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.

Modelling pesticide residues on greasy wool: surveys of the insect growth regulators triflumuron and diflubenzuron

1999 ◽  
Vol 39 (5) ◽  
pp. 529 ◽  
Author(s):  
P. W. Morcombe ◽  
M. Gillibrand ◽  
B. J. Horton ◽  
R. T. F. Armstrong ◽  
N. J. Campbell ◽  
...  
Keyword(s):  
Growth Regulators ◽  
Insect Growth Regulator ◽  
Insect Growth Regulators ◽  
Insect Growth ◽  
Industry Standards ◽  
Breakdown Rates ◽  
Average Residue ◽  
Farm Survey ◽  
On Farm ◽  
The Relationship

Surveys have examined the relationship between louse and flystrike treatments on farms and the resulting residues of insect growth regulators on greasy wool. These results have been summarised using a model of the on-farm survey data. The model estimated the amount of chemical taken up by the wool at application. This was based on experimental breakdown rates of these insecticides on wool determined in controlled trials. The data indicated that the backliner, triflumuron, when used off-shears within 24 h of shearing, was normally applied at slightly higher than the recommended rate on-farm and left an average residue of 30 mg/kg greasy wool at the following shearing 12 months later. Diflubenzuron, applied by dipping or jetting, was usually applied at lower than the recommended rates, and left an average residue of 40 mg/kg on the wool at shearing 12 months later. When treatment was applied to very short wool (<3 weeks after shearing) the residue was only about 20 mg/kg, but when applied at later times after shearing the residue at the following shearing was not closely related to the time of treatment. The model can be used to estimate the expected residue level and likely range of results from most standard insect growth regulator treatments. This will improve advice to producers so most can meet specified industry standards.

scholarly journals Preparation and biological activity evaluation of some benzoylthiourea and benzoylurea compounds

2021 ◽  
Vol 10 (4) ◽  
pp. 371-376 ◽  
Author(s):  
Antar A. Abdelhamid ◽  
A. M. M. Elsaghiera ◽  
Safwat A. Aref ◽  
Mohamed A. Gad ◽  
N. A. Ahmed ◽  
...  
Keyword(s):  
Spodoptera Littoralis ◽  
Food Source ◽  
Larval Mortality ◽  
Insect Growth Regulator ◽  
Chitin Synthesis ◽  
Insect Growth Regulators ◽  
Larval Cuticle ◽  
Insect Growth ◽  
Molting Process ◽  
Sublethal Doses

Due to the complicated problems coming from excessive applications of insecticides, searching for safe substitutes to these insecticides has become a necessity. Thus, the insect growth regulators are candidates to be used in such concern. Comparative studies of the effects of three compounds, 2-benzoyl-N-phenylhydrazine-1-carbothioamide (1), 2-(cyanoacetyl)-N-phenylhydrazine-1-carboxamide (2) and N-(2-(2-cyanoacetyl)hydrazinecarbonothioyl)furan-2-carboxamide (3) (an insect growth regulator inhibiting chitin synthesis), were conducted on Spodoptera littoralis (Boisduval, 1833). The compounds, orally administered, caused larval mortality proportional to the concentrations in the food source. larvae were unable to complete the molting process and died in the old larval cuticle. Larvae contaminated by sublethal doses completed their development to adulthood. N-(2-(2-cyanoacetyl)hydrazinecarbonothioyl)furan-2-carboxamide (3) is more active than the other compounds have LC50 17.082 ppm for 2nd instar larvae and 60.832 ppm for 4th instar larvae.

Efficacy of the insect growth regulators tebufenozide and fenoxycarb for lepidopteran pest control in apples, and their compatibility with biological control for integrated pest management

1996 ◽  
Vol 36 (4) ◽  
pp. 501 ◽  
Author(s):  
BJ Valentine ◽  
GM Gurr ◽  
WG Thwaite
Keyword(s):  
Biological Control ◽  
Growth Regulators ◽  
Growth Regulator ◽  
Codling Moth ◽  
Pheromone Trap ◽  
Insect Growth Regulator ◽  
Panonychus Ulmi ◽  
Insect Growth Regulators ◽  
Insect Growth ◽  
Azinphos Methyl

