EFFICIENCY OF POTASSIUM SULFONATE COMPARING WITH OTHER CHEMICALS AGAINST LAND SNAIL Monacha cartusiana SNAIL INFESTING CUCUMBER CROP AT SHARKIA GOVERNORATE.

Methomyl , patassium sulfonate solution salt and copper sulfate were
tested against land snail Monacha cartusiana which was considered a main
pestes attaking cucumper crop.
Under the laboratory conditions the incubation period influenced
significantly by the three tested compounds. Methomyl, potassrm sulfonate and
copper sulfate prolonged incubation period to 22 . 75 , 21. 25 and 20.00 days
comparing to 17.50 days in case of control. The tested chemicals
concentrations decreased hatehability percentages to 38.38, 43.33and 56.31%
for methomyl, potassium suffonate and copper sulfate, respectively. comparing
to 97.00% in case of contrl. After one day of exposure mortality percentages
were ranged between 23.75% - 43.25% 19.50 – 39.75% 18.50 – 37.50% and
increased till reached 71.50 – 86.75%, 57.75 – 83.50% and 45.75 – 64.00%
after 3 weeks of exposure for methomyl, potassium sulfonate and copper
sulfate, respectively.
Under field conditions reduction perceutages increased as the
concentrations increased and reached the highest reduction after 3 weeks.
Reduction percentages ranged between 52.75 – 77.50% , 47.50 – 74.75% and
40.00 – 61.25% for methomyl, potassium sulfonate and copper sulfate
,respestively.
The effect of the three chemicals on cucumber yield showed possitively
increase compared with control. The increase percentages in cucumber yield
were ranged between 24.00 – 42.91% , 16.6 – 35.14% and 3.38 – 22.30% for
methomyl, potassium sulfonate and copper sulfate, respectively.