Variations in the Susceptibility of some Potato (Solanum tuberosum L.) Cultivars to Infestation with Certain Piercing Sucking Insect Pests

Abstract

Potato (Solanum tuberosum L.) is an economically important vegetable crop all over the world. The piercing sucking insect pests are serious pests threatening potato plantations in many countries. The present investigation contributes to the knowledge in the susceptibility of certain potato cultivars to infestation with these insects in Beheira Governorate, Egypt. Five global potato cultivars currently used in Egypt's potato production were evaluated through two successive seasons (summer plantations) in field experiments for their susceptibility to sucking insect infestation. The experiment was designed in a completely randomized block design and all data were analyzed using the SAS® program. None of the tested potato cultivars was immune or highly resistant to the tested insect pests. The cultivars Banba and Diamante were found quite resistance to piercing sucking insect pests. The cultivar Herms was found as moderately susceptible while Spunta and Cara were found to be the most susceptible cultivars. The green lacewing, Chrysoperla carnea; seven-spotted lady beetle, Coccinella septempunctata; eleven spotted lady beetle, Coccinella undecimpunctata and the pirate bug, Orius sp are the most important predators which associated with the sucking insects pests on the potato cultivars.

Change of the Density-Independent and Dependent Environmental Factors on The Population Dynamics of Bemisia tabaci and Empoasca fabae Under the Potato Agroecosystem

“…and potato leaf hopper, E. discipiens (Paoli) were among the sucking insect pests that attacked potato plants from the time seedlings initially emerged until harvest time. Also, it agrees with the result of (Darwish, 2018;Mogahed & Abdelmaksoud, 2016) who found that the mean number of whiteflies and the intensity of the potato leafhopper population were higher than the thrips or aphid populations. According to (DeLong, 1938;Poos & Smith, 1931) reports, this leafhopper prefers the potato as an oviposition host plant.…”

“…were the most important predators in the potato plants and the green lacewing numbers were found in more than that other predator. that was in agreement with (Darwish, 2018;Sherief et al, 2013) but in contrast to (Hamouda et al, 1993) who revealed that the presence of coccinellid predator species more Abundant than that of chrysopid predators in vegetable fields. The results coincidence with (Abdel-Gawaad et al, 1990) who showed that Coccinella undecimpunctata was noticed fed on Bemisia tabaci's immature stages, Late in the year, Chrysopa carnea (Chrysoperla carnea) larvae were observed feeding mostly on B. tabaci pupae on a variety of host plants, and solitary parasitoids Eretmocerus mundus were observed emerging from both larvae and pupae.…”

Reproductive and population parameters of Empoasca decipiens Paoli (Hemiptera: Cicadellidae) on different host plants

“…The nymphs and adults of E. decipiens suck the plant sap by using its piercing-sucking mouthparts, injects it toxic saliva into leaves and cause Phytotoxicity (phytotoxic symptoms). Feeding injury of E. decipiens can result in discoloration, sometimes called "hopper burn" and consequently yield loss (Nault and Ammar 1989, Atwal and Singh 1990, Singh et al 2008, Mahmoud et al 2011, Khalafallah et al 2015, Darwish 2018). The green leafhopper usually colonized on the leaves undersurface of its plant hosts.…”