Monthly Philippine Agro-climatic Review and Outlook

August 2020

August 2020

  • During the month of August, the weather systems that affected the country were the easterlies, intertropical convergence zone (ITCZ), localized thunderstorms, southwest monsoon (SW), low pressure area (LPA) and tropical cyclones (TC). Seven (7) TCs namely: Severe Tropical Storm (STS) “Dindo” (July 31- Aug. 3), Tropical Storm (TS) “Enteng” (Aug 8-9), TD “Ferdie” (Aug 9-10), TD “Gener” (Aug 10), TD “Helen” (Aug. 17), STS “Igme” (Aug 21-22) and Typhoon (TY) “Julian” (Aug 28-31) have developed and entered the Philippine Area of Responsibility (PAR) within the period.
  • Three (3) TCs developed at PAR during the first dekad of August (STS “Dindo”, TS “Enteng” and TD “Ferdie”). These TCs did not make landfall but enhanced the southwest monsoon and brought rainshowers mostly at the western section of the country. During the second dekad, Mindanao, Visayas, Bicol Region and MIMAROPA received significant amount of rainfall due to the ITCZ. TD “Gener” developed on the second dekad of August but weakened into LPA at the same day. The western section of the country experienced rainshowers due to the effects of the southwest monsoon. STS Igme and TY Julian have developed during the third dekad of August. Rainshowers and thunderstorms were experienced mostly at the northern and northwestern sections of Luzon.
  • Derived Soil Moisture Condition (rainfed areas):
    • Wet – CAR, Central Luzon, Quezon City, CALABARZON, Zamboanga del Norte, Northern Mindanao, CARAGA Region, ARMM, most areas in Ilocos Region, MIMAROPA, Eastern Visayas, rest of Bicol Region, Western Visayas, Central Visayas, and Davao region;
    • Moist – Batac, most areas of NCR, Puerto Princesa, Aborlan, Masbate, Albay, Virac, Iloilo, Capiz, Bohol, Guiuan (Samar), Maasin (Leyte), Davao, SOCCKSARGEN;
    • Dry – rest of Zamboanga peninsula
  • Way below to below normal rainfall were observed in most areas of western Luzon and Visayas while near to above normal rainfall were experienced over the rest of the country (Figure 1). Tagum Agromet Station in Davao del Norte recorded the highest total monthly rainfall (557.2 mm).
  • Near to slightly average surface air temperatures were felt over most parts of the country with patches of above average temperatures over Panay Island, Palawan, Zamboanga del Norte, and the western sections of Central Luzon and Mindanao (Figure 2). The highest maximum temperature in the month of August has reached 35.8°C in General Santos, South Cotabato (August 29) while the coldest temperature of 15.2°C was recorded in Baguio City (August 2).
  • Cool ENSO-neutral condition persisted during the period in the tropical pacific.

