Insect visitors of robusta coffee (coffea canephora) from flowering to fruit setting / by Ma. Elena O. Canilao.
Material type:
TextLanguage: English Publication details: Indang, Cavite : Cavite State University- Main Campus, 2019.Description: xiv, 69 pages : illustrations ; 28 cmContent type: - text
- unmediated
- volume
- 574 C16 2019
- College of Arts and Sciences (CAS), Department of Biological Sciences.
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Ladislao N. Diwa Memorial Library Theses Section | Non-fiction | 574 C16 2019 (Browse shelf(Opens below)) | Link to resource | Room use only | T-8059 | 00077316 |
Thesis (Bachelor of Science in Biology) Cavite State University.
Includes bibliographical references.
College of Arts and Sciences (CAS), Department of Biological Sciences.
CANILAO, MA. ELENA 0. Insect Visitors of Robusta Coffee (Coffea canephora) from Flowering to Fruit setting. Undergraduate Thesis. Bachelor of Science in Biology, major in General Biology. Department of Biological Sciences. College of Arts and Sciences. Cavite State University, Indang, Cavite. May 2019. Adviser. Prof. Dickson N. Dimero.
This study aimed to assess the insect activity on Robusta coffee from flowering to fruit setting. Observation period was from October 2018 to January 2019 and done at National Coffee Research, Development and Extension Center located at Cavite State University — Main Campus, Indang, Cavite. Seven species belonging to Formicidae, Apidae and Diptera were observed during the pre-flowering until fruit setting of Robusta coffee. These insect visitors include Black ant (Dolichoderus thoracicus), (Polyrhachis bicolor), Stingless bees (Tetragonula birio Friese), Honeybees (Apis cerana), Diptera, Blow fly (Calliphoridae), and Carpenter bee (Xylocopidae). The black ant was considered as naturally associated insect and beneficial insect of robusta coffee while Polyrhachis bicolor was the natural enemy of other insect. Stingless bees (Tetragonula birio Friese), Honeybees (Apis cerana), Diptera, Blow fly (Calliphoridae), and Carpenter bee were considered as true pollinators of Robusta coffee where they collect nectar/pollen from the flower of robusta coffee. During pre-flowering stage, at 6:00 A.M of observation, both Black ant and Polyrhachis bicolor were numerous. At 12:00 P.M, the number of Black ant decreases while at 2:00 P.M the Polyrhachis bicolor decreased. During flowering stage, the pollinators were numerous at 9:00 A.M and Stingless bees had the highest population.
The lowest number of pollinators was observed at 12:00 1:00 P.M and Stingless bee was the major pollinator present. Carpenter bee and Blow fly were numerous at 6:00 A.M, Diptera was at 7:00 A.M and Honey bee at 1:00 P.M. During fruit setting stage, Black ant was numerous at 6:00 A.M and its number decreased by 2:00 P.M. This was the only insect present on fruit setting stage. During the pre-flowering stage of Robusta coffee, Dolichoderus thoracicus (Black ant) had the highest population count of 811 (80.22%). While on the flowering stage, Tetragonula biroi (Stingless bee) had the highest population count of 486 (92.93%). During the fruit setting stage, Dolichoderus thoracicus (Black ant) was the only insect visitor present with a population count of 248 (100%). The mean values for light intensity for the pre-flowering, flowering and fruiting season of Robusta coffee were 4901.14 lux, 4306.22 lux and 3617.95 lux. The mean values for relative humidity for the pre-flowering, flowering and fruiting season of Robusta coffee were 71.15 %RH, 78.39 %RH, 76.52 %RH. The mean values for temperature for the pre-flowering, flowering and fruiting season of Robusta coffee were 28.65 °C, 27.06 °C and 26.74 °C. The insect visitors of Robusta coffee had weak to negative moderate correlation with light intensity, relative humidity and temperature.
Submitted to the University Library July 03, 2019 T-8059