M. A. Al-Helal, K. N. Ahmed, N-E-P. Khanom, and S. Bulbul 

Observations on papaya mealybug, Paracoccus marginatus Williams & Willink (Hemiptera : Pseudococcidae) damag-ing some crops in Bangladesh
...enerally, three and four nymphal instars occur in case of female and male mealybug, respectively. The adults are most active in warm, dry and humid weather. The male adult mealybugs possess two pairs of wings. Female have no wings and move by crawling short distances or by being blown in air currents. Female usually lays 100 to 600 eggs. Eggs are greenish-yellow in colour measuring 0.120 cm diameter and laid in an ovisac that 3-4 times the body length. Eggs ar...

Muhammad Farhan1, Ghulam Murtaza1, Muhammad Ramzan2, Muhammad Waqar Sabir3, Muhammad Arsalan Rafique2, Saif Ullah

...rnea larvae on different nymphal instars of Myzus persicae was investigated in ambient laboratory conditions at University of Agriculture, Faisalabad. Chrysoperla carnea was found very active and consumed all stages of aphid. The predation rate of Chrysoperla carnea was increased with increase in larval instars (1st to 3rd). Third instar of Chrysoperla carnea was very voracious feeder and fed large number of aphid instars nymphs (1st, 2nd and 3rd). The larval ...

Journal of Innovative Sciences

December

Vol. 6, Iss. 2, Pages 77-235

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