scholarly journals Effect of Certain Ecological and Agro Techniques on the Incidence of Pink Bollworm, Pectinophora gossypiella (Lepidoptera: Gelechidae) and Spiny Bollworm, Earias Insulana, (Lepidoptera: Noctuidae); on Cotton Plants

2014 ◽  
Vol 35 (January-March) ◽  
pp. 29-38
Keyword(s):  
Pink Bollworm ◽  
Pectinophora Gossypiella ◽  
Earias Insulana ◽  
Spiny Bollworm ◽  
Cotton Plants ◽  
Lepidoptera Noctuidae

scholarly journals Influence of some insecticide sequences on the injurious insect- pests of cotton plants

2019 ◽  
Vol 43 (1) ◽  
Author(s):  
Seham M. Ismail
Keyword(s):  
Yield Loss ◽  
Insect Pests ◽  
Economic Loss ◽  
The Other ◽  
Loss Reduction ◽  
Cotton Yield ◽  
Earias Insulana ◽  
Resistance Development ◽  
Spiny Bollworm ◽  
Cotton Plants

Abstract Background Cotton growers in Egypt have experienced severe economic loss from cotton bollworms, especially the pink bollworm, Pectinophora gossypiella (Saund.), and spiny bollworm, Earias insulana (Boisd.), so a field experiment was carried out to determine efficiency of eight insecticides in their seven sequence programs to evaluate the best solution for cotton bollworms problems, during two successive seasons. Results The highest reduction percentages are effective sequences 7 and 5 (gave about 90% infestation reduction) were started and mediated with new insecticides, and when started and mediated with spinosad, or with cypermethrin, sequences 2 and 3 (gave about 86%) respectively, also, the repetition of the same insecticide twice in a regimen might increase, might decrease, or has no effect on the insecticide efficiency against cotton bollworms. The tested sequence programs showed high protection for green bolls with protection percentages ranged from 66.1 and 67.2% (sequence 1) to 92.6 and 94.1% (sequence 7) during two seasons respectively. On the other hand, the superiority in yield loss reduction can arrange in the following descending order: sequences 7, 5, 2, 3, 6, 4, and 1 respectively. Conclusions From this study, it can be concluded that the importance of sequence insecticide programs included new groups of insecticides to directing tactics to fight against resistance development and used this sequence programs to restore susceptibility for conventional insecticides. This study devoted to obtaining the optimum regimen of insecticides that give low reduction of cotton bollworms’ infestation and high cotton yield.

Sign in / Sign up

Export Citation Format

Share Document