Seasonal Incidence of Scale Insect Hemilecanium Imbricans (Green) on Mango and Different Host Plants in Dharwad District of North Karnataka

Volume : IV, Issue : IV, April - 2015

Prakash, Patil R. R

The scale insect Hemilecanium imicans (Green) was found damaging the twigs and tender anches of many

host crops along with fruit crop mango. This pest was active during winter (Nov-Dec-Jan) and affects the growth of

the host plants adversely. The incidence of this scale starts from October months and persistent up to May-June on all host crops. The eggs of

these insects were observed during October-November months on all host plants. However on all different host plants the incidence of scale

insect was peak in Feuary and March months with a range of 90.40-190.80 per 10 cm length of twigs which were coincide with the grand

growth stage of all host plants. The recorded hosts other than mango were includes, viz., Ficus religiosa, Jathropa curcas, Flyggea lycoperos,

Elaegnus conferata, Sterospermum persunatum and Legerstromia flas regini. Among all the host plants the mango infested with maximum

number of scales (190.80 per 10 cm length). The data on scale insect population on many hosts revealed that incidence was recorded with

range of 90.40-190.80 per 10 cm length. The highest number was recorded on mango and least number was on Flyggea lycoperos (90.40 per 10

cm length). Other hosts viz., Ficus religiosa (128.80), Jathropa curcas (95.80), Elaegnus conferata (105.80), Sterospermum persunatum (96.00)

and Legerstromia flas regini (188) were also harbored the highest scale insect population