The insect growth regulators tebufenozide and fenoxycarb were compared with the industry standard organophosphate, azinphos-methyl, in a replicated field trial. In both the 1992-93 and 1993-94 seasons, the 2 insect growth regulators maintained damage levels to harvested and windfall apples below 1% for both codling moth (Cydia pornonella L.) and lightbrown apple moth (Epiphyas postvittana Walker). This was despite considerable pest pressure as indicated by pheromone trap catches of both species. In the first season of the trial, E. postvittana was controlled more effectively (P<0.05) by tebufenozide than by fenoxycarb. In both seasons, populations of two-spotted mite, Tetranychus urticae Koch, and European red mite, Panonychus ulmi Koch, were higher in plots under azinphos-methyl treatment than in either insect growth regulator treatment. Neither insect growth regulator appeared to suppress populations of the phytoseiids Typhlodromus pyri Scheuten and Typhlodromus occidentalis Nesbitt. Limb jarring in the second season showed statistically significant (P<0.05) differences in populations of other predators which may have contributed to the biological control of phytophagous mites in the insect growth regulator treatments. Numbers of spiders, Stethorus spp., and apple dimpling bug (Carnpylomma liebknechti Girault) nymphs were all lower in the azinphos-methyl treatment. Results are discussed in relation to reducing dependence on conventional pesticides by use of more target-specific compounds which may be more compatible with biological control.

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.

EVALUATION OF THE INSECT GROWTH REGULATORS METHOPRENE AND DIFLUBENZURON AGAINST FLOODWATER MOSQUITOES (DIPTERA: CULICIDAE) IN SOUTHWESTERN ONTARIO

1978 ◽  
Vol 110 (3) ◽  
pp. 319-324 ◽  
Author(s):  
C. S. Rodrigues ◽  
R. E. Wright
Keyword(s):  
Growth Regulators ◽  
Field Trials ◽  
Early Summer ◽  
Fourth Instar ◽  
Aedes Vexans ◽  
Insect Growth Regulators ◽  
Partial Control ◽  
Insect Growth ◽  
Average Temperature ◽  
Third Instar Larvae

AbstractIn field trials conducted at Guelph, Ont., methoprene (Altosid® SR-10) at 0.028 kg AI/ha (0.025 lb AI/ac) effectively controlled spring Aedes species following treatment of third- and fourth-instar larvae. However, when treated in the first to third instar, only partial control was obtained. The formulation remained active in the pools for 13 days during which time the average temperature was < 20°C. Methoprene also effectively controlled early-summer Aedes vexans (Meigen) after treatment of fourth-instar larvae. Diflubenzuron (Dimilin® 25% WP) at 0.022 kg AI/ha and 0.045 kg AI/ha (0.02 and 0.04 lb AI/ac) was effective against spring Aedes species following treatment of third-instar larvae.

scholarly journals Effect of Insect Growth Regulators on Citrus Mealybug [Planococcus citri (Homoptera: Pseudococcidae)] Egg Production

HortScience ◽  
2003 ◽  
Vol 38 (7) ◽  
pp. 1397-1399 ◽  
Author(s):  
Raymond A. Cloyd
Keyword(s):  
Growth Regulators ◽  
Indirect Effects ◽  
Egg Production ◽  
Isopropyl Alcohol ◽  
Insect Growth Regulator ◽  
Planococcus Citri ◽  
Insect Growth Regulators ◽  
Citrus Mealybug ◽  
Insect Growth ◽  
Solenostemon Scutellarioides

Greenhouse trials were conducted in 2000-2001 to evaluate the indirect effects of insect growth regulators, whether stimulatory or inhibitory, on the egg production of female citrus mealybug [Planococcus citri (Risso)]. Green coleus [Solenostemon scutellarioides (L.) Codd] were infested with 10 late third instar female citrus mealybugs. The insect growth regulators kinoprene, pyriproxyfen, azadirachtin, buprofezin, and novaluron were applied to infested plants at both the high and low manufacturer recommended rates. Beginning two days after treatments were applied, plants were monitored daily to determine when female mealybugs began to oviposit. Individual mealybugs were removed from plants, placed into glass vials containing 70% isopropyl alcohol when female mealybugs started to oviposit, and dissected to determine the number of eggs. Overall, there were no consistent patterns to suggest that the insect growth regulators and different rates tested had any effect on the egg production of citrus mealybug females. Although, in one instance, the insect growth regulators kinoprene and pyriproxyfen actually lowered citrus mealybug egg production. In addition, the insect growth regulator buprofezin numerically increased female citrus mealybug egg production.

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
Sign in / Sign up

Export Citation Format

Share Document