E-mail: -

Institución: Universidad Autónoma Chapingo, Departamento de Fitotecnia.

País: México

Articles published in this journal

A diagnosis of land degradation in Oaxaca: the case of the Yute Ndaa, Ñuu Ndeku, Ñuu Savi Watershed

MORPHOLOGICAL VARIABLES SELECTION FOR THE CHARACTERIZATION OF HAWTHORN (Crataegus spp.)

E-mail: rnietoa@hotmail.com

Institución: Universidad Autónoma Chapingo, Departamento de Fitotecnia.

País: México

Articles published in this journal

Microencapsulation of grape seed oil by spray drying using whey protein and hawthorn pectin

POSTHARVEST QUALITY IN FRUIT OF HYDROPONIC TOMATO CULTIVATED WITH WASTEWATER AND WELL WATER

SOURCES OF ODOR ATTRACTIVE TO Conotrachelus crataegi Walsh (Coleoptera: Curculionidae) AND ITS PREFERENCE TO OVIPOSIT ON Crataegus spp. (Rosaceae: Maloideae)

PLUM POX VIRUS (SHARKA) IN STONE FRUIT THREES

CLONAL PROPAGATION OF HAWTHORN (Crataegus spp.) BY ROOT CUTTINGS

PLUM POX VIRUS: A POTENTIAL QUARANTINE PEST OF MEXICO

PHYSIOLOGICAL AND MORPHOLOGICAL RELATIONSHIPS IN FRUIT TREE GRAFTS ON HAWTHORN (Crataegus spp.) AS ROOTSTOCK

VARIATION IN STEM XYLEM ANATOMY OF TOMATO CULTIVARS GRAFTED ONTO A LOCAL RACE

CHEMICAL FRUIT THINNING OF APPLE (Malus domestica Borkh.) ‘STARKRIMSON’ AND ‘GOLDEN SPUR’ IN HIGH DENSITY PLANTINGS

CHEMICAL AND HAND THINNING OF FRUIT AND INTERACTION WITH TREE VIGOR OF ‘ROYAL GALA’ APPLE (Malus domestica Borkh.)

IMPORTANT UNITS OF MEASURE, SYMBOLS AND TERMS USED IN PLANT PHYSIOLOGY

BLACK FLESH IN HADEN MANGO FRUITS DURING POSTHARVEST

NUMERICAL TAXONOMY DENDROGRAM CONSTRUCTION USING THE DISTANCE COEFFICIENT c2: A REVIEW

MORPHOLOGICAL VARIATION OF CHERIMOYA LEAVES

EVALUATION OF SUBSTRATES AND VARIETYS IN PROTECTED PRODUCTION OF TOMATO

GENETIC VARIABILITY ACCORDING TO RAPD’s OF GUAVA ‘MEDIA CHINA’ TREES FROM FOUR PLANTATIONS AND MORPHOLOGICAL RESPONSE TO LOW AVAILABILITY OF NUTRIMENTS

MORPHOLOGICAL CHARACTERIZATION OF 40 NOPAL CULTIVARS USED AS A VEGETABLE AT THE GERMPLASM BANK OF THE CRUCEN-UACh

MORPHOLOGICAL VARIABLES SELECTION FOR THE CHARACTERIZATION OF HAWTHORN (Crataegus spp.)

DISTRIBUTION AND ECO-CLIMATIC CHARACTERIZATION FOR GENUS Crataegus L. (Rosaceae, SUBFAM. Maloideae) IN MEXICO

E-mail: abarrient@taurus.chapingo.mx

Institución: Universidad Autónoma Chapingo, Departamento de Fitotecnia.

País: México

Articles published in this journal

CIE L*a*b* polygon for quantifying scab (Sphaceloma perseae) in avocado fruit images

Relationships between stomatal and gas exchange characteristics of the leaf blade in ‘Colín V-33’ avocado seedlings

Relationship of rootstock xylem anatomy with the initial growth of ‘Tahiti’ lime (Citrus x latifolia Tanaka ex Q. Jiménez)

Effect of preharvest calcium spraying on ripening and chilling injury in ‘Hass’ (Persea americana Mill.) avocado

Pregerminative treatments and growth evaluation of seedlings of sweet granadilla (Passiflora ligularis)

Avocado plants ‘Hass’ under drought

Avocado fruit anatomy, ¿drupe or Berry?

