Studies On The Biological Characteristics And Chemical Control Of Phenacoccus Solenopsis Tinsley

This paper studies the different temperatures (18℃,22℃,25℃,28℃,30℃) and host plant conditions, Phenacoccus Solenopsis Tinsley biological morphological characteristics, the extraction of crude fat,The development rate increased with the rising of temperature in the range of 18～30℃The survival rates of egg to adult survival increased with temperature increased. When the temperature exceeds 32℃, the survival rate of all instars reduced, Optimal temperature for Phenacoccus Solenopsis Tinsley development and reproduction are between 25～28℃, A field survey found that population dynamics varies during the sesons from june to November, with population reaching the first peak in the mid-july then in the mid-August declining,and the reaching the second peak in the mid-September Phenacoccus solenopsis Tinsleys'fecundity and the relationship between the number of days,then the 3st instar nymphs of 60, the3st instar nymphs molt into adults, adults through the anatomy, statistics, adult fecundity. The results show that adult fecundity increased with the increased in the number of days, and increased to a peak, with the number of days decreases. Chemical control test results showed that 1500 times with 4.5% and 2.5% cypermethrin cypermethrin spraying carried out 1000 times, these two agents on cotton hibiscus mealybug nymphs and adults are fairly obvious effect,800 times 80% dichlorvos; best prevention for adults, and less expensive, more desirable. Phenacoccus solenopsis Tinsley in different hosts on the extraction of crude fat, The results show that Phenacoccus solenopsis Tinsley hibiscus hosts conditions in different fat content of different, On the fat content in cocklebur up to 12.4%, the content in Lotus spend 5.9% in cotton F268 least 4.9%. Phenacoccus Solenopsis Tinsley indoor hibiscus life table studies have shown that The population death rate peaks in the 1st instar and 2st instar stage, The emergence of the peak population mortality and biological characteristics with temperature, Age 1 in the adult, the highest rate of parasitism, almost 80%, Other parasitic rates of almost all instars, mostly in the 60 to 70%.