Toxicity assessment of certain insecticides on the red soft scale insect, Pulvinaria tenuivalvata (Newstead) infesting sugarcane plants

Abstract

Pulvinaria tenuivalvata (Newstead) (Hemiptera: Coccidae) red soft scale insect is one of the most prevalent insect pests that attacks sugarcane plants. Insecticidal efficiency of six selected insecticides (Malatox, Sulfar, Admiral, Nomolt, Tafaban and Biover) was evaluated for their impact against nymphs and adult females of P. tenuivalvata on sugarcane leaves using leave dipping methods. This investigation was carried out for two successive seasons (July 2021-2022) at the laboratory of the Plant Protection Research Department at the El-Mattana Agricultural Research Station, Luxor Governorate, Egypt. Obtained results showed that the tested insecticides varied in efficacy on the different stages of pest (nymphs and adult females). Moreover, the nymphal stage of P.tenuivalvata was more susceptible to the tested pesticides compared to the adult stage. Admiral and nomolt were the most toxic against the nymphal and adult female stages of P. tenuivalvata on sugarcane leaves, sulfar, however, was the least successful in controlling this pest.

Design and synthesis of novel N, N′-substituted benzamide derivatives as potential insecticidal agents against the white mango scale insect, Aulacaspis tubercularis (Hemiptera: Diaspididae)

“…Under the laboratory conditions at Agricultural Research Station, plant protection department in El-Mattana, Esna district, Luxor Governorate, the toxicological effectiveness of the all target synthetic components were evaluated via the mango leaf dipping techniques under the laboratory environments. [19][20][21][22][23][24][25][26][27][28] Concentrations of each compounds derivatives & 0.11% tween-80 used like surfactant. Only 50 A. tubercularis nymphs and 50 adults females were dipping for ten second in each concentration of prepared components (repeat 3 times).…”

Green synthesis and bioefficacy screening of new insect growth regulators as eco‐friendly insecticides against the cotton mealybug Phenacoccus solenopsis

“…Under the laboratory conditions at Agricultural Research Station, plant protection department in El-Mattana, Esna district, Luxor Governorate, the toxicological effectiveness of the all target synthetic compounds were evaluated via the okra leaf dipping techniques under the laboratory environments. [12][13][14][15][16][17][18][19][20] 5 Concentrations of each compounds derivatives & 0.11 % tween-80 used like surfactant. Only 50 adults female and 50 nymphs of P. solenopsis insects were dipping for ten second in every concentration of prepared components (repeat 3 times).…”