Effect of Raoiella Indica Hirst (Acari: Tenuipalpidae) Infestation on Chlorophyll and Photosynthetic Efficiency of Areca Catechue

Abstract

Abstract- 'a', 'b', 'total chlorophyll' and 'photosynthetic efficiency'. The percentage loss in chl 'a', chl 'b' and 'total chlorophyll' were 62.21±0.63, 57.67±0.73 and 59.884±0.375

Impact of Raoiella indica Hirst (Acari: Tenuipalpidae) Infestation on Nitrogen Concentration of Areca catechu L.

“…Rearing of mites was carried out in the laboratory by placing live mites on leaf discs of 2.5 cm length X 2.5 cm width placed on moistened cotton pads kept in Petri dishes. Live specimens comprising 20-25 adults of R. indica were transferred to fresh uninfested leaves of A. catechu" [9]. Regular observations were carried out under a microscope to record the development of feeding symptoms on the leaf samples.…”

“…Quantitative analysis of feeding damage was made by estimating the loss of 'total nitrogen' contents in the leaf tissues of A. catechu infested by R. indica following the method of 'Kjeldahl (Rack) AOAC 984.13 (1883) method". [9] The percentage of nitrogen loss in the mite-infested leaves was calculated by comparing the total nitrogen value of infested and uninfested samples. Statistical analysis of the data on nitrogen loss was carried out by following the test to evaluate the significance (Statistical Package used: SPSS, ver-12).…”