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Articles 1 - 8 of 8
Full-Text Articles in Life Sciences
Evaluation Of The Aquacrop Model For Simulating Cotton Yield Under A Semi-Arid Environment And Different Field Management Practices, Ghorban Ghorbani Nasrabad, Meysam Abedinpour, Abotaleb Hazarjaribi
Evaluation Of The Aquacrop Model For Simulating Cotton Yield Under A Semi-Arid Environment And Different Field Management Practices, Ghorban Ghorbani Nasrabad, Meysam Abedinpour, Abotaleb Hazarjaribi
The Philippine Agricultural Scientist
Cotton plays an important role in increasing productivity in the agricultural sector and related industries in the province of Golestan, Iran. However, the cultivation areas decreased considerably in the last couple of decades due to the high costs of production, water scarcity, and climate change. To encourage sustainable increase in production, crop simulation models are parameterized for each region using observed field data. In this study, the AquaCrop model was calibrated and validated for cotton under different field management scenarios using data from a 3-yr field experiment, which was conducted at the research farm of the National Cotton Research Institute, …
Taxonomy Of Cassava (Manihot Esculenta Crantz) Mealybugs (Hemiptera: Pseudococcidae) - 1: Identification And Local Distribution Of The Predominant Species On Witches’ Broom-Diseased Plants In The Philippines, Ireneo L. Lit Jr., Cristian Lucañas, Joanne Langres, Lolita Dolores, Ruby Ana Laude, Merdelyn Caasi-Lit
Taxonomy Of Cassava (Manihot Esculenta Crantz) Mealybugs (Hemiptera: Pseudococcidae) - 1: Identification And Local Distribution Of The Predominant Species On Witches’ Broom-Diseased Plants In The Philippines, Ireneo L. Lit Jr., Cristian Lucañas, Joanne Langres, Lolita Dolores, Ruby Ana Laude, Merdelyn Caasi-Lit
The Philippine Agricultural Scientist
Samples of cassava (Manihot esculenta Crantz) plants infected with witches’ broom disease were gathered from 13 provinces in the Philippines. Mealybugs were observed to occur in nine out of the 13 cumulative samples. The most predominant among several mealybug species observed was identified as Pseudococcus jackbeardsleyi Gimpel and Miller. P. jackbeardsleyi is not yet known to transmit phytoplasma, especially the one causing cassava witches’ broom (CWB). However, its occurrence in almost 70% of the CWB-infected samples provides circumstantial evidence that it may be related to the spread of the pathogen. This formal report of identification is in support of the …
Feeding Behavior Of Sweet Potato Weevil, Cylas Formicarius (Fabricius) (Coleoptera: Brentidae) On Three Sweet Potato, Ipomoea Batatas L. Cultivars Grown In Tarlac, Philippines, Jerah Mystica Novenario, Flor Ceballo-Alcantara
Feeding Behavior Of Sweet Potato Weevil, Cylas Formicarius (Fabricius) (Coleoptera: Brentidae) On Three Sweet Potato, Ipomoea Batatas L. Cultivars Grown In Tarlac, Philippines, Jerah Mystica Novenario, Flor Ceballo-Alcantara
The Philippine Agricultural Scientist
Sweet potato is grown in tropical countries for its edible tubers, which have become an essential food source. It is usually propagated through vine-cutting, which can be obtained from harvested plants or nurseries intended for cutting production only. The recurrent use of vines may cause increased weevil infestation. The crop is known to be infested with insect pests. More importantly, the sweet potato weevil, Cylas formicarius, targets the tubers, thus, causing the economic losses. Sweet potato farmers in Tarlac claim that only one sweet potato cultivar is being attacked by C. formicarius, however, it was found in this experiment that …
Disease-Reducing Effect Of Calcium Salts Against Postharvest Diseases Of Mango (Mangifera Indica L. Cv. Carabao) Fruits, Melissa P. Montecalvo, Mary Joy C. Mendoza, Teresita U. Dalisay
Disease-Reducing Effect Of Calcium Salts Against Postharvest Diseases Of Mango (Mangifera Indica L. Cv. Carabao) Fruits, Melissa P. Montecalvo, Mary Joy C. Mendoza, Teresita U. Dalisay
The Philippine Agricultural Scientist
Mango fruits (Mangifera indica L. cv. Carabao) are susceptible to fungal infection, resulting in postharvest diseases. Chemical pesticides are used for disease management but may have a health impact and are costly. Therefore, alternatives to chemical control are necessary to minimize health risks and losses due to postharvest diseases. This research presented the disease-reducing effect of calcium salts, calcium chloride (CaCl2) and calcium carbonate (CaCO3), against mango stem end rot (SER) (sometimes caused by Lasiodiplodia theobromae) and anthracnose (caused by Colletotrichum gloeosporioides sensu lato). In in vitro assays, mycelial growth of both pathogens …
