HAFEZ, A., SHALABY, F., KARES, E., EBAID, G. (2003). LABORATORY AND FIELD STUDIES TO DETERMINE THE EFFECT OF A BIOCIDE (DELFIN) AND AN INSECT GROWTH REGULATOR (CONSULT) ON THE PINK BORER SESAMIA CRETICA LED. AND CERTAIN NATURAL ENEMIES IN MAIZE FIELDS IN EGYPT.. Egyptian Journal of Agricultural Research, 81(3), 1035-1054. doi: 10.21608/ejar.2003.281683
ADEL A. HAFEZ; FAWZY F. SHALABY; ESMAT A. KARES; GORG H. EBAID. "LABORATORY AND FIELD STUDIES TO DETERMINE THE EFFECT OF A BIOCIDE (DELFIN) AND AN INSECT GROWTH REGULATOR (CONSULT) ON THE PINK BORER SESAMIA CRETICA LED. AND CERTAIN NATURAL ENEMIES IN MAIZE FIELDS IN EGYPT.". Egyptian Journal of Agricultural Research, 81, 3, 2003, 1035-1054. doi: 10.21608/ejar.2003.281683
HAFEZ, A., SHALABY, F., KARES, E., EBAID, G. (2003). 'LABORATORY AND FIELD STUDIES TO DETERMINE THE EFFECT OF A BIOCIDE (DELFIN) AND AN INSECT GROWTH REGULATOR (CONSULT) ON THE PINK BORER SESAMIA CRETICA LED. AND CERTAIN NATURAL ENEMIES IN MAIZE FIELDS IN EGYPT.', Egyptian Journal of Agricultural Research, 81(3), pp. 1035-1054. doi: 10.21608/ejar.2003.281683
HAFEZ, A., SHALABY, F., KARES, E., EBAID, G. LABORATORY AND FIELD STUDIES TO DETERMINE THE EFFECT OF A BIOCIDE (DELFIN) AND AN INSECT GROWTH REGULATOR (CONSULT) ON THE PINK BORER SESAMIA CRETICA LED. AND CERTAIN NATURAL ENEMIES IN MAIZE FIELDS IN EGYPT.. Egyptian Journal of Agricultural Research, 2003; 81(3): 1035-1054. doi: 10.21608/ejar.2003.281683
LABORATORY AND FIELD STUDIES TO DETERMINE THE EFFECT OF A BIOCIDE (DELFIN) AND AN INSECT GROWTH REGULATOR (CONSULT) ON THE PINK BORER SESAMIA CRETICA LED. AND CERTAIN NATURAL ENEMIES IN MAIZE FIELDS IN EGYPT.
1Plant Protection Department, Faculty of Agriculture, Moshtohor, Zagazig University, Egypt
2Plant Protection Research Institute, Agricultural Research Centre, Dokki, Giza, Egypt
Abstract
The efficacy of Delfin (a commercial product of Bacillus thuringiensis and Consult (an insect growth regulator) on the 1st instar larvae of Sesamla cretica was studied. The LC50 value after 48 hours from Del-fin treatment was 5.2 x 104 S.U. this value was 72 p.p.m., 24 hours after treatment of Consult. A negative relationship was found between the applied concentration of Delfin, Consult and LT50 values where it shortened by increase of applied concentrations. A program was followed in the field on (16 experimental plots) of early maize cultivation of 1998 and 1999 maize season that received 3 treatments and control of 4 replicates each. The treatments were Delfin + 1% NaCI, Delfin (0 525 kg / feddan) and Consult (200 mt / fedden). All treatments were applied 20 days after sowing. Such treatments induced % reductions in the numbers of perforated leaves due to S. cretica larval feeding by 66.51, 64.74 and 42.59 % In 1998 and by 38.84, 26.85 and 28.51 % in 1999 for the three treatments, respectively. In addition reduced the mean larval counts /10 infested plants and caused % reduction than control by 47.39, 40.62 and 21.88 % in 1998 and by 27.01, 20.11 and 13.79 % in 1999 for the three treatments, respectively. Spraying maize by Delfin or Delfin + 1% NaCI had no effect on parasitization of Platytelenomus hylas (an egg parasitoid) or on Apanteles sp., Bracon breyicornis and Meteorus rubens (three larval parasitoids). Consult treatment caused significant reduction in the percentages of parasitism by P. hylas and also no parasitized S. cretica larvae was detected in this treatment.
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