scholarly journals Culex quinquefasciatus  Egg Membrane Alteration and Ovicidal Activity of Cipadessa baccifera (Roth) Plant Extracts Compared to Synthetic Insect Growth Regulators

2019 ◽  
Vol Volume 10 ◽  
pp. 145-151
Author(s):  
Govindaraju Ramkumar ◽  
Sengodan Karthi ◽  
Muthugounder S Shivakumar ◽  
Eliningaya J Kweka
Keyword(s):  
Growth Regulators ◽  
Plant Extracts ◽  
Culex Quinquefasciatus ◽  
Ovicidal Activity ◽  
Insect Growth Regulators ◽  
Insect Growth ◽  
Egg Membrane

scholarly journals Bioefficacy of some insect growth regulators and plant extracts against mosquito larvae of Aedes aegypti

2019 ◽  
Vol 6 (1) ◽  
pp. 001-006
Author(s):  
Mohamd R. Al-Zahrani ◽  
Jazem A. Mahyoub ◽  
Khalid M. Al-Ghamdi ◽  
Habeeb M. Al-Solami
Keyword(s):  
Aedes Aegypti ◽  
Growth Regulators ◽  
Plant Extracts ◽  
Mosquito Larvae ◽  
Insect Growth Regulators ◽  
Insect Growth

Effect of insect growth regulators and fertilizers applied as foliar sprays during the egg stage of the sawfly Neodiprionsertifer

1976 ◽  
Vol 6 (4) ◽  
pp. 523-531 ◽  
Author(s):  
W. H. Fogal ◽  
C. R. Sullivan
Keyword(s):  
Growth Regulators ◽  
Larval Mortality ◽  
Field Trials ◽  
Insect Growth Regulator ◽  
Red Pine ◽  
Ovicidal Activity ◽  
Insect Growth Regulators ◽  
Geometrical Isomers ◽  
Egg Hatch ◽  
Insect Growth

Two insect growth regulators, a mixture containing about 25% Cecropia juvenile hormone with its geometrical isomers (AY-22342-3: Ayerst Research Laboratories, Saint-Laurent, Quebec) and a preparation containing 75% of the aromatic terpenoid ether, 4-ethylphenyl-6,7-epoxygeranyl ether (R-20458-B: Stauffer Chemical Co., Mountain View, California), were tested under field conditions for ovicidal activity against eggs of Neodiprionsertifer (Geoff.). Single egg clusters on Scots pine (Pinussylvestris L.) and whole red pine (P. resinosa Ait.) trees were sprayed to the drip point with formulations containing 0.1, 1, or 10 g/litre of insect growth regulator. AY-22342-3 reduced egg hatch at 10 g/litre on both tree species but was more effective in the red pine trial. R-20458-B did not reduce egg hatch significantly. Results with AY-22342-3 in the laboratory were about twice as effective as field trials. The application of fertilizers (urea, KNO3, or NH4NO3) accompanying a spray of AY-22342-3 on whole red pine trees does not enhance larval mortality. For trees receiving relatively intensive care, notably ornamentals and Christmas trees, the ovicidal activity of insect growth regulators might be useful as a means of preventing sawfly defoliation.

scholarly journals Insecticide resistance to insect growth regulators, avermectins, spinosyns and diamides in Culex quinquefasciatus in Saudi Arabia

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Abdulwahab M. Hafez ◽  
Naeem Abbas
Keyword(s):  
Saudi Arabia ◽  
Growth Regulators ◽  
High Resistance ◽  
Culex Quinquefasciatus ◽  
World Health ◽  
Integrated Vector Management ◽  
Insect Growth Regulators ◽  
Insect Growth ◽  
Low Resistance ◽  
Vector Management

