ISHS Acta Horticulturae 710: International Symposium on Greenhouses, Environmental Controls and In-house Mechanization for Crop Production in the Tropics and Sub-Tropics
DYNAMICS AND SPATIAL DISTRIBUTION OF APHIS GOSSYPII AND INCIDENCE OF APHID BORNE VIRUS DISEASES ON BELL PEPPER PLANTED UNDER PROTECTIVE STRUCTURES AND OPEN FIELD |
| Authors: | M.N.M. Roff, H.M. Norowi, MD.T. Rahman, S.K. Green |
| Keywords: | Aphis gossypii, population, spatial distribution, aphid borne virus diseases, bell pepper, protective structure |
| Abstract:
Aphis gossypii is considered as an important vector of chilli veinal mottle potyvirus (CVMV) and cucumber mosaic cucumovirus (CMV) in Malaysia. The population of A. gossypii and the incidences of CVMV and CMV on bell pepper were evaluated under four types of production systems. The production systems were wooden rainshelter with netting, wooden rainshelter without netting, open field cultivation where beds were covered with reflective plastic mulch and open field cultivation without plastic mulch on planting beds. Data collection commenced from 14 to 92 days after transplanting (DAT). The number of apterae A. gossypii was found to be significantly higher (p>0.05) in the wooden rainshelter with netting (267.5 aphids/ plant) compared to the wooden rainshelter without netting (263.6 aphids/plant), open field cultivation where beds were covered with reflective plastic mulch (188.3 aphids/ plant) and open field cultivation without plastic mulch on planting beds (132.5 aphids/plant). The distribution of the apterae A. gossypii on bell pepper in all the cropping systems was aggregated. The number of alatae A. gossypii was lowest in the production system with beds covered with reflective plastic mulch. Incidences of CVMV and CMV were reduced and delayed on bell pepper planted under the wooden rainshelter with netting and were highest in plot of open field cultivation where no reflective plastic mulch was used. | |
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