Phenology and reproductive biology of cultivated species are important for the comprehension of the requirements for fruit and seed production and the management of pollinators. This study aimed to characterise the phenology, reproductive biology and growing degree days of the grapevine 'Isabel' (Vitis labrusca) in northeastern Brazil during January 2011 (P1), Augst 2011 (P2), April 2012 (P3) a...

Leaf Area of Index (LAI) refers to half the total leaf area all crops per unit area. It is an important index represent photosynthetic capacity and biomass crops. To obtain LAI conditions summer maize in different growth stages quickly accurately, further guiding field fertilization irrigation. The Unmanned aerial vehicles (UAV) multispectral data, growing degree days, canopy height model 2020-...

Root parasitic weeds are a major limiting production factor in a number of crops, and control is difficult. Genetic resistance and chemical control lead the fight, but without unequivocal success. Models that help to describe and even predict the evolution of parasitism underground are a valuable tool for herbicide applications, and even could help in breeding programs. Legumes are heavily affe...

Abstract Native Cirsium species play an important role in landscapes across North America. Hadroplontus litura (F.) (formerly Ceutorhynchus ), the stem-mining weevil and biological control agent of Canada thistle [ arvense (L.) Scop.] can complete its life cycle on five native to upper Midwest. Although these are within fundamental host range H. , as determined by host-range tests, we wanted ex...

The impact of altitude on the different sugars and acids feijoa fruit is unknown. For that reason, objective this study was to evaluate altitudinal effect content organic (citric malic) (glucose, fructose, sucrose) during development fruits. took place in towns Tenjo (2,580 m asl with 12.3°C, 76.4% RH, 190mm precipitation) San Francisco de Sales (1,800 asl, 18.5°C; 86.1% 573 mm precipitation), ...

The thermal environment of a crop is one the prime factors enhancing growth and production by regulating its physiological processes at different phenophases. To study impact regime on spring–summer-grown black gram (variety Pant Urd 31), an experiment was conducted with sowing dates (from first to third week March), soil application cobalt (Co) foliar sprays potassium (K) boron (B) in various ...

poa genus has a high value for grazing and forage conservation concerning thelivestock. in order to study the impacts of cold temperature and growing degree days(gdd) on seedling morphological trait and phonological development of two speciesinvolving poa pratensis and poa trivialis, this research was conducted in laboratory andgreenhouse and outdoor of research institute of forest and rangelan...

This study addresses relationships between leaf phenology, xylogenesis, and functional xylem anatomy in two ring-porous oak species, the temperate Quercus robur and the sub-Mediterranean Q. pyrenaica. Earlywood vessel (EV) formation and leaf phenology were monitored in 2012 and 2013. Ten individuals per species were sampled at each of three sites located in NW Iberian Peninsula. EV areas measur...

Broomrapes (Phelipanche spp. and Orobanche spp.) are holoparasitic plants that cause tremendous losses of agricultural crops worldwide. Broomrape control is extremely difficult and only amino acid biosynthesis-inhibiting herbicides present an acceptable control level. It is expected that broomrape resistance to these herbicides is not long in coming. Our objective was to develop a broomrape con...

This study was carried out under field conditions in Adana, Turkey 2018 and 2019 to determine the critical period for weed control sunflower depending on daily growth temperature (GDD) species. A log-logistic model with four parameters used relationship between relative crop yield both increased intervention time length of weed-free periods. In addition, dominant weeds densities were determined...