Repellent effect of certain chemicals compounds on wild birds attacking wheat and cowpea under field conditions

الملخص EN

The efficacy of Tukam® and VP Skud® compounds were tested as repellents against wild birds attacking wheat and cowpea fields in Sharkia Governorate.

In the wheat crop experiment, the house sparrow Passer domesticus niloticus attacked the spikes with the highest percentage of damage (14.82% ) in the control trial, during the 6th week when spikes emergence.

While damage percentages were 11.19, 9.22, 8.94 and 8.73% when applying Tukam® concentrations of 2.5, 5, 10 and 15 ml/liter, respectively during the same period in the treatment trials.

The highest protection percentage was obtained in the 4th week with 15, 10, 5 and 2.5 ml/liter, respectively.

The same trend was found with VP Skud®, since the highest percentages of damage were 10.07% , 9.16% , 8.08% and 6.20% in the 6th week with the four concentrations 1, 2, 4 and 6 ml/liter, respectively.

While the protection percentage were the highest during the 4th week with concentrations of 6, 4, 2 and 1 ml/liter, respectively.

In the cowpea experiment, pigeon (Cloumba sp.

) attacked the pods and caused high percentage of damage reached 13.32 % in the 5th week of the control trial.

When spraying Tukam® at a concentration of 15.0 ml/liter, the damage was dropped considerably as compared with other concentrations or control after pollination.

The decrease in damage was found to be 2.11, 3.88, 4.74 and 7.38% , after the 2nd, 3rd, 4th and 5th week, respectively.

The highest protection percentage was recorded with the concentration of 15 ml/liter.

The same trend was recorded with VP Skud®.

It gave the lowest percentage of damage at the concentration of 6 ml/liter with values of 1.97, 3.21, 5.67 and 10.56% , during the 2nd, 3rd, 4th and 5th week after pollination, respectively.

Protection percentage reached its maximum during the study period with the concentration of 6 ml/liter.