Abstract Background Culex quinquefasciatus is not only a biting nuisance but also an important vector of fatal diseases. In Saudi Arabia, management measures to control this mosquito and thereby prevent associated disease transmission have focused on insecticides. Nevertheless, information on the resistance status of C. quinquefasciatus is insufficient, especially concerning insecticides containing novel classes of insecticides. Methods We evaluated six insecticides belonging to four classes of insecticides (insect growth regulators [3], avermectins [1], diamides [1] and spinosyns [1]) for toxicity and resistance in eight C. quinquefasciatus populations (from Ishbiliya, Al-Masfa, Al-Masanie, Al-Washlah, Al-Nakhil, Irqah, Al-Suwaidi and Al-Ghanemiya) following World Health Organisation protocols. Results Resistance status ranging from susceptibility/low resistance to high resistance, in comparison with the susceptible strain, was detected for cyromazine in the eight C. quinquefasciatus populations: Ishbiliya (resistance ratio [RR] = 3.33), Al-Masfa (RR = 4.33), Al-Masanie (RR = 3.67), Al-Washlah (RR = 2.33), Al-Nakhil (RR = 5.33), Irqah (RR = 7.00), Al-Suwaidi (RR = 21.33) and Al-Ghanemiya (RR = 16.00). All C. quinquefasciatus populations exhibited a high level of resistance to diflubenzuron (RR = 13.33–43.33), with the exception of Al-Nakhil which exhibited moderate resistance (RR = 10.00). Susceptibility/low resistance to high resistance was observed for triflumuron in the eight C. quinquefasciatus populations: Ishbiliya (RR = 0.50), Al-Ghanemiya (RR =  3.00), Al-Suwaidi (RR =  10.00), Al-Masfa (RR =  5.00), Al-Masanie (RR =  10.00), Al-Nakhil (RR =  5.00), Irqah (RR =  5.00) and Al-Washlah (RR =  15.00). Susceptibility/low resistance was assessed for abamectin, chlorantraniliprole and spinosad in all C. quinquefasciatus populations, with RR ranges of 0.25–3.50, 0.17–2.19, and 0.02–0.50, respectively. However, the population collected from Irqah showed high resistance to chlorantraniliprole (RR = 11.93). Conclusions The detection of widespread resistance to insect growth regulators in C. quinquefasciatus highlights an urgent need to establish integrated vector management strategies. Our results may facilitate the selection of potent insecticides for integrated vector management programmes for C. quinquefasciatus. Graphical Abstract

scholarly journals Existing potentials in Insect Growth Regulators (IGR) for crop pest control

2021 ◽  
Vol 10 (1) ◽  
pp. e35910111726
Author(s):  
Raul Apolinário ◽  
Denise Feder
Keyword(s):  
Pest Control ◽  
Growth Regulators ◽  
Control Methods ◽  
Ovicidal Activity ◽  
Chitin Synthesis ◽  
Insect Growth Regulators ◽  
Crop Pests ◽  
Digital Platforms ◽  
Insect Growth ◽  
Crop Pest

The aim of this review is to explore the potentials existing in insecticides that are considered Insect Growth Regulators (IGR) for the control of insects considered crop pests, with an observation of the main mechanisms of neuroendocrine modifications, development and viability of the species used as study models. The data search on digital platforms, as well as the screening of materials about crop pests, resulted in 74 IGR references and their potentials. The analysis of the information found demonstrated a greater use in works of compounds belonging to chitin synthesis inhibitors class; and orders such as Hemiptera, Lepidoptera, Coleoptera, Orthoptera, Thysanoptera and Diptera were represented in the studies. The main types of activities reunited were morphological and anatomical modifications, reproductive modifications, alterations in developmental stage, alterations in developmental period, ovicidal activity, larvicidal/ninficidal activity and fagoinhibition. The congregated knowledge about the main pests used as study models, the main IGRs compounds and their biological potentials allow an evaluation of their use as an informative source for crop pest control methods.

Ovicidal activity of three insect growth regulators against Aedes and Culex mosquitoes

Acta Tropica ◽  
2013 ◽  
Vol 128 (1) ◽  
pp. 103-109 ◽  
Author(s):  
Devi S. Suman ◽  
Yi Wang ◽  
Anwar L. Bilgrami ◽  
Randy Gaugler
Keyword(s):  
Growth Regulators ◽  
Ovicidal Activity ◽  
Insect Growth Regulators ◽  
Culex Mosquitoes ◽  
Insect Growth
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