Rooting cuttings of red raspberry (Rubus idaeus), cv. Heritaga by means of the use of kiba

Correlations between cv. Colin V-33 seedlings characteristics and its dwarfing effects as rootstoks

VARIATION IN THE TRANSPIRATION RATE OF ‘COLINMEX’ AVOCADO USING INTERSTOCKS UNDER TWO SOIL MOISTURE REGIMES

FOLIAR SPRAYS OF CALCIUM NITRATE, EFFECT IN THE MINERAL CONTENT OF LEAF AND MESOCARP IN CV. HASS AVOCADO (Persea americana Mill.)..

GENETIC VARIABILITY OF THE AVOCADO GERMPLASM BANKS PRESERVED IN THE STATE OF MEXICO

AVOCADO (Persea Americana MilI.) POLLINATORS IN ITS REGION OF ORIGIN

INFLUENCE OF 'COLÍN V-33' INTERSTOCK ON SOME PHYSIOLOGICAL ASPECTS IN AVOCADO (Persea Americana MilI.)

SCION-INTERSTOCK RELATIONSHIPS AND ANATOMICAL AND PHYSIOLOGICAL LEAF CHARACTERISTICS OF FOUR AVOCADO GENOTYPES

VARIATION IN STEM XYLEM ANATOMY OF TOMATO CULTIVARS GRAFTED ONTO A LOCAL RACE

IMPORTANT UNITS OF MEASURE, SYMBOLS AND TERMS USED IN PLANT PHYSIOLOGY

NUMERICAL TAXONOMY DENDROGRAM CONSTRUCTION USING THE DISTANCE COEFFICIENT c2: A REVIEW

MORPHOLOGICAL VARIATION OF CHERIMOYA LEAVES

GENETIC VARIABILITY ACCORDING TO RAPD’s OF GUAVA ‘MEDIA CHINA’ TREES FROM FOUR PLANTATIONS AND MORPHOLOGICAL RESPONSE TO LOW AVAILABILITY OF NUTRIMENTS

COLDSTORAGE AND MODIFIED ATMOSPHERES IN MINIMALLY PROCESSED AVOCADO

CALCIUM NITRATE FOLIAR SPRAYS IN THE RIPENING AND CHILLING INJURY OF ‘FUERTE’ AVOCADO

DEHYDRATION METHODS ON COMMERCIAL QUALITY OF ROSE

MORPHOLOGICAL CHARACTERIZATION OF 40 NOPAL CULTIVARS USED AS A VEGETABLE AT THE GERMPLASM BANK OF THE CRUCEN-UACh

ETHYLENE IN THE FRUIT ABSCISSION OF THREE SPECIES OF THE GENUS Opuntia

CALCIUM SPRAYING ON NUTRIENT CONCENRATION OF LEAF, SKIN, AND FRUIT IN ‘HASS’ AVOCADO

NUTRIMENTAL STANDARDS FOR ‘HASS’ AVOCADO

MORPHOLOGICAL VARIABLES SELECTION FOR THE CHARACTERIZATION OF HAWTHORN (Crataegus spp.)

DISTRIBUTION AND ECO-CLIMATIC CHARACTERIZATION FOR GENUS Crataegus L. (Rosaceae, SUBFAM. Maloideae) IN MEXICO

E-mail: jrodriguezpe@chapingo.mx

Institución: Universidad Autónoma Chapingo, Departamento de Fitotecnia.

País: México

Articles published in this journal

Molecular markers of pathogen resistance for assisted breeding of tomato (Solanum lycopersicum L.)

Genetic parameters of an interspecific cross between S. lycopersicum L. and S. habrochaites Knapp & Spooner

Growth and sugar content of potato tubers in four maturity stages under greenhouse conditions

Prediction of fruit yield and firmness of tomato hybrids with BLUP and RR-BLUP using ISSR molecular mark

Morphological and molecular variation in 55 native tomato collections from Mexico

Efecto de la temperatura de almacenamiento en la actividad enzimática y capacidad antioxidante en brotes de Salvia officinalis L.

Growth, yield and sugar content of potato tubers at different physiological ages

BROCCOLI JUICE IN THE INHIBITION OF Alternaria alternata IN MINIMALLY PROCESSED ARUGULA. POSTHARVEST QUALITY

Basil ‘Nufar’ (Ocimum basilicum L.) post-harvest quality under refrigeration

Tolerance of 26 native tomato collections from Mexico to nematode Meloidogyne incognita (KOFOID AND WHITE) Chitwood

Intervarietal heterosis in saladette tomato (Solanum lycopersicum  L.)

