Action thresholds of wet rice arthropods for pest management decision-making in Malaysia
Action thresholds to aid pest population management decision-making of 11 categories of wet rice arthropods are suggested in terms of mean population density per hill (x) and proportion of infestation (P(I)) of the field sampling units. The thresholds are the (x) and P(I) values at the point of sa...
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| Format: | Article |
| Language: | English |
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Universiti Putra Malaysia Press
1997
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| Online Access: | http://psasir.upm.edu.my/id/eprint/3608/1/Action_Thresholds_of_Wet_Rice_Arthropods_for_Pest_Management.pdf |
| _version_ | 1796966584110022656 |
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| author | Syed Hassan, Syed Tajuddin |
| author_facet | Syed Hassan, Syed Tajuddin |
| author_sort | Syed Hassan, Syed Tajuddin |
| collection | UPM |
| description | Action thresholds to aid pest population management decision-making of 11 categories of wet rice arthropods are
suggested in terms of mean population density per hill (x) and proportion of infestation (P(I)) of the field
sampling units. The thresholds are the (x) and P(I) values at the point of saturation of a polynomial regression
curve obtained by plotting (x) against P(I) for each arthropod category. The respective values for pests are: 3.38,
0.92 (Nephotettix spp.), 6.28, 1.00 (Nilaparvata lugens), 1.37, 0.72 (Cnaphalocrocis medinalisPyralidae),
2.42, 0.90 (Recilia dorsalis), 3.81, 0.97 (Sogatella furcifera), and for predators are: 3.89, 0.98
(Cyrtorhinus lividipennis), 2.39, 0.85 (Anatrichus pygmaeus- Diptera), 2.02, 0.82 (Odonata), 1.65, 0.81
(Casnoidea sPP), 1.61, 0.64 (paederus fuscipes), and 1.60, 0.69 (spiders). P(I) is significantly (P<O.OOl)
affected by arthropod category and growth stage of the crop. The observed pel) indicated high fits (most i>0.90)
to clumped- and Poisson-based distribution models. |
| first_indexed | 2024-03-06T07:01:37Z |
| format | Article |
| id | upm.eprints-3608 |
| institution | Universiti Putra Malaysia |
| language | English |
| last_indexed | 2024-03-06T07:01:37Z |
| publishDate | 1997 |
| publisher | Universiti Putra Malaysia Press |
| record_format | dspace |
| spelling | upm.eprints-36082015-09-07T02:43:27Z http://psasir.upm.edu.my/id/eprint/3608/ Action thresholds of wet rice arthropods for pest management decision-making in Malaysia Syed Hassan, Syed Tajuddin Action thresholds to aid pest population management decision-making of 11 categories of wet rice arthropods are suggested in terms of mean population density per hill (x) and proportion of infestation (P(I)) of the field sampling units. The thresholds are the (x) and P(I) values at the point of saturation of a polynomial regression curve obtained by plotting (x) against P(I) for each arthropod category. The respective values for pests are: 3.38, 0.92 (Nephotettix spp.), 6.28, 1.00 (Nilaparvata lugens), 1.37, 0.72 (Cnaphalocrocis medinalisPyralidae), 2.42, 0.90 (Recilia dorsalis), 3.81, 0.97 (Sogatella furcifera), and for predators are: 3.89, 0.98 (Cyrtorhinus lividipennis), 2.39, 0.85 (Anatrichus pygmaeus- Diptera), 2.02, 0.82 (Odonata), 1.65, 0.81 (Casnoidea sPP), 1.61, 0.64 (paederus fuscipes), and 1.60, 0.69 (spiders). P(I) is significantly (P<O.OOl) affected by arthropod category and growth stage of the crop. The observed pel) indicated high fits (most i>0.90) to clumped- and Poisson-based distribution models. Universiti Putra Malaysia Press 1997 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/3608/1/Action_Thresholds_of_Wet_Rice_Arthropods_for_Pest_Management.pdf Syed Hassan, Syed Tajuddin (1997) Action thresholds of wet rice arthropods for pest management decision-making in Malaysia. Pertanika Journal of Tropical Agricultural Science, 20 (1). pp. 65-74. ISSN 0126-6128 http://www.pertanika.upm.edu.my/Pertanika%20PAPERS/JTAS%20Vol.%2020%20(1)%20Apr.%201997/08%20JTAS%20Vol.20%20(1)%201997%20(Pg%2065-74).pdf |
| spellingShingle | Syed Hassan, Syed Tajuddin Action thresholds of wet rice arthropods for pest management decision-making in Malaysia |
| title | Action thresholds of wet rice arthropods for pest management
decision-making in Malaysia |
| title_full | Action thresholds of wet rice arthropods for pest management
decision-making in Malaysia |
| title_fullStr | Action thresholds of wet rice arthropods for pest management
decision-making in Malaysia |
| title_full_unstemmed | Action thresholds of wet rice arthropods for pest management
decision-making in Malaysia |
| title_short | Action thresholds of wet rice arthropods for pest management
decision-making in Malaysia |
| title_sort | action thresholds of wet rice arthropods for pest management decision making in malaysia |
| url | http://psasir.upm.edu.my/id/eprint/3608/1/Action_Thresholds_of_Wet_Rice_Arthropods_for_Pest_Management.pdf |
| work_keys_str_mv | AT syedhassansyedtajuddin actionthresholdsofwetricearthropodsforpestmanagementdecisionmakinginmalaysia |