Study on Parthenogenesis on Cotton Mealybug

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<p>Study on Parthenogenesis in Cotton Mealy Bug (Phenacoccus solenopsis) solenopsis)Presented by:Umair Faheem M.Sc.(Hons.) Agri. Entomology</p> <p>IPM Station (PARC), U.C.A., B.Z. University, Multan</p> <p>1</p> <p>Introduction: Cotton</p> <p>mealy bug has emerged as one of the most important pest of cotton and other plants of economic importance. It is mainly controlled by the application of insecticides which are highly toxic to the nonnon-target organisms. There was a debate among the scientists about the parthenogenesis in mealy bug.</p> <p>IPM Station (PARC), U.C.A., B.Z. University, Multan</p> <p>2</p> <p>Objectives: Monitoring</p> <p>of parthenogenesis in cotton mealy bug on two different hosts. of two different hosts on the biology of cotton mealy bug.</p> <p> Effect</p> <p>IPM Station (PARC), U.C.A., B.Z. University, Multan</p> <p>3</p> <p>Materials and Methods:</p> <p>HostsCotton China rose</p> <p>Crawlers were reared individually leaves of each host in Petri dish containing moist filter paper at the bottom under control conditions. Insects were observed daily under microscope.</p> <p>IPM Station (PARC), U.C.A., B.Z. University, Multan</p> <p>4</p> <p>Materials and MethodsMethodsII: Data</p> <p>of longevity, Sex ratio and fertility was taken after 24 hrs interval. of the 3rd instar females were provided males.</p> <p> Half</p> <p>IPM Station (PARC), U.C.A., B.Z. University, Multan</p> <p>5</p> <p>Providing moisture to avoid leaf desiccation</p> <p>Petri dishes having crawlers of mealy bug</p> <p>Cotton mealy bug pupae on China rose leaf</p> <p>IPM Station (PARC), U.C.A., B.Z. University, Multan</p> <p>6</p> <p>Results and Discussion:Egg 1st Instar5.34 a</p> <p>2nd Instar5.69 b</p> <p>3rd Instar25.44 a</p> <p>Pupae</p> <p>Adult Male-</p> <p>Total</p> <p>Fertilized Female</p> <p>1.92 b</p> <p>-</p> <p>38.39 a</p> <p>Cotto n</p> <p>Unfertilized Female Male</p> <p>-</p> <p>4.69 c</p> <p>6.86 a</p> <p>20.46 b</p> <p>-</p> <p>-</p> <p>33.90 b</p> <p>2.01 ab</p> <p>5.22 a</p> <p>5.54 c</p> <p>-</p> <p>6.96 ns</p> <p>2.11 ns</p> <p>21.84 c</p> <p>Fertilized Female</p> <p>1.79 c</p> <p>5.14 ab</p> <p>5.42 d</p> <p>21.35 b</p> <p>-</p> <p>-</p> <p>33.70 b</p> <p>China Rose</p> <p>Unfertilized Female Male</p> <p>-</p> <p>4.62 c</p> <p>6.75 a</p> <p>19.25 b</p> <p>-</p> <p>-</p> <p>32.74 b</p> <p>2.06 a</p> <p>5.14 ab</p> <p>5.76 b</p> <p>-</p> <p>6.45 ns</p> <p>2.42 ns</p> <p>21.83 c</p> <p>IPM Station (PARC), U.C.A., B.Z. University, Multan</p> <p>7</p> <p>Results and Discussion-I: Discussion70 58 60 50 40 30 20 0 42 ale Female 53 47</p> <p>450 367 400 350 300 250 200 50 00 50nilCotton</p> <p>3 2</p> <p>Fertilized</p> <p>nilChina Rose</p> <p>0Cotton China ros</p> <p>0</p> <p>Sex Ratio</p> <p>Fecundity</p> <p>IPM Station (PARC), U.C.A., B.Z. University, Multan</p> <p>nfertilized</p> <p>8</p> <p>Conclusion: There</p> <p>is no parthenogenesis in Cotton mealy bug. Experimentation is needed on male capturing techniques of Cotton mealy bug for its environment friendly management.</p> <p>IPM Station (PARC), U.C.A., B.Z. University, Multan</p> <p>9</p> <p>IPM Station (PARC), U.C.A., B.Z. University, Multan</p> <p>10</p>