Macronutrient extraction in pepper ‘chile de agua’ (Capsicum annuum  L.)

Changes in post-harvest quality of peppermint (Mentha x piperita L.) under refrigeration

Behavior of advanced lines of tomato (Solanum lycopersicum L.) to phytopathogens at Chapingo, Mexico

GENETIC EROSION IN SINGLE-CROSS PROGENITORS OF A SYNTHETIC VARIETY

ETIOLOGY AND CONTROL OF FLOWER NECROSIS AND FRUIT ROT IN CUCUMBER IN MORELOS, MEXICO

EARLY SELECTION IN MATERNAL HALF-SIB FAMILIES OF HUSK TOMATO OF PUEBLA RACE

DRY AND WET HANDLING AND STORAGE OF FOUR CUT ROSE CULTIVARS

POSTHARVEST CONSERVATION OF HUSK TOMATO (Physalis ixocarpa Brot. Ex. Horm.) WITH AND WITHOUT CALYX

PRUNING AND PLANT DENSITY IN THREE VARIETIES OF HUSK TOMATO (Physalis ixocarpa Brot. ex Horm.) GROWN UNDER GREENHOUSE CONDITIONS

EVALUATION OF PRUNING IN TWO HUSK TOMATO (Physalis ixocarpa Brot. ex Horm.) VARIETIES CULTIVATED IN FIELD

INBREEDING OF SYNTHETIC VARIETIES DERIVED FROM LINES AND SINGLE CROSSES

RELATIONSHIP BETWEEN THE PHYSIOLOGICAL QUALITY TESTS OF TOMATO (Solanum lycopersicum L.) SEEDS AND THE EMERGENCE IN SEEDBEDS

PACLOBUTRAZOL, UNICONAZOLE AND CYCOCEL IN POTATO SEED-TUBER PRODUCTION IN HYDROPONIC CULTURE

FOLIAR APPLICATION OF GLUTAMIC ACID TO TOMATO PLANTS (Lycopersicon esculentum Mill.)

POTATO DEVELOPMENT AND YIELD IN RESPONSE TO SOWING IMMATURE TUBER-SEED

Bell pepper varieties with early pruning of terminal buds under two population densties

Collection and morphological characterization of ‘water chilli’ pepper (Capsicum annuum L.) in Oaxaca, Mexico

RESISTANCE TO Fusarium sp. IN 95 ACCESSIONS OF HUSK TOMATO (Physalis spp.)

INFLUENCE OF 'COLÍN V-33' INTERSTOCK ON SOME PHYSIOLOGICAL ASPECTS IN AVOCADO (Persea Americana MilI.)

INTERVARIETAL HETEROSIS IN INDETERMINATE SALADETTE TOMATO

VARIATION IN STEM XYLEM ANATOMY OF TOMATO CULTIVARS GRAFTED ONTO A LOCAL RACE

POPULATION DENSITY IN HYDROPONICS CULTURE FOR POTATO TUBER-SEED PRODUCTION (Solanum tuberosum L.)

EFFECT OF SOLAR RADIATION IN THE PRODUCTION OF SEED POTATO IN SOILLESS CULTIVATION

FLOWERING, YIELD AND SEED QUALITY IN POTATO GENOTYPES

RESPONSE OF Chamaedorea elegans Mart. TO PREGERMINATION TREATMENTS

NUMERICAL TAXONOMY DENDROGRAM CONSTRUCTION USING THE DISTANCE COEFFICIENT c2: A REVIEW

OSMOTIC CONDITIONING OF POTATO (Solanum tuberosum L.) SEED WHITH SALINE SOLUTIONS

YIELD PERFORMANCE OF TOMATO HYBRIDS AND THEIR F2 GENERATIONS

GENOTYPES OR VARIETIES EVALUATED ACROSS YEARS AND SITES. CROSSED vs NESTED FACTORS

BEHAVIOR OF BIOMASS ACCUMULATION AND DISTRIBUTION IN POTATO GENOTYPES ESTABLISHED UNDER RAINFED CONDITIONS

In vitro PROPAGATION OF PAPA RATONA (Oxalis tuberosa Mol)

OSMOSTIC CONDITIONING IN Brassica oleracea L. SEEDS

MORPHOLOGICAL VARIABLES SELECTION FOR THE CHARACTERIZATION OF HAWTHORN (Crataegus spp.)

