence (%) and 210 days after sowing the observations were made on field emergence (%), seedling height (cm) and number of leaves per seedling. The results revealed that seeds soaked in 1% cow dung solution for 24 hrs took 102 days for initial emergence followed by seeds soaked in 1% CaOCl2 for 24 hrs (103 days), 210 days after sowing the seeds soaked in 1% CaOCl2 for 24 hrs. recorded the highest field emergence of 56 % and more number of leaves/seedling (2.1) when compared to control. It is recommended that palmyrah seeds soaked in 1% CaOCl2 for 24 hrs enhance the germination, field emergence and seedling growth.

scholarly journals Seed germination studies of tree species: Radermarchera xylocarpa and Dolicandrone falcata

2016 ◽  
Vol 51 (1) ◽  
pp. 41-46
Author(s):  
DR Trivedi ◽  
AG Joshi ◽  
PS Nagar
Keyword(s):  
Seed Germination ◽  
Seedling Growth ◽  
Filter Paper ◽  
Tree Species ◽  
Basal Medium ◽  
Distilled Water ◽  
Water Control ◽  
Percent Germination ◽  
Growth Of Seedlings

Seeds of Radermarchera xylocarpa and Dolicandrone falcata were soaked overnight in water and germinated in different substrates. In both the plants, the highest percent of germination was recorded in cocopeat (Radermarchera xylocarpa:62%; Dolicandrone. falcata: 41%) followed by MS basal medium (Radermarchera xylocarpa: 46%; Dolicandrone falcata:20%), cocopeat: sand (Radermarchera xylocarpa:30%; Dolicandrone. falcata: 8%) and least being in filter paper (Radermarchera xylocarpa: 23%; Dolicandrone falcata: 0%).Prior to germination in optimised substrate, seeds were soaked overnight in distilled water (control) and in gibberllic acid (GA3) (5 & 10 ?M). In both the plants GA3 treated seeds failed to increase percent germination and the growth of seedlings. In control the seedling growth was better with respect to all the parameter for both the species. Seedlings which were grown in cocopeat, rapidly developed into healthy plants after transfer to field Bangladesh J. Sci. Ind. Res. 51(1), 41-46, 2016

scholarly journals Phytotoxic Activity of Parthenium Against Wheat and Canola Differ With Plant Parts and Bioassays Techniques

2016 ◽  
Vol 34 (1) ◽  
pp. 11-24 ◽  
Author(s):  
A. KHALIQ ◽  
F ASLAM ◽  
A MATLOOB ◽  
A JAVAID ◽  
A TANVEER ◽  
...  
Keyword(s):  
Seedling Growth ◽  
Filter Paper ◽  
Leaf Extracts ◽  
Invasive Weed ◽  
Test Species ◽  
Chlorophyll Contents ◽  
Phenolic Contents ◽  
Plant Parts ◽  
Phytotoxic Activity ◽  
Whole Plant

Phytotoxic effects of invasive weed Parthenium hysterophorus were studied by using whole plant, leaf and root aqueous extracts at 0, 2.5, 5.0, 7.5 and 10% (w/v) concentrations against germination and early seedling growth of wheat and canola. Studies were carried out both in Petri plates with filter paper as substratum placed in controlled conditions and soil-filled plastic pots placed in open environments. Pronounced variation was noted for phytotoxic activity of different plant parts of parthenium, aqueous extract concentrations, test species, and bioassay techniques. Aqueous parthenium extracts either inhibited or delayed the germination and suppressed seedling growth of test species over control. For both test species, all the germination attributes were suppressed to a greater extent in Petri plates than in plastic pots. Leaf extracts were more suppressive to germination of test species than whole plant and root extracts. Increasing extract concentration beyond 2.5% caused significant reduction in seedling dry biomass of both test species. Aqueous parthenium extract diminished chlorophyll contents of wheat and canola by 32-63% and 29 69%, respectively. Nevertheless, an increase of 9-172% and 22-60% in phenolic contents of wheat and canola was recorded. Canola appeared to be more susceptible than wheat at all extract concentrations. Present study concluded that bioassays conducted under controlled condition using filter paper as substratum may be misleading due to over estimation of allelopathic response and variation in potential of receiver and donor species. Furthermore, it implies that threshold concentrations of allelochemicals for test species in Petri plates are rarely reached under field conditions.

scholarly journals Seed Treatment With Systemic Fungicides: Time for Review

2021 ◽  
Vol 12 ◽  
Author(s):  
Mulla S. Ayesha ◽  
Trichur S. Suryanarayanan ◽  
Karaba N. Nataraja ◽  
Siddegowda Rajendra Prasad ◽  
Ramanan Uma Shaanker
Keyword(s):  
Plant Growth ◽  
Seedling Growth ◽  
Growth And Development ◽  
Seed Treatment ◽  
Plant Diseases ◽  
Systemic Fungicide ◽  
Plant Growth And Development ◽  
Seedling Vigour ◽  
Systemic Fungicides ◽  
Seed Endophytes

