Bioefficacy of some biorational insecticides for the control of Aphis gossypii Glover, 1877, (Hemiptera: Aphididae) on greenhouse grown cucumber

Abstract

<p><em></em><em></em><em>Aphis gossypii</em> Glover, 1877 is a serious pest of cucumber in greenhouse plantings. Biorational insecticides are an alternative of broad spectrum insecticides for aphid suppression in greenhouse. In this regards, the efficiency of some biorational insecticides including soap based on coconut oil, surfactant based on sodium sulfosuccinate and antifeeding based on potassium nicotinate were assayed on <em>A</em>. <em>gossypii </em>in the cucumber greenhouse. The trials were set up in a randomized complete block design with four replications. Samplings were carried out one day before spraying and 3, 7, 14 and 21 days after spraying. The data were submitted to ANOVA and the means comparison was performed using Duncan’s test. The results indicated that the highest mortality in insecticidal soap, surfactant and antifeeding treatments occurred after 3 days, with 78.47 %, 67.16 % and 60.48 % mortality, respectively. The results of the trials are discussed in terms of improving management of the populations of <em>A</em>. <em>gossypii</em>.</p>

Effectiveness of Three Bio-Rational Products and a Traditional Insecticide against <i>Thrips</i> spp. and <i>Bemisia tabaci</i> Attacking Tomato Fields in Kafr El-Sheik Governorate, Egypt

“…The current results recommend that three consecutive spraying are necessary to achieve the best control. These findings highly corroborates the investigation of Emami [19] where he used four organically-farming insecticides, among which was the nimbecidine extract, and assured that applying the products for 3 times gave excellent control. Therefore, repeating applications may be necessary for better pest control [20].…”

Toxicity of mint and eucalyptus extracts and some chemical insecticides on black legume aphid, Aphis craccivora (Hemiptera: Aphididae) and its predator, Hippodamia variegata (Coleoptera: Coccinellidae)

“…Palizin performs better than mospilan in reducing eggs and nymphs pistachio psylla, A. pistaciae (Danaye-Tous and Farazmand 2014). Moreover, Emami (2016) showed that the best mortality rate in biorational pesticide treatments was obtained in three days, with a 78.5% mortality rate on the Aphis gossypi population. Previous research indicates that the effects of botanical pesticides like Palizin on the citrus black aphid, Toxoptera aurantii Boyer consist of79.75, 95.59, and 96.39% pest mortality rates at 24, 48, and 72 hours after treatment, respectively (Gholamzadeh-Chitgar and Pourmoradi 2017).…”