Abstract:

The author did a migratory simulation experiment affecting the citrus Psylla aim to investigate whether cutting or pruning trees with disease will affect the orchard on both sides of the road or the orchard near the village storing branches with disease in the process of short-distance transportation of the branches with disease other than driving the Psylla with disease to the healthy trees nearby under the condition of failing to kill the citrus Psylla effectively. The result shows that when cutting the trees with disease in winter, the flying-away rate of adult Psylla is 30.2%; However, pruning branches in winter and after dragging the branches some distance away and then throw them into the vehicle, the Psylla adult migratory rate was only 47.4% while in autumn the rate is 31.8% and summer, 44.8%. The adult Psylla citrus will fly away completely until the leaves dry and fall off from the tree. The lower the temperature, the lower the flying-away rate. Transporting the branches with disease in short distance will affect the orchard on both sides of the road and the orchard near the village storing branches with disease. Therefore, before cutting or digging diseased trees, the citrus Psylla should be killed thoroughly.