COMMON PROBLEMS AND METHODS OF THE ANALYSIS OF FACTORIAL EXPERIMENTS

E-mail: mtcolina@taurus1.chapingo.mx

Institución: Universidad Autónoma Chapingo, Departamento de Fitotecnia.

País: México

Articles published in this journal

Genetic diversity of sun poinsettia (Euphorbia spp.) in Morelos, Mexico, with RAPD molecular markers

Growth and sugar content of potato tubers in four maturity stages under greenhouse conditions

Effect of plant row arrangement on yield components of bell pepper

Evaluation of different ethylene inhibitors in postharvest life of rose (Rosa sp L.)

Post-harvest use of chemical compounds in tuberosa (Polianthes tuberosa Lin.) stems to increase vase-life

Actual situation of ornamental postharvest management

Growth, yield and sugar content of potato tubers at different physiological ages

Preservation solutions ad enzyme profile in postharvest of calla lilies (Zantedeschia aethiopica L. Spreng)

BROCCOLI JUICE IN THE INHIBITION OF Alternaria alternata IN MINIMALLY PROCESSED ARUGULA. POSTHARVEST QUALITY

Basil ‘Nufar’ (Ocimum basilicum L.) post-harvest quality under refrigeration

Changes in post-harvest quality of peppermint (Mentha x piperita L.) under refrigeration

POSTHARVEST PHYSIOLOGY OF BASIL (Occimum basilicum L.) WITH AND WITHOUT MULCHING

DRY AND WET HANDLING AND STORAGE OF FOUR CUT ROSE CULTIVARS

POSTHARVEST CONSERVATION OF HUSK TOMATO (Physalis ixocarpa Brot. Ex. Horm.) WITH AND WITHOUT CALYX

COBALT AS SENESCENCE RETARDANT IN POSTHARVEST OF ORIENTAL HYBRID Lilium

BIOMASS DISTRIBUTION AND LEAD ACCUMULATION IN SQUASH (Cucurbita pepo L.) GROWN IN CONTAMINATED SOIL

EVALUATION OF SEVEN NATIVE TOMATO (Lycopersicon esculentum Mill.) GENOTYPES OF AGRONOMIC INTEREST GROWN HYDROPONICALLY

CACTUS PEAR (Opuntia albicarpa and O. megacantha) PRODUCTION SYSTEM IN AXAPUSCO, ESTADO DE MEXICO. PROBLEMS AND ALTERNATIVES

PACLOBUTRAZOL, UNICONAZOLE AND CYCOCEL IN POTATO SEED-TUBER PRODUCTION IN HYDROPONIC CULTURE

IN VITRO PROPAGATION OF Brassia verrucosa (BATEMAN EX LINDL.) ORCHID

FOLIAR APPLICATION OF GLUTAMIC ACID TO TOMATO PLANTS (Lycopersicon esculentum Mill.)

POTATO DEVELOPMENT AND YIELD IN RESPONSE TO SOWING IMMATURE TUBER-SEED

Agronomic and physiotecnical evaluation of four production systems in two tomato hybrids

POSTHARVEST MANAGEMENT OF HUSK TOMATO (Physalis ixocarpa Brot.): Effect of Harvest Time and Packing

ROOT APPLICATION OF CARBON DIOXIDE IN HUSK TOMATE (Physalis ixocarpa Brot.)

SEASONAL CARBOHYDRATE VARIATION IN LEAVES AND INFLORESCENCES OF THE AVOCADO (Persea Americana Mill.)

DILUTION OF A STANDARD NUTRIENT SOLUTION IN THE CULTIVATION OF CHRYSANTHEMUM (Dendranthema x grandiflorum) IN A HIDROPONIC OPEN SYSTEM

INFLUENCE OF SHADE ON VEGETATIVE AND REPRODUCTIVE BEHAVIOUR OF APPLE PEPPER (Capsicum pubescens Ruiz, López and Pavón)

WAX AND CEPA APPLICATIONS ON FRUITS OF SAPODILLA (Manilkara sapota L.)

