A field experiment was conducted during Kharif 2022 at Crop Research Farm, Department of Agronomy, Sam Higginbottom University Agriculture, Technology And Sciences, Prayagraj (U.P). To determine the “Influence phosphorus and sulphur on growth yield sunflower (Helianthus annuus L.)”, The results showed that treatment 9 [Phosphorus (60 kg/ha) + Sulphur 25 kg/ha] recorded significantly higher plan...

The spatial arrangement of plants in a landscape influences wind flow, but the extent that differences in the density of conspecifics and the height of surrounding vegetation influence population spread rates of wind dispersed plants is unknown. Wind speeds were measured at the capitulum level in conspecific arrays of different sizes and densities in high and low surrounding vegetation to deter...

BACKGROUND Global warming and shifted precipitation regimes increasingly affect species abundances and distributions worldwide. Despite a large literature on species' physiological, phenological, growth, and reproductive responses to such climate change, dispersal is rarely examined. Our study aims to test whether the dispersal ability of a non-native, wind-dispersed plant species is affected b...

The effect of pre and post-anthesis shading (20% of incident radiation) on pericarp development, cotyledon cell number and seed growth dynamic of fruits from three positions in the capitulum (peripheral, mid and central) of two sunflower (Helianthus annuus L.) genotypes were studied at two locations. Both shading treatments reduced pericarp weight, fruit volume and total yield per plant. Plants...

Lychnophora pseudovillosissima, a new species from the State of Minas Gerais, Brazil, is here described and illustrated. The unique because combination petiolate linear leaves with revolute margins, reticulodromous venation, 3–5 florets per capitulum. compared to morphologically similar species, L. villosissima, resembling in habit, leaves, number capitulum, but differing by shape size leaf pet...

BACKGROUND AND AIMS The reproductive biology of Syngonanthus mucugensis and S. curralensis (Eriocaulaceae) was studied in areas of 'campo rupestre' vegetation in the Chapada Diamantina, north-eastern Brazil. These species are herbaceous and the individuals have a grouped distribution. Their leaves are united in a rosette, and their inflorescence is monoecious, of the capitulum type. The stamina...

Plant height of sunflower is a major agronomic trait affecting crop performance in the field and its adaptation to mechanical harvest. Field experiments were conducted to study the effect of foliar application of paclobutrazol (PBZ) at 12.5 g ai/ha, mepiquat chloride (MPC) at 25.0 g ai/ha and chlormequat chloride (CCC) at 1,500 g ai/ha in single or double applications on sunflower plant mor...

The present research was intended for interspecific hybridization between two male sterile African marigold lines and six self-lines of French marigolds. results show that as indicated by the full seed number per capitulum, pollen amount influenced authentic compatibilities reckoned 10 cross combinations configured to some amount. Based on field performance these hybrids, it is known parental m...