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English :
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Evaluation the efficacy of two insects growth regulators (IGRS)against Egyptian cotton leafworm, spodoptera littoralis and their latent effect of the pupation and the daily rate of consumed food.
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Arabic :
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تقدير كفاءة أثنين من منظمات النمو الحشرية على دودة ورق قطن المصرية وكذلك دراسة التأثير المتأخر على نسبة التعذير وعلى المعدل اليومي من الغذاء المستهلك
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| Abstract |
Two insect growth regulators (IGRs), diflubenzuron and lufenuron were tested against cotton leafworm Spodoptera littoralis at Sakha Lab-field by feeding the 2"°, and 4`" instar larvae on treated cotton leaves for 48 hrs and untreated leaves till pupation for four indicated intervals (zero, 7, 14, 21 days treatment). Also, the effecting of these compounds on the daily rate of consumed food by the, 4`h, 50', and 6'h instar larvae was recorded.
The results showed the following:
1. The tested compounds were highly effective at 0-time interval (initial kill after 5 days post-treatment) recording 95 and 99 % mortality with diflubenzuron and lufenuron respectively on the 2"° instar larvae, while the percent mortality were 91 and 97 on the 4`" instar larvae.
2. The tested compounds could be arranged according their residual effect (7 - 21 days post treatmen~ in descending order as follows, diflubenzuron (78 %) and (79.3 °k) on the 2"d and 4 instar larvae respectively and lufenuron (97.6 %) and (87.6 %) on the 2"d and the 4"' instar larvae.
3. Diflubenzuron induced zero % pupation on the 2"° instar larvae and 11.1 % on the 4"' instar larvae, while lufenuron induced zero % pupation with the two instar larvae comparing with control, where the percent pupation were 91.7 % and 89.5 % with the 2"° and the 4`" instar larvae.
4. l.ufenuron was the highest effective toxicant, where it prevented the larvae to reach pupal stage for 7 and 14 days post treatment.
5. Significant differences were recorded between control and other treatments in the daily rate of consumed food treated with diflubenzuron and lufenuron by the 4`", 5`", and 60' instar larvae.
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| Publication year |
2006
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| Pages |
3947-3955
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| Availability location |
معهد بحوث وقاية النباتات--7ش نادى الصيد--الدقى - الجيزة
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| Availability number |
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| Organization Name |
Plant Protection Research Institute (PPRI)
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| City |
المنصورة
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| serial title |
مجلة جامعه المنصورة للعلوم الزراعية
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| ISSN |
1110-0346
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| Author(s) from ARC |
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| Agris Categories |
Protection of plants - General aspects
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AGROVOC
TERMS |
Diet.
Diflubenzuron.
Feeding.
Insect growth regulators.
Larvae.
Mortality.
Residual effects.
Spodoptera littoralis.
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| Publication Type |
Journal
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