Abstract:
This study was undertaken at Elghaba Agricultural Scheme, Eldabba
locality, Northern State to evaluate the effectiveness of the extracts of two
plants argel and usher against the green date palm pit scale insect
(Asterolicanium phoenicis) and their effect on the productivity. The
experiments were carried out in 4 villages in the area (Arab Narti, Wad-
diab, Gharab Dongola and Elkinduwa people's scheme).
Argel and usher powder were used by three methods of soil leaf
powder application (dose 100 gm/palm), spray of leaves water extract
(dose 100 gm/palm) and soil + spray of leaves water extract (dose 100gm
soil + 100 spray/ palm). Actara 25 W.G Thimethoxam (Neonicotinoid
group) (dose 20gm/palm) was used as recommended and for comparison.
To evaluate the effects of the plant extract after each treatment, 8
leaflets were chosen randomly from the 4 directions from each tree at
biweekly intervals. From these 4 leaflets were chosen and each one was
inspected under a binocular microscope to calculate the adult and
immature mortality in an area of 1 cm2.
The results showed that, the application of argel and usher in all
treatments caused higher percent mortality of both adult females and
immature stages compared to untreated control up to the 8 th week after
application.
Also all treatments increased the yield compared to the untreated
control.
According to the results of the present study, the soil argel application
at 100gm/tree at 6 week intervals should be recommended as an effective
treatment to control the green date palm pit scale insect.
