A TRIAL FOR RATIONAL CHEMICAL CONTROL OF RED SPIDER MITE AND BEANFLY ATTACKING THREE VARIETIES OF THE BEAN PLANTS | ||||
| Egyptian Journal of Agricultural Research | ||||
| Article 5, Volume 88, Issue 1, March 2010, Page 49-67 PDF (415.4 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejar.2010.180211 | ||||
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| Author | ||||
| ATEF A. A. ABD –ALLAH | ||||
| Plant Protection Research Institute, Agricultural Research Center, Dokki, Giza, Egypt. | ||||
| Abstract | ||||
| The suitability feeding and tolerance of three varieties of Snap bean, (Phaseolus vulgaris L.) namely Giza 6, Paulista and Bronco to infestation with red spider mite, Tetranychus urticae (Koch) and beanfly, Ophiomyia phaseoli (Tryon) was studied. The efficacy of imidaclopride (Gaucho), and other three pesticides thiocyclam (Evisect), imidaclopride (pestidor) and bensultap (Bancol) against two previous pests were also investigated in Horticultural Research Station,El-Kassasein, Ismailia Governorate, during 2007 and 2008 seasons. The obtained results revealed that: 1. Giza 6 variety was the least feeding suitability leading to infestation with two pests where it was infested with the lowest populations of two pests and gave highest green pods yield, while Bronco was the least one. 2. Bensultap at recommended rate reduced the population of T. urticae and O. phaseoli on Giza 6 variety (treated and untreated with Gaucho) by (73.29 and 68.93) and (43.35 and 40.35) as general mean of % reduction (GR%) at 2007 season, respectively. Bensultap at 0.5 R,1 R and 1.5 R on Giza 6 variety induced good results at 2008 season also causing 51.73, 84.63 and 83.48 as (GR%) in population of mite and 59.3, 72.91 and 80.65 as (GR%) in mines of beanfly, respectively. Giza 6 variety treated with imidaclopride (Gaucho) and sprayed with bensultap produced the highest yield of green pods. 3. Thiocyclam and imidaclopride caused the lowest reduction in mite and beanfly populations attacking Bronco variety (untreated with Gaucho) which recording 24.67, 28.62(GR %) and 42.26, 30.73(GR %) in 2007 season, respectively. 4. Paulista variety came in the intermediate between Bronco and Giza 6 varieties to infestation with both T. urticae and O. phaseoli at two seasons. 5. Giza 6 variety harboured the highest populations of four natural enemies (C.septempunctata, Stethorus sp., Scolothrips longicorus and Phytoseiulus sp.) in both seasons which recorded total numbers 130 and 90 individuals for two seasons respectively, while Bronco variety harboured the lowest populations of four natural enemies for two seasons which recorded total numbers 92 and 58 individuals for two seasons, respectively. Therefore, Snap bean seeds treated with imidaclopride (Gaucho) and sprayed with the natural insecticide bensultap for producting succeed bean crop and reducing environmental pollution. | ||||
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