INTERACTION OF PERSIAN LIME-ROOTSTOCKS. EFFECT ON LEAF STOMATA CHARACTERISTICS AND TREE VIGOUR

COLLECTION, CHARACTERIZATION AND GROUPING OF PARTHENOCARPIC GENOTYPES OF ROUND ZUCCHINI PUMPKIN (Cucurbita pepo L.)

SCION-INTERSTOCK RELATIONSHIPS AND ANATOMICAL AND PHYSIOLOGICAL LEAF CHARACTERISTICS OF FOUR AVOCADO GENOTYPES

Mechanical and physiological behavior of mamey zapote fruits [Pouteria sapota (Jacq.) H. E. Moore & Stearn] under compression

NUTRITIENT VALUE AND SAPONIN CONTENT OF HUAUZONTLE (Chenopodium nuttalliae Saff.), ZUCCHINI (Cucurbita pepo L.), CANOLA (Brassica napus L.) AND AMARANTO (Amaranthus leucocarpus S. Watson syn. hypochondriacus L

POPULATION DENSITY IN HYDROPONICS CULTURE FOR POTATO TUBER-SEED PRODUCTION (Solanum tuberosum L.)

ANATOMICAL DIFFERENCES AND USE OF PULSE SOLUTIONS IN TWO ROSE (Rosa sp.) CULTIVARS

EVALUATION OF QUALITY IN FRUITS OF SEVEN NATIVE TOMATO (Lycopersicon esculentum var. cerasiforme) GENOTYPES

EFFECT OF SOLAR RADIATION IN THE PRODUCTION OF SEED POTATO IN SOILLESS CULTIVATION

SUBSTRATES AND ARBUSCULAR MYCORRHIZAL FUNGI IN THE PRODUCTION OF POINSETTIA

MATHEMATICAL MODELS FOR ESTIMATING FRUIT GROWTH IN APPLE PEPPER (Capsicum pubescens R and P)

ANTISENESCENCE ENZYMATIC SYSTEM, CATALASE-SUPEROXIDE DISMUTASE, IN PITAHAYA (Hylocereus undatus) FRUITS STORED AT LOW TEMPERATURES

PRODUCTION OF CYCLAMEN (Cyclamen persicum Mill.) SEEDLINGS IN COCONUT COIR DUST BASED SUBSTRATES

In vitro PROPAGATION OF Oncidium stramineum Lindl., AN ENDANGERED ENDEMIC MEXICAN ORCHID

MECHANICAL PROPERTIES OF PAPAYA FRUITS ‘MARADOL ROJA’ UNDER STATIC COMPRESSION

STORAGE TEMPERATURES AND MATURATION OF SAPOTE MAMEY FRUITS (Pouteria sapota (Jacq.) H.E. Moore & Stearn)

PLASTIC FILMS IN SIX ORNAMENTAL SPECIES IN BOUQUET: CHANGES IN APPEARANCE, FRESH WEIGHT AND ETHYLENE PRODUCTION

PHYSIOLOGICAL, BIOCHEMICAL AND QUALITY FACTORS IN SAPOTE MAMEY (Pouteria sapota Jacq. H.E. Moore & Stearn) FRUITS DURING POSTHARVEST

ANATOMICAL CHANGES IN Vitis vinifera LEAVES PRODUCED in vitro

APPLICATION OF CO2 TO SOIL, USE OF PLASTIC MULCHES, AND MANAGEMENT SYSTEMS FOR HUSK TOMATOES (Physalis ixocarpa Brot.)

MORPHOLOGICAL CHANGES IN DAHLIA (Dahlia pinnata Cav.) PLANTS TREATED WITH PACLOBUTRAZOL

FERTILIZATION AND POSTHARVEST QUALITY OF PEACH (Prunus persica L. Batsch) UNDER COLD STORAGE

GROWTH AND NUTRITION OF MEXICAN YELLOW IRIS (Iris pseudacorus, L.)

