POPULATION DENSITY OF CERTAIN EARLY COTTON SEASON INSECTS AND ASSOCIATED PREDATORS AS INFLUNCED BY SEED TREATMENTS | ||||
| Journal of Plant Protection and Pathology | ||||
| Article 7, Volume 31, Issue 11, November 2006, Page 7423-7434 PDF (3.23 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jppp.2006.235346 | ||||
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| Author | ||||
| Jehan B. EI-Naggar, | ||||
| Plant Protection Res. Inst., ARC, Dokki, Giza | ||||
| Abstract | ||||
| Field experiments were conduced during 2004 and 2005 cotton growing seasons at Sakha Agricultural Research Station Farm to evaluate the effect of Gaucho and Cruiser as seed treatments at recommended and half rate as well as their mixtures with the fungicide, Rizolex~T against the thrips. Thr/ps fabac/ (Lind) and the cotton aphid, Aph/s gossypi‘i tC-lov ) at early cotton season, The obtained results revealed that Gaucho and Cruiser at recommended rate were effective against both thrips and aphids for 7 weeks after planting. The reduction percentage in thrips populatior was 78.4 and .72 1% , respectively in the first season and 69 5 and 63 4% ,respechtely in the second one. while the effect on apnids was 77' 8 and 60 % reduction ,respectively in the first season and 71 8 and 58 7% reduction, respectively in the second one, The effect of the two tested insecticides decreased with the decline of their rates and / or mixing with the fungicide, Rizolex-T The data also, indicated that the tested insecticides had low toxic effect on the population densrty cf assooated predators On the other hand, the fungiCIde; Rizolex-T alone had significantly the lowest effect on the population of the two insects as well as the predators Thus. it should not mixed the two insecticides ( Gaucho and Cruiser ) with the fungiCide Rizolex-T as cotton seed treatments against the two sucking pests at early cotton season, | ||||
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