  • Land and Seedbed Preparation – (irrigated rice and corn fields, other cash crop plantation, small and medium farm areas)
  • During the community quarantine due to covid-19 pandemic, most of the farmers continue to prepare the land for irrigated, rainfed and upland rice, rainy season corn and other high yielding crops in most farms of the country.
  • Planting and Transplanting (broadcasting / direct seeding – for rice, corn, conventional way/ by rows - other cash crops)
  • Type I Climate (western parts of Luzon, Mindoro, Negros and Palawan) – upland corn, munggo, potato, ampalaya, pechay, patola, ginger, sweet pepper, mustard, cucumber, squash, chayote and mustard
  • Type II Climate (Catanduanes, Sorsogon, eastern part of Camarines Norte and Camarines Sur, eastern part of Quezon and Aurora, eastern part of Leyte and eastern part of Northern Samar, large portion of eastern Mindanao) – upland rice, rainy season corn, rainy season peanut, bountiful beans, munggo, eggplant, tomato, ubi, potato, cowpea, okra, patola, squash, sweet potato, gabi, ginger, carrots, kutchai, cassava and sweet pepper
  • Type III Climate (western part of Cagayan, Isabela, Nueva Vizcaya, east of Mt. Province, southern Quezon, Bondoc Peninsula, Masbate, Romblon, northeast Panay, eastern Negros, central and southern Cebu, part of northern Mindanao, most of eastern Palawan) lowland rice and corn, okra, patola, ampalaya, mustard, celery, gabi, soybean, peanuts, ginger, squash, papaya, cassava, ubi, peanuts, munggo and eggplant
  • Type IV Climate (Batanes provinces, northeast Luzon, western Camarines Norte and Camarines Sur, Albay, eastern Mindoro, Marinduque, western Leyte, northern Negros, and most of central and southern Mindanao) – lowland rice, rainy season corn, munggo, potato, cadios, cabbage, cauliflower, celery, mustard, pechay, eggplant, okra, gabi, ginger, radish, sweet peas, kutchai, cassava, sweet potato and chayote
  • Establishment Stage (germination, pre-emergence, seedling, transplanting) – munggo, potato, ampalaya, pechay, patola, ginger, sweet pepper, mustard, cucumber, squash, chayote, mustard, kutchai, and sweet pepper
  • Vegetative Stage (tillering, head development) - for those late planted rice and corn (irrigated, upland and rainfed)/Other high yielding cash crops such as beans such as sweet peas, munggo, batao, sitao, patani, seguidillas, cadios, soybean, bountiful beans, as well as muskmelon sweet pepper, chayote, melon peanuts, squash, eggplant, okra, ginger, ampalaya, cucumber, patola, sweet potato, ubi, condol, cauliflower, lettuce, pechay, kutchai, spinach, squash, , upo, radish, and carrots - in most farm areas of the country.
  • Flowering Stage (heading stage – for rice) (tasselling and silking stages – for corn); for those rice and corn (irrigated, upland and rainfed) which timely follow the cropping pattern and other vegetables and crops such as sugarcane, mustard, ubi, string beans, sweet pepper, sweet potato, ampalaya, upo, garlic, beets, celery, lettuce, onion, spinach, potatoes, gabi, squash, cassava, ginger, mungo, patola, pechay, cabbage, and cucumber - in selected farm areas of the country.
  • Yield Formation / Grain Fixing Stage (rice and corn)early planted rice and corn, sweet peas, soybeans, cadios, patani, seguidillas, cowpea, bountiful beans – selected farm areas of Regions 1, 2 and 3, and other small pocket farm areas in the country.
  • Maturing/Ripening/ Harvesting Stage
  • Luzon: Rice (some parts of Bicol, Marinduque, Romblon), banana, papaya, avocado, sitao, patola, eggplant, lettuce, celery, lemon, rambutan, ampalaya, tomato, dragon fruit, santol, atis, pechay, guyabano, pineapple, cassava, cucumber, chayote, and sweet potatoes.
  • Visayas: Eggplant, corn, guyabano, squash, sitao, chayote, banana, papaya, avocado, pineapple, santol, cashew, rambutan, lanzones, and cucumber.
  • Mindanao: Rice (over ARMM), marang, rambutan, mangosteen, durian, jackfruit, guyabano, tomato, pomelo, avocado, banana, lettuce, cabbage, santol, corn, eggplant, amplaya, and sitao.
  • Farm Operations: (some farm activities are affected by ECQ)
  • Most farms of the country which timely follow the cropping pattern for rice and corn are in maturing stage. Early planted rice and corn are in vegetative and flowering stages. Late planted rice and corn are in booting and silking stages.
  • Cultivation, weed removal, pruning, spraying insecticide and herbicide application continue.
  • Water is critical during the first 10 days after transplanting as this is the time weed seeds also begin to germinate. Maintaining enough water will suppress weed growth while water stress during the flowering stage results in empty or half-filled grains.
  • In this time of covid-19 pandemic, Agricultural technicians can still share to the famers some tips on potential crop production, early warning for pests and diseases infestations and water management strategies by visiting the website of SARAI project (https://sarai.ph)
  • For daily farm weather and climate conditions, Agricultural technicians, farmers, and farm enthusiasts can visit website of PAGASA (http://bagong.pagasa.dost.gov.ph/) and/or upload the mobile application Payong PAGASA
  • The weather systems that will likely affect the whole country during the month of September are the ITCZ, SW monsoon, LPA, localized thunderstorms, and two or three TCs may develop or enter the PAR.
  • For this month, near to above normal rainfall conditions are expected in most parts of the country especially in western and northern Luzon (Figure 4).
  • Generally, near to slightly above average temperatures will be felt in most areas of the country (Figure 5) with above average temperatures over Zambales, Palawan, Davao and Zamboanga del Norte. Slightly cooler temperatures are expected in some portions of Occidental Mindoro, Romblon, Southern Leyte, southern portion of Eastern Samar and Laguna.
  • Luzon will have extreme temperature range of 14.5ºC – 27.0ºC for upland farms while 20.0ºC – 37.0ºC for other farms in Luzon; the lowland farms in Visayas will have 22.0ºC – 36.0ºC; and the upland farms in Mindanao will have 16.0ºC – 33.0ºC and 19.5ºC – 36.0ºC for lowland farms.
  • Cool ENSO-neutral condition persists with 60% possibility of La Niña (Figure 6).

PAGASA will continue to closely monitor the climate conditions that may affect the country and updates shall be issued as appropriate. For further information, please contact the Climatology and Agrometeorology Division (CAD) at telephone number 8284-0800, local 905.
JORYBELL A. MASALLO
OIC, FWSS / CAD


EDNA L. JUANILLO
Chief, CAD