Preliminary survey of pests and diseases of eucheumatoid seaweed farms in the Philippines

Mango is one of the most important fruits in the Philippines, with the Carabao variety being the most widely grown dominating the export market. However, the production of Carabao mangoes for export has dropped due to insect pests and diseases, resulting in serious postharvest decay. Anthracnose is the most common of these diseases. DigiMango is a mobile application that identifies the severity of anthracnose in Carabao mangoes during postharvest. The application offers to quantitatively evaluate the development of spot-like lesions on the surface of the mango and produce disease ratings. However, because this application is created for use in laboratory conditions, the mangoes used in the planning and testing were already pre-evaluated and the diseases pre-identified, with the applicationâ€™s sole purpose providing convenience and objective rating evaluations to the researchers. The application was able to map the lesions by capturing the four sides of the mango using the smartphoneâ€™s camera and converted the process using a combination of the following: cannyedge detection, morphological transformation, contour approximation, and a thresholding algorithm. After thorough evaluation of the application, the study has proven that the use of the DigiMango application is acceptable and positively correlated with the expertsâ€™ rating. Any difference with the hedonic scales used by the researchers is not statistically significant.

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Senna spectabilis (whitebark senna).

10.1079/fc.11464.20210113781 ◽

2021 ◽

Author(s):

Marianne Jennifer Datiles ◽

Pedro Acevedo-Rodríguez

Keyword(s):

Acid Soils ◽

The Philippines ◽

Humid Tropics ◽

Senna Siamea ◽

Cultural Management ◽

Pests And Diseases ◽

General Utility ◽

Senna Spectabilis ◽

Deep Soils ◽

Fast Growing Species

Abstract Senna spectabilis is an attractive small- to medium-sized (to about 10 m tall) multi-stemmed tree, native to Central and South America and naturalized in many other parts of the humid tropics, particularly the Philippines and East and southern Africa. It is a fast-growing species, particularly on deep soils, and is fire- and termite-resistant and tolerant of strongly acid soils. It is reported to be easier to raise, less susceptible to pests and diseases, and more drought-resistant than Senna siamea. It is often planted for fuelwood, as an ornamental and as a shade tree in agroforestry situations. Although a legume, it is not a nitrogen-fixing species but is nevertheless useful for fodder, mulches, and as a honey source. Its rapid regeneration and growth make it a potential weed. The wood is of small dimensions, commonly used as fuelwood; posts; building poles; and general utility. Further research is needed on the cultural management of S. spectabilis.

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Goniocysts, Goniocystangia and Opegrapha Lambinonii and Related Species

The Lichenologist ◽

10.1017/s0024282985000032 ◽

1985 ◽

Vol 17 (1) ◽

pp. 1-25 ◽

Cited By ~ 7

Author(s):

E. Sérusiaux

Keyword(s):

Costa Rica ◽

Related Species ◽

The Philippines ◽

Preliminary Survey ◽

Rain Forests

AbstractThe term gomocyst, introduced by Norman in the last century, has been used to designate lichen thalli consisting of algal colonies embedded in a hyphal envelope. It has been applied to the Moriolaceae, ‘Botrydina’ and several groups in the Lecideaceae s. lat. A preliminary survey demonstrates that the concept encompasses different structures. Nevertheless, and ad interim, the term is here used to describe the small diaspores produced by several species of foliicolous Opegrapha in a peculiar organ, the gomocystangium. Four such species are known in Opegrapha: O. dibbemi sp. nov. in Costa Rica, O. lambinoniiSérusiaux in Zaire, O. luzonensis sp. nov. in the Philippines and O. santessonii sp. nov. in Zaire, but foliicolous lichen thalli with goniocystangia are known from undisturbed rain forests at low elevations in four continents.

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International Atomic Energy Agency

International Organization ◽

10.1017/s002081830000045x ◽

1964 ◽

Vol 18 (1) ◽

pp. 174-175

Keyword(s):

Developing Countries ◽

International Atomic Energy Agency ◽

Nuclear Power ◽

Annual Report ◽

The Philippines ◽

Atomic Energy ◽

Preliminary Survey ◽

Energy Agency ◽

The Past ◽

Board Of Governors

Annual Report of the Board of Governors to the General Conference:The report of the Board of Governors of the International Atomic Energy Agency (IAEA) to the seventh General Conference of the Agency covered the period July 1, 1962, to June 30, 1963. The report noted that one of the significant developments during the past year had been the General Assembly's decision at its seventeenth session to hold a third International Conference on the Peaceful Uses of Atomic Energy in Geneva in 1964. There had also been in developing countries an increasing interest in nuclear power, and preliminary survey teams had been sent by the Agency to Pakistan, the Philippines, and Thailand.

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THE RICE PLANTING WINDOW IN THE PHILIPPINES: AN ANALYSIS USING MULTI-TEMPORAL SAR IMAGERY

ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences ◽

10.5194/isprs-archives-xlii-4-w19-241-2019 ◽

2019 ◽

Vol XLII-4/W19 ◽

pp. 241-248

Author(s):

M. A. Gutierrez ◽

N. M. Paguirigan ◽

J. Raviz ◽

M. R. Mabalay ◽

E. Alosnos ◽

...

Keyword(s):

Crop Production ◽

The Philippines ◽

Wet Season ◽

Planting Dates ◽

Pests And Diseases ◽

Rice Area ◽

Multi Temporal ◽

Sar Imagery ◽

Crop Area ◽

June July

Abstract. Knowing where and when rice is grown is essential for planning and decision-making in relation to food security, as well as in research wherein crop area and calendar are important inputs in crop production simulations, assessment of biotic and abiotic stresses, and analysis of the effect of climate change on crop production, among others. Remote sensing allows for efficient mapping and characterization of rice areas. In this study, we derived the rice planting window in all rice growing regions in the Philippines from 2016 to 2018 using multi-temporal Synthetic Aperture Radar (SAR), specifically TerraSAR-X and Sentinel-1. Using a rule-based method, rice area and Start of Season (SoS) were mapped based on the unique backscatter behaviour of rice corresponding to the initial deliberate agronomic flooding followed by rapid biomass increase. We defined the planting window per year and semester as the 15th and 85th percentile and the peak of planting as the dominant planting date. The accuracy of the rice map was 93% and the SoS was strongly correlated with the actual planting dates reported by farmers (R2 = 0.71) based on 482 ground observations in the Philippines in 2018 Semester 1. From this analysis, the planting window in the Philippines for the Semester 2 (wet season) is April-August (peak in June-July), and for Semester 1 (dry season) is September-February (peak in November-December) with large differences across regions. In majority of the regions, the planting window spans more than 100 days, which can have implications on incidence of pests and diseases.

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