Some Biological Aspects Of Carpocoris coreanus Distant (Hemiptera: Pentatomidae) In Kurdistan Region-Iraq

Abstract

The biological study of Carpocoris coreanus Distant carried out in March 2011 on wild mustard Brassica nigra (L.) at 25 Cº and 33% R.H. It has been found that the overwintered adult in the hibernated region of stink bug C. coreanus began their activity in the March of 2011, which overwinters inside the adult stage. The mean period of pre-oviposition, oviposition and post-oviposition were reached 8.2, 34.8 and 4 days, respectively. The average of adult longevity on mustard was 37.2 days for male and 46.6 days for female. The egg is barrel, brownish when newly laid, usually deposited in masses egg mass number of C. coreanus in this study averaged 8 masses/female, with an average 15.7 eggs/mass. The mean incubation period was 12 days, and egg hatching ratio approached 79.4%. The nymphs completed their development within five instars, with the mean period of 6.5±0.83, 7.8±1.15, 7.3±0.66, 9.3±0.66 and 12.8±0.96 days for the 1st, 2nd, 3rd, 4th and 5th nympal instars, respectively. It was found that stink bug C. coreanus has one generation per year.

Keywords

• Sunn bug
• egg
• nymph
• developmental time