TY - JOUR
T1 - Distribution patterns of Diaphorina citri Kuwayama (Hemiptera: Psyllidae) eggs, nymphs and adults in a Malaysian citrus orchard
AU - Leong, Sui Sien
AU - Leong, Stephen Chan Teck
AU - Abang, Fatimah
AU - Beattie, G. Andrew C.
AU - Kueh, Roland Jui Heng
PY - 2018
Y1 - 2018
N2 - Spatial distribution of eggs, nymphs and adults of Diaphorina citri (Hemiptera: Psyllidae) was studied in a commercial orchard in SW Sarawak, Malaysia, using mean–variance test, the index of dispersion, and the negative binomial distribution. To further ascertain and confirm the distribution pattern in the population of the psyllid, dispersion indices (index of mean crowding, Lloyd’s index of patchiness, Taylor’s power law and Iwao’s patchiness regression) were calculated. Measurable tests showed that distribution of eggs and nymphs in naturally occurring psyllid populations was highly aggregated, resulting from initially aggregated migration of adults and a contagious dispersion of them on flushes as the population density increased.
AB - Spatial distribution of eggs, nymphs and adults of Diaphorina citri (Hemiptera: Psyllidae) was studied in a commercial orchard in SW Sarawak, Malaysia, using mean–variance test, the index of dispersion, and the negative binomial distribution. To further ascertain and confirm the distribution pattern in the population of the psyllid, dispersion indices (index of mean crowding, Lloyd’s index of patchiness, Taylor’s power law and Iwao’s patchiness regression) were calculated. Measurable tests showed that distribution of eggs and nymphs in naturally occurring psyllid populations was highly aggregated, resulting from initially aggregated migration of adults and a contagious dispersion of them on flushes as the population density increased.
KW - Diaphorina citri
KW - citrus
KW - diseases and pests
KW - eggs
KW - nymphs (insects)
KW - Hemiptera
KW - Malaysia
UR - http://handle.westernsydney.edu.au:8081/1959.7/uws:47967
U2 - 10.5281/zenodo.1298369
DO - 10.5281/zenodo.1298369
M3 - Article
SN - 0075-1243
VL - 48
SP - 49
EP - 62
JO - Israel Journal of Entomology
JF - Israel Journal of Entomology
IS - 1
ER -