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003 | OSt | ||
005 | 20231009100653.0 | ||
008 | 220830b |||||||| |||| 00| 0 eng d | ||
040 | _cCvSU Main Campus Library | ||
041 | 0 | _aeng | |
082 | 0 | 4 |
_a633.73 _bEr1 2019 |
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_928109 _aErro, Harlene N. _eauthor |
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_aPopulation dynamics of coffee insect pests and their natural enemies in Amadeo, Cavite / _cby Harlene N. Erro. |
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_aIndang, Cavite : _bCavite State University- Main Campus, _c2019. |
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_axiii, 65 pages : _billustrations ; _c28 cm. |
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_2rdacontent _atext |
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_2rdamedia _aunmediated |
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_2rdacarrier _avolume |
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500 | _aThesis (Bachelor of Science in Agriculture Major in Crop Science) Cavite State University. | ||
504 | _aIncludes bibliographical references. | ||
508 | _aCollege of Agriculture, Food, Environment and Natural Resources (CAFENR), Department of Crop Science | ||
520 | 3 | _aERRO, HARLENE N. Population Dynamics of Coffee Insect Pests and their Natural Enemies in Amadeo, Cavite. Undergraduate Thesis. Bachelor of Science in Agriculture Major in Crop Science. Cavite State University, Indang Cavite. June 2019. Adviser: Dr. Evelyn O. Singson The study was conducted from June to December 2018 in a coffee farm located at Dagatan, Amadeo, Cavite, to assess the population dynamics of coffee insect pests and their natural enemies. Specifically, the study aimed to: (1) identify the coffee insect pests observed in the coffee farm; (2) identify the natural enemies associated with the insect pests of coffee; (3) determine the incidence of coffee insect pests; (4) determine the infestation rate of coffee insect pests; and (5) distinguish the factors affecting the population dynamics of the insects in the coffee farm. This study is a descriptive type of research. Visual observation, recording, collection and preservation of insects found from the top, middle and bottom portion of the 30 sample trees located in the area were done to gather relevant data for the study. Data gathering was done every morning, and once a week for six months. Twenty-three insect pests which belong to the insect order Coleoptera, Diptera, Hymenoptera, Hemiptera and Homoptera were collected from the study site. In addition, ten natural enemies which belong to the orders Coleoptera, Hymenoptera, Neuroptera, Mantodea and Arachnida (order Araneae) were encountered in the study site. The most notable natural enemy identified is the mealybug destroyer larvae which feeds on green coffee scale and green lacewings which predates on leafhoppers and green coffee scale. On the other hand, the green coffee scale has the highest pest incidence and highest infestation rate. The population of insect pests showed an increasing trend from June to September which decreased thereafter. Temperature and relative humidity appear to have no significant effect on the pest population. On the other hand, the population of natural enemies increased in June and July which then decreased the following month. The temperature but not relative humidity reveals to have a significant effect on their reproduction. However, there are other factors such as elevation and rainfall that must be considered to truly determine the population dynamics of coffee insect pests and natural enemies in Amadeo, Cavite. | |
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_cSubmitted to the University Library _d08-05-2019 _eT-8619 |
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_93553 _aCoffee _xPests and diseases |
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_91144 _aPesticides |
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_913667 _aInsects pests |
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_91367 _aBachelor of Science in Agriculture _xCrop Science |
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_93566 _aSingson, Evelyn O. _eadviser |
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_uhttp://library.cvsu.edu.ph/cgi-bin/koha/opac-retrieve-file.pl?id=f1764cf56466fa1fe11af9f2e3bb2545 _yClick here to view thesis abstract and table of contents |
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_2ddc _cMAN |
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_c61238 _d61238 |