FRUIT QUALITY IN PEACH ‘DIAMANTE’ AND AND ‘CP-88-8’ INTERSPERSED IN MAIZE AND BEAN

PRELIMINARY ANALYSIS OF CAROTENOIDS AND PHENOLIC COMPOUNDS IN SAPOTE MAMEY [Pouteria sapota (Jacq.) H.E. Moore & Stearn] FRUIT

COLDSTORAGE AND MODIFIED ATMOSPHERES IN MINIMALLY PROCESSED AVOCADO

CALCIUM NITRATE FOLIAR SPRAYS IN THE RIPENING AND CHILLING INJURY OF ‘FUERTE’ AVOCADO

BEHAVIOR OF BIOMASS ACCUMULATION AND DISTRIBUTION IN POTATO GENOTYPES ESTABLISHED UNDER RAINFED CONDITIONS

CHARACTERIZATION OF CAIMITO FRUITS (Chrysophyllum cainito L.) AT THE MEXICAN STATE OF MORELOS

MORPHOMETRIC CHARACTERIZATION OF NANCHE (Byrsonima crassifolia (L.) H.B.K.) FRUIT AND SEEDS

CONSERVATION OF ALSTROEMERIA (Alstroemeria spp.) FLOWERS BY MEANS OF PRESERVATIVE SOLUTIONS AT POSTHARVEST

FOLIAR FERTILIZATION WITH SILICIO AS AN ALTERNATIVE AGAINST WILTING CAUSED BY Fusarium oxysporum (SHELD) IN HUSK TOMATE

EFFICIENCY INDEXES OF POTATO GENOTYPES ESTABLISHED UNDER RAINFED CONDITIONS

OXIDATIVE STRESS SYSTEM, PHENOLS-POLIPHENOL OXIDASE-PEROXIDASE, IN PITAHAYA (Hylocereus undatus) FRUITS STORED UNDER LOW TEMPERATURES

CALCIUM SPRAYING ON NUTRIENT CONCENRATION OF LEAF, SKIN, AND FRUIT IN ‘HASS’ AVOCADO

EFLUENTS AND SUBSTRATES ON POINSETTIA DEVELOPMENT

MORPHOLOGICAL VARIABLES SELECTION FOR THE CHARACTERIZATION OF HAWTHORN (Crataegus spp.)

CHARACTERIZATION OF SAPOTE MAMEY FRUITS (Pouteria sapota), IN THE SOUTHWEST REGION OF MORELOS

Institución: Universidad Popular Autónoma del Estado de Puebla

País: México

Articles published in this journal

Ornamental value and observations on seed production of Agave potatorum Zucc.

Some characteristics of Tigrida pavonia Ker. Gawl.

Estudio etnohortícola de las plantas ornamentales de una zona rural de la Sierra Norte de Puebla.

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Grape behaviour in one plantation of Zacatecas. VII. Estimation of shoot's leaf area.

Grape behaviour in one plantation of Zacatecas.VI plants variability

CLONAL PROPAGATION OF HAWTHORN (Crataegus spp.) BY ROOT CUTTINGS

OBSERVATIONS ON FLOWERING IN Sprekelia formosissima (L.) Herbert.

PHYSIOLOGICAL AND MORPHOLOGICAL RELATIONSHIPS IN FRUIT TREE GRAFTS ON HAWTHORN (Crataegus spp.) AS ROOTSTOCK

INCREMENTO ANUAL EN TAMAÑO DE BULBOS DE Tigridia huajuapanensis Molseed ex Cruden

CONTINUITY OF ROOTS EMERGENCE AND GROWTH IN Tigridia pavonia Ker. Gawl.

Bryophyllum pinnatum Kurz. – A NEW CUT FLOWER SPECIES. I. AESTHETIC VALUE

Bryophyllum pinnatum Kurz. – A NEW CUT FLOWER SPECIES. II. VASE LIFE.

RELATIONS BETWEEN THORNS AND SHOOTING OF VEGETATIVE AND FLOWER BUDS IN Crataegus pubescens</em (H.B.K.) Steud.

ROOTS ATTRIBUTES OF MEXICAN Crataegus spp. TREES

MORPHOLOGICAL VARIABLES SELECTION FOR THE CHARACTERIZATION OF HAWTHORN (Crataegus spp.)

Institución: Universidad de León

País: México

Articles published in this journal

MORPHOLOGICAL VARIATION OF CHERIMOYA LEAVES

MORPHOLOGICAL VARIABLES SELECTION FOR THE CHARACTERIZATION OF HAWTHORN (Crataegus spp.)

DISTRIBUTION AND ECO-CLIMATIC CHARACTERIZATION FOR GENUS Crataegus L. (Rosaceae, SUBFAM. Maloideae) IN MEXICO