Pre-sowing seed treatment with systemic fungicides is a firmly entrenched practice for most agricultural crops worldwide. The treatment is intended to protect the crop against seed- and soil-borne diseases. In recent years, there is increasing evidence that fungicidal applications to manage diseases might inadvertently also affect non-target organisms, such as endophytes. Endophytes are ubiquitously present in plants and contribute to plant growth and development besides offering resistance to biotic and abiotic stresses. In seeds, endophytes may play a role in seed development, seed germination, seedling establishment and crop performance. In this paper, we review the recent literature on non-target effects of fungicidal applications on endophytic fungal community and discuss the possible consequences of indiscriminate seed treatment with systemic fungicide on seed endophytes. It is now well recognized that endophytes are ubiquitously present in all parts of the plant, including the seeds. They may be transmitted vertically from seed to seed as in many grasses and/or acquired horizontally from the soil and the environment. Though the origins and evolution of these organisms in plants are a matter of conjecture, numerous studies have shown that they symbiotically aid in plant growth and development, in nutrient acquisition as well in protecting the plants from abiotic and biotic stresses. Against this background, it is reasonable to assume that the use of systemic fungicides in seed treatment may not only affect the seed endophytes but also their attendant benefits to seedling growth and establishment. While there is evidence to indicate that fungicidal applications to manage plant diseases also affect foliar endophytes, there are only few studies that have documented the effect of seed treatment on seed-borne endophytes. Some of the convincing examples of the latter come from studies on the effect of fungicide application on rye grass seed endophyte AR37. More recently, experiments have shown that removal of seed endophytes by treatment with systemic fungicides leads to significant loss of seedling vigour and that such losses could be partially restored by enriching the seedlings with the lost endophytes. Put together, these studies reinforce the importance of seed endophytes to seedling growth and establishment and draw attention on how to trade the balance between the benefits of seed treatments and the direct and indirect costs incurred due to loss of endophytes. Among several approaches, use of reduced-risk fungicides and identifying fungicide-resistant endophytes are suggested to sustain the endophyte contribution to early seedling growth.

scholarly journals Tolerance to Pre-Harvest Sprouting in Lithuanian Winter Wheat Advanced Lines

2009 ◽  
Vol 63 (1-2) ◽  
pp. 45-50
Author(s):  
Žilvinas Liatukas ◽  
Vytautas Ruzgas
Keyword(s):  
Plant Growth ◽  
Winter Wheat ◽  
Filter Paper ◽  
Experimental Period ◽  
Growth Chamber ◽  
Breeding Lines ◽  
Cumulative Index ◽  
Resistant Lines ◽  
Final Score ◽  
Plant Growth Chamber

Tolerance to Pre-Harvest Sprouting in Lithuanian Winter Wheat Advanced Lines Tolerance to pre-harvest sprouting of winter wheat advanced breeding lines was evaluated at the Lithuanian Institute of Agriculture in 2005 and 2006. The tests were conducted with intact ears germinated in plastic boxes on wet filter paper in a plant growth chamber. A total of 131 breeding lines were tested during the experimental period. The experiment revealed that sprouting cumulative index (SCI) characterises resistance of lines to pre-harvest sprouting more precisely than sprouting final score (SFS). The SFS ranged from 4.3 to 9.0 in 2005 and from 5.4 to 9.0 in 2006. The SCI value was 0.14-1.0 in both years. Lines in 2005 were more susceptible to pre-harvest sprouting than those in 2006. The most resistant were found to be the lines Flair/Asketis, Torfrida/Beaver//Tarso, Širvinta1/LIA3480, while the most susceptible ones were Elena/Flair, Mermaid/Alidos, Flair/Lut.96-3 in 2005. In 2006, the most resistant lines were Pegassos/Dream, Belisar/Briz, Lars/Lut.96-3 and the most susceptible were Rostovchanka/Lut.96-3, Rector/Briz, Rostovchanka/Flair. The SFS of resistant lines was up to score 6 and the SCI value reached 0.3 in both years. The SFS of susceptible lines was 9.0 and the SCI value more than 0.9 in both years.

Effect of Dormancy Breaking Treatments on Germination of Palmyrah (Borassus flabellifer L.)

2021 ◽  
Vol 43 (2) ◽  
pp. 114-118
Author(s):  
Poomaruthai Masilamani ◽  
◽  
Velanganni Alex Albert ◽  
Marimuthu Govindaraj ◽  
◽  
...  
Keyword(s):  
Field Performance ◽  
Cow Dung ◽  
Seedling Height ◽  
Dormancy Breaking ◽  
Seed Treatments ◽  
Field Emergence ◽  
Sowing Seed ◽  
And Control

Studies were carried to find out the effect of pre-sowing seed treatments to alleviate the dormancy of Palmyrah. A total of ten pre- sowing treatments viz., soaking in water for 24 h, soaking in 1% cow dung solution for 24 h and control (dry seeds) were given to fresh nuts of Palmyrah. At 4, 7, 12, 18 and 24 months after planting in the field, performance of seedlings were evaluated for field emergence, seedling height and the results revealed that seeds soaked in 1% cow dung solution followed by seeds soaked in 1% CaOCl2 (103 days). Seven months after sowing the seeds soaked in 1% CaOCl2 recorded the highest field emergence of 56% with high leave production per seedling (2.1) when compared to control. This study also confirms the effect of pre-sowing treatments on field emergence and frond production of Palmyrah nut which has dormancy.

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