Population dynamic of Aphis gossypii and Its associated ladybird beetle on sunflower genotypes at Swabi district
Saddam Hussain, Zafrullah Khan, Noor Muhammad, Muhammad Kashif, Saifullah Khan and Babar Akbar
The present experiment was conducted during 2015 to study the population trend of Aphis gossypii and its associated ladybird beetle on sunflower genotypes at district Swabi from 21st March to 26th April. Randomize Complete Block Design (RCBD) was used with four replications. Four genotypes (SFA 13003, SFA 13007, SFA 13011 and SFA 13015) of sunflower were used for experiment. The data was recorded on terminal leaves per ten plants per plot for A. gossypii and ladybird beetles at weekly interval. The results indicated that genotype SFA 13003 was severely infested (5.64 %) by A. gossypii while lower infestation (2.02 %) was observed in genotype SFA 13011. However infestation was higher (8.80%) during the second week on the genotype SFA 13003. The population of seven spotted beetle were higher (1.2%) on genotype SFA 13015 and lowest (0.52%) in genotype SFA 13011. In case of time interval the number of seven spotted beetle was higher during 1st three weeks (1.08%) of growth while it decreased (0.17%) later on. Population of zigzag beetle was higher (1.16%) on SFA 13015 and lowest (0.63%) on SFA 13003. Similarly at early stage of crop growth population of zigzag beetle was higher as compare to late stages of crop growth. Population of bromus was higher (0.82%) on SFA 13015 and the highest (0.79%) in the 3rd week of crop growth while it decreased (0.09%) with up to 6th week of crop stage. It was concluded that A. gossypii attack was higher on SFA 13007 and the natural predators of A. gossypii were seven spotted beetle, zigzag beetle and bromus in experimental area.
Saddam Hussain, Zafrullah Khan, Noor Muhammad, Muhammad Kashif, Saifullah Khan, Babar Akbar. Population dynamic of Aphis gossypii and Its associated ladybird beetle on sunflower genotypes at Swabi district. J Entomol Zool Stud 2017;5(4):1840-1843.