Effect of jojoba and moringa essential oils and cascade on grasshoppers in the field

الملخص EN

Efficacy of moringa and jojopa essential oils and cascade was tested against 3rd, 4th and 5th nymphal instars of different species of grasshoppers at El-Baharia Oasis (western desert of Egypt) by using Ulva sprayer (ULVA+).

Mortality percentages were calculated after 2, 4, 6, 8, 10 and 12 days post treatment.

The results indicated that the mortality percentages of grasshoppers were 96, 65 and 87% by moringa, jojopa and cascade, respectively after 12 days post treatment.

The effects of moringa, jojopa and cascade on trehalase, chitinase and protease activities were tested in haemolymph of some nymphal instars of grasshoppers.

There was insignificant difference activity between moringa and control after 2 days.

Also the difference in chitinase activity was insignificant between moringa and control after 2 and 4 days, while decreased significantly after 6 days from treatment.

In cascade and jojopa increased also after all periods after treatment.

The difference in protease activity was insignificant between moringa and control after 2 days while caused increase significant between jojopa and control after 4 and 6 days after treatment.

There was no significant difference after 2 days but increased inactive significantly after 4 and 6 days compared with control.

In cascade increased significantly after 2, 4 and 6 days after treatment.

The efficacy of moringa and jojopa essential oils and cascade in all treatments can be useful for development safe elements for an IPM strategy to grasshoppers.