Survival, development and reproduction of Phenacoccus solenopsis (Hemiptera: Pseudococcidae) on kaolin-treated cotton

Abstract

The mealybug, Phenacoccus solenopsis Tinsley (Hemiptera: Pseudococcidae) is a cotton pest widespread in several cotton growing regions of Brazil, particularly in the semi-arid region of southwestern Bahia. The impact of kaolin on survival, development and reproduction of P. solenopsis was evaluated in the laboratory. The experiment was developed in a completely randomized design with two treatments: immature or newly emerged adults of P. solenopsis sprayed with kaolin and fed with cotton leaf discs treated with kaolin suspension (with kaolin) (T1) and immature or newly emerged adults of P. solenopsis sprayed with distilled water and fed with cotton leaf discs treated with distilled water (without kaolin) (T2). The kaolin suspension shortens the life cycle, increases the reproductive potential and population growth of the cotton mealybug, P. solenopsis and, therefore, it should be used with caution on cotton plants in regions with a history of occurrence of this pest.

Biology, ecology, and management of cotton mealybug Phenacoccus solenopsisTinsley (Hemiptera: Pseudococcidae)

“…128 A kaolin suspension reduced the life cycle of the pest. 129 Insecticides with a hormoligotic effect have been documented in P. solenopsis. Pyriproxyfen and lufenuron increased the fecundity and longevity of P. solenopsis at sublethal doses.…”

Monitoring of Insecticides resistance against cotton Jassid (Amrasca biguttutla biguttutla) under laboratory conditions

“…The cotton crop of different areas is an efficiently vital fibrous crop of Pakistan (Rehman et al, 2016). Many factors like floods, heavy monsoon, infestation of sucking insect pests and cotton leaf curl virus (CLCV) disease have resulted a decline in 13.4% of cotton area during the years 2010-11 (Bakhsh et al, 2019;Egler et al, 2012;Guedes et al, 2020).…”

Susceptibility of Alabama argillacea and Chrysodeixis includens (Lepidoptera: Noctuidae) larvae to Beauveria bassiana associated with kaolin

“…The use of kaolin particle film technology can improve the efficiency of insecticides to controlling cotton pests (Silva and Ramalho, 2013), including aphids, boll weevils, cotton leafworms, pink larvae and white flies, as well as the cotton bollworm complex and those of the genus Spodoptera (Neves et al, 2014;Gonçalves et al, 2015). The film of kaolin particles, sprayed on the surface of the host plants, creates a physical or mechanical barrier that can alter plant tissue taste and digestibility, reducing the feeding and survival of chewing insects (Gonçalves et al, 2015;Guedes et al, 2020). Kaolin may affect the insect cuticle permeability to water, a limiting factor for these organisms (Cook et al, 2008).…”