Integrated pest management of organically grown greenhouse tomatoes in Israel
1988
Berlinger, M.J. | Dahan, R. | Mordechi, S.
Winter tomatoes are planted in unheated greenhouses at the beginning of October and harvested from January to May. They are attacked by various pests, which develop in summer on outdoor crops, enter the greenhouses through the ventilation openings, and attack the young plants. In autumn, the most severe damage is caused by the tomato yellow leaf curl virus (TYLCV), which is transmitted solely by the tobacco whitefly. Serpentine leaf-miners and aphids enter the greenhouses as well. The aphids transmit the potato virus Y (PVY). In November the pests' immigration ceases. During winter, the indoor pest activity is at its lowest due to the low temperatures. During March the tomato russet mite and the carmine spider mite start to reproce more intensively, and their populations build up rapidly. During this experiment, pest immigration and virus transmission were prevented by planting under a covering, which completely replaces chemical control and thus allows bio-organic farming. Positive airpressure in the greenhouses also reduced pest immigration. When pest immigration ceased, the cover was removed. Leaf-miners, when present, were usually controlled by naturally occurring parasites. The carmine spider mite was controlled by introducing predatory mites, and the tomato russet mite by dusting sulphur, which allowed biocontrol.
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