Resistência de genótipos de algodoeiro a Anthonomus grandis Boh., Frankliniella sp. e Aphis gossypii Glover

EFEITO DO DESLINTAMENTO QUÍMICO SOBRE A OCORRÊNCIA E DESENVOLVIMENTO DE Colletotrichum gossypii ASSOCIADO ÀS SEMENTES DE ALGODOEIRO*

Effects of chemical delinting on the level of occurrence and development of Colletotrichum gossypii associated with cotton seeds The present work was conducted in two phases. The first phase evaluated how the lenght of time of chemical delinting, 1:30 and 4:30 min, effected the level of infection by Colletotrichum gossypii on artificially inoculated cotton (Gossypium hirsutum) seeds. Non-delint...

Aphis gossypii

BIOLOGY/ECOLOGY Dispersal mechanisms Flight range of winged adults is very limited. Long-range dispersal of eggs, immature stages and adults is manmediated with the transport of infested plant material. Reproduction The taxonomic status of this alien aphid is problematic, and hence the interpretation of biological information is difficult. Moreover, different biotypes exhibiting host preference...

برآورد پارامترهای جدول زندگی باروری شته جالیز (Aphis gossypii Glover)

پارامترهای جدول زندگی باروری شته جالیز بر روی سه گیاه خیار، کدوتنبل و کدو مسمایی در شرایط آزمایشگاه با دمای 1±25 درجه سانتیگراد، رطوبت نسبی 5±75 درصد و دوره نوری 8 : 16 (تاریکی: روشنایی) بررسی گردید. به منظور محاسبه خطای استاندارد پارامترهای رشد جمعیت از روش جک‎نایف استفاده شد. نرخ خالص تولید مثل روی خیار، کدوتنبل و کدو مسمایی به ترتیب برابر با 806/7±789/76، 409/6±704/32 و 041/4±995/43 محاسبه ...

بررسی بیولوژی وتغییرات جمعیت Aphis gossypii Glover درمزارع پنبه گرگان

INSECTICIDE RESISTANCE IN THE COTTON APHID, Aphis gossypii GLOVER IN EGYPT

The cotton aphid, Aphis gossypii Glover (Hemiptera Aphididae), is one of the most important sap sucking pests in many cotton-growing areas world-wide. In this study, the efficacies of seven insecticides [organophosphate (Fenitrothion & Pirimiphos-methyl), carbamate (Carbosulfan & Aldicarb), pyrethroid (Lambda-Cyhalothrin & Deltamethrin) and imidaclopride (Confidor)] were determined against four...