The effect of droplets distribution of insecticides on bioresidual activity of piercing sucking insects (Hemiptera)‎ infesting eggplant by using ground spraying equipment

Abstract EN

Eggplant is one of the most common tropical vegetables cultivated of the world.

It contains a good amount of vitamins, minerals and fiber in few calories.

Piercing and sucking insects (Hemiptera) damage crops by inserting their mouthparts into plant tissue and sucking juices.

Heavily infested crops become yellow, wilted, deformed or stunted and may eventually die.

Some sucking insects inject toxic materials into the plant while feeding and some transmit virus diseases.

Field experiments were carried out in an area of about 19 Kirats planted with eggplant varity (Soma kafear) during two successive seasons 2017 and 2018 in 7th August at Qaha, Qalyubiya Governorate.

The selected area was split into 9 plots and control plots.

Three products were sprayed Imidaclopride, Acetampirid (Neonicotinoids) and Lufenuron (IGRs) of recommended dose rates and one treatment left without spraying as control by using Knapsack motor sprayer (Cifarilli) (20 L./ fed.), Economy Micron ULVA sprayer (15 L/Fed.) and Hand-Held compression sprayer (Kwazar) (94 L/Fed.).

Data indicated that, all tested compounds induced significant negative influenced on both Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) and Aphis gossypii Glover (Hemiptera: Aphididae) nymphs survival.

Both Imidaclopride and Acetampirid revealed successful results followed by Lufenuron.

It could be recommended that using those compounds with low volume spraying equipment with not less than (15L/ fed.).

The data showed that Knapsack motor sprayer (Cifarilli) was the best equipment to control both B.

tabaci and A.gossypii infesting eggplant.

The rate of performance of Knapsack motor sprayer (Cifarilli) was 12 fed./day.

It was the best equipment, but the lowest rate of performance was Hand Held compression sprayer (Kwazar) since it could spraying only 2.5 fed./day.