EL-HENEIDY, A., IBRAHIM, A., ALEZ, D., ABDEL-SALAM, N., ELLINGTON, J., MOAWAD, G. (1997). PEST-PREDATOR INTERACTIONS IN UNTREATED COTTON FIELDS AT THREE PLANT GROWTH STAGES. 2- PLANTING DATE IMPACT. Egyptian Journal of Agricultural Research, 75(1), 1373-155. doi: 10.21608/ejar.1997.403174
AHMED H. EL-HENEIDY; AMIRA A. IBRAHIM; D. GONZ ALEZ; NABIL M. ABDEL-SALAM; J. ELLINGTON ELLINGTON; GALAL M. MOAWAD. "PEST-PREDATOR INTERACTIONS IN UNTREATED COTTON FIELDS AT THREE PLANT GROWTH STAGES. 2- PLANTING DATE IMPACT". Egyptian Journal of Agricultural Research, 75, 1, 1997, 1373-155. doi: 10.21608/ejar.1997.403174
EL-HENEIDY, A., IBRAHIM, A., ALEZ, D., ABDEL-SALAM, N., ELLINGTON, J., MOAWAD, G. (1997). 'PEST-PREDATOR INTERACTIONS IN UNTREATED COTTON FIELDS AT THREE PLANT GROWTH STAGES. 2- PLANTING DATE IMPACT', Egyptian Journal of Agricultural Research, 75(1), pp. 1373-155. doi: 10.21608/ejar.1997.403174
EL-HENEIDY, A., IBRAHIM, A., ALEZ, D., ABDEL-SALAM, N., ELLINGTON, J., MOAWAD, G. PEST-PREDATOR INTERACTIONS IN UNTREATED COTTON FIELDS AT THREE PLANT GROWTH STAGES. 2- PLANTING DATE IMPACT. Egyptian Journal of Agricultural Research, 1997; 75(1): 1373-155. doi: 10.21608/ejar.1997.403174
PEST-PREDATOR INTERACTIONS IN UNTREATED COTTON FIELDS AT THREE PLANT GROWTH STAGES. 2- PLANTING DATE IMPACT
1Plant protection Research Institute, Agricultural Research Centre, Dokki, Giza, Egypt
2University of California, Riverside, CA, USA.
3New Mexico State University, Las Cruses, NM, USA.
Abstract
Impact of planting dates in different agro-ecosystems on pest-predator interactions in untreated cotton fields at three plant growth stages; Plant Establishment (PE), Fruit Formation (FF) and Fruit Maturation (FM) was studied in Egypt at Mallawi and Sakha Research stations in the two successive cotton seasons 1992 and 1993. Direct counts of pests and predators were taken weekly from the two planting dates/ location/season. Population of cotton pests and their associated predators was substantially different in the two areas and in the two planting dates; Early (E) and Late (L). Highest infestation rates by secondary pests were recorded in E and L plantings at Mallawi and Sakha, respectively in the two seasons. L plantings received higher populations of the key pests; CLW, SBW and PBW than the E plantings in the two locations and seasons except at Mallawi, 92 in case of the CLW. Generally, predators population was almost higher at sakha than at Mallawi as well as in the E plantings than the L ones in the two seasons. Highest population of predators was recorded during FF stage (by mid-season). Statistical analyses showed different significant interactions between most of predators and both secondary and primary insect pests of cotton during various plant growth stages. The interactions were obviously more significant at Sakha.
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