Effect of Variegation on Stem Exudates of Coleus and Life History Characteristics of Citrus Mealybug (Hemiptera: Pseudococcidae)

Effects of Selected Fertilizers on the Life History of Bemisia tabaci (Hemiptera: Aleyrodidae) Biotype B

“…This suggests that these plants allocated the few nutrients available to defensive mechanisms and is consistent with the Þndings of Inbar et al (2001). Amino acids in the shikimic pathway have been previously correlated with the life histories of other phloem feeders, such as citrus mealybug, Planococcus citri (Risso), where development was delayed and adult fecundity was reduced as the proportion of shikimic amino acids increased in phloem sap (Sadof et al 2003). In addition, the intrinsic rate of increase of the English grain aphid, Sitobion avenae (F.), was negatively correlated with the concentrations of both hydroxamic acid and total phenolic compounds in winter wheat (Leszcznski et al 1989).…”

Novel Approaches for the Management of Mealybug Pests

“…citri. Sadof et al (2003) found that the life history characteristics of P. citri on Coleus blumei were not correlated with total amino acids and sucrose contents in stem exudates, and were correlated negatively with the proportions of shikimic acid precursors and positively with those of other nonessential amino acids. Hostplant characteristics can also influence the performance of the natural enemies of mealybugs (Serrano and Lapointe 2002;Souissi 1999;Souissi and LeRu 1997;Yang and Sadof 1997).…”

Laboratory Studies on the Development and Life Table Parameters of Planococcus citri (Risso) (Hemiptera, Pseudococcidae) at Different Temperatures

“…A female at 25 ºC produced 288 eggs in 8 day, which averaged 36 eggs per day. Fecundity of P. citri females reared at controlled temperature females fed on potato tubers compared with previous studies i.e Sadof et al (2003) indicated that fecundity of mealybugs reared on butternut squash in a growth chamber at 24 ± 2˚C, 60-70% RH, on green plants (175.65 eggs) was significantly lower than those on red-variegated plants (191.97 eggs) and numerically lower than those on yellowvariegated plants (181.29 eggs). Also, female mealybug, Maconellicoccus hirsutus, incubated at 30ºC produced a significantly lower number of eggs (103 eggs per female).…”