Exogenous Application Of Growth Regulators Improves The Growth And Quality Of Dahlia Variabilis L., Shahbaz Khan, Naeem Abbas, Zuhair Hasnain, Sami Ullah, Imran Hussain, Afroz Rais, Muhammad Atif Ghafoor, Danish Ibrar, Sohail Irshad, Maham Saddique, Muhammad Amjad Bashir, Samra Naseem, Muhammad Musawir Khan, Jawaher Alkahtani
Exogenous Application Of Growth Regulators Improves The Growth And Quality Of Dahlia Variabilis L., Shahbaz Khan, Naeem Abbas, Zuhair Hasnain, Sami Ullah, Imran Hussain, Afroz Rais, Muhammad Atif Ghafoor, Danish Ibrar, Sohail Irshad, Maham Saddique, Muhammad Amjad Bashir, Samra Naseem, Muhammad Musawir Khan, Jawaher Alkahtani
The Philippine Agricultural Scientist
Dahlia (Dahlia variabilis L.), a bulb crop sold as cut flower, garden ornamental/potted plant, becomes a popular cut flower in the world. This experiment was designed to study the effects of foliar applied gibberellic acid, zinc, ascorbic acid, and thiamine on the growth and flower attributes of dahlia. The study was conducted under greenhouse conditions at the Floriculture Research Area, University of Agriculture, Faisalabad, Pakistan. There were thirteen treatment with three levels each; gibberellic acid, zinc sulphate, ascorbic acid, and thiamine. First, foliar application was done at vegetative stage (after 45 d of transplantation) and second, at the flowering …
Detection Of ‘Candidatus Phytoplasma Luffae’ In Sponge Gourd, Bitter Gourd, And Bamboo From Laguna In Luzon, Philippines [Research Note], Filomena C. Sta. Cruz, Nuredin Habili, Qi Wu, Rezel Sagarino, John W. Randles
Detection Of ‘Candidatus Phytoplasma Luffae’ In Sponge Gourd, Bitter Gourd, And Bamboo From Laguna In Luzon, Philippines [Research Note], Filomena C. Sta. Cruz, Nuredin Habili, Qi Wu, Rezel Sagarino, John W. Randles
The Philippine Agricultural Scientist
In the Philippines, phytoplasma disease symptoms of little leaf and witches’ broom have been observed in sponge gourd (Luffa sp.), bitter gourd (Momordica charantia) and bamboo (Bambusa vulgaris). However, the cause of the disease remained unidentified. Molecular analysis was conducted to detect the presence and identify the phytoplasma associated with the diseased plants. Nested PCR has detected the presence of phytoplasmas in sponge gourd, bitter gourd and bamboo showing symptoms of little leaf and witches’ broom. Nucleotide BLAST and phylogenetic analyses of the 16S rRNA gene have identified ‘Candidatus Phytoplasma luffae’ belonging to group 16SrVIII …
Genetic Variability In Fusarium Oxysporum F. Sp. Vasinfectum Causing Damping-Off Of Cotton (Gossypium Barbadense L.) Seedlings [Research Note], Reda Helmy Sammour, Salah Abdel Moemen, Eman Elagamy
Genetic Variability In Fusarium Oxysporum F. Sp. Vasinfectum Causing Damping-Off Of Cotton (Gossypium Barbadense L.) Seedlings [Research Note], Reda Helmy Sammour, Salah Abdel Moemen, Eman Elagamy
The Philippine Agricultural Scientist
The genetic variability of Fusarium oxysporum f. sp. vasinfectum isolates from Gossypium barbadense L. seedlings were assessed using pathogenicity, mycelial compatibility, and RAPD analyses. The results showed that the disease incidence percentages and compatibility percentages considerably varied, extending from 33.2 to 86.6 % and 6 to 60 %, respectively in North Egypt and from 33.3 to 66.6 % and 0.0 to 20% in South Egypt. It also showed that the isolates ISO-8 and ISO-19 had the lowest disease incidence (33.2%) as compared with isolate ISO-5 (86.6%). Results of the mycelial compatibility had a reversible relationship with disease incidence percentage. Cluster …
Maximum Entropy (Maxent) Modeling Of The Potential Distribution Of Aspidiotus Rigidus Reyne (Hemiptera: Diaspididae) In The Philippines, Ireneo B. Pangga, Sheryl A. Yap, Arnold R. Salvacion
Maximum Entropy (Maxent) Modeling Of The Potential Distribution Of Aspidiotus Rigidus Reyne (Hemiptera: Diaspididae) In The Philippines, Ireneo B. Pangga, Sheryl A. Yap, Arnold R. Salvacion
The Philippine Agricultural Scientist
The coconut scale insect (CSI) Aspidiotus rigidus Reyne (Hemiptera: Diaspididae) poses a significant threat to coconut production in the Philippines as shown by recent outbreaks. Ecological niche modeling using Maximum Entropy (MaxEnt) was used to determine the effects of environmental factors on the infestation of A. rigidus, and map its potential distribution in the Philippines to assess the risk of future outbreaks. The influence of bioclimatic variables on A. rigidus infestation was determined using MaxEnt modeling using the location data of A. rigidus occurrence confirmed using molecular markers. Rainfall and temperature variables were important for A. rigidus distribution with …