EVALUATION OF SOME COWPEA GENOTYPE~ TO INFESTATION OF CERTAIN PIERCING SUCKING INSECTS AND COTTON LEAFWORM IN KAFR EL-SHEIKH REGIQN | ||||
| Journal of Plant Protection and Pathology | ||||
| Article 2, Volume 28, Issue 11, November 2003, Page 6895-6904 PDF (1.34 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jppp.2003.246311 | ||||
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| Authors | ||||
| G. A. EI-Mezayyen,1; A. M. Nassef1; R. M. Y. Helal2; R. A. Abou-Aiana1 | ||||
| 1Agric. Res. Center, Plant Protect. Res. Inst., Sakha Agric. Res. St | ||||
| 2Entomology Dept. Fac. of Agrlc. Kafr EI-Shelkh, Tanta University | ||||
| Abstract | ||||
| The study was conducted at the experimental fann of Ihe Faculty of Agriculture, Kafr EI-Sheikh. Experiments were carried out on different geno pes of cowpea In two summer plantations, being 2001 and 2002. Results showed one to three peaks of A crecdvote, 8. labaci, Empoasca spp., N. viridula and S. littoralis were recorded on the different genotypes of cowpea during July, August and September in the two successive seasons. The genotype (It 92 KD·357-2) harboured the highest population of beneficial arthropods and ~ad the least infestation with Acraccivora and S. littora/is in both seasons. Statistical analysis indicates highly significant positive correlation (r = 0.45) between Chrysoperla eamea and 8. I8baci (adult) populations while it was insignificant between C. camea and the remaining insect species in 2001 season. In 2002 season significant negative correlation (r = .0.38) between C. camea and A. cracciVora was recorded while it was insignificant between the predator and the remaining insects. Results indicated that (It 95 K·2011·11) and (It 82·E·16) genotypes were less infested with the cowpea aphid, Aphis craccivora Koch., while (It Brown) ge~otype was more favourable to infestation. The genotypes (It 83.-911) and (It 86q-880) attracted high numbers of the adults of cotton whitefly, 8emisia labaci (Gann.), but (It 98 K·573-3) and AzmerJy were the least infested one. Genotypes (It 95m.120) and (It 66 F·2062·5) harbored the least numbers of [assids: Empoasca spp., while (It Brown) and (It 85k-105·2) genotypes were the most susceptible to infestation with the ~reen stink bug; Nezara viridula (L.). The highest numbers of cotton leafworm; Spodoptera IUtoralis (Botsd.) were recorded on (It 840-448), while (It 95K-1088-4) genotype had the lowest infestation rates. | ||||
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