The Modification of Reproduction in Insects Treated With Alkylating Agents. I. Inhibition of Ovarian Growth and Egg Production and Hatchability

Crystal, Maxwell M.; Lachance, Leo E.

doi:10.2307/1539402

Cited by 28 publications

(16 citation statements)

References 7 publications

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“…To determine the fertility ( egg hatchability%), three or four patches having not less than 100 eggs were collected during the first three successive days of oviposition and incubated under the laboratory conditions until hatching and the neonates number was recorded, also fecundity (no. of eggs/female) and fecundity percentage was calculated according to Crystal and Lachance (1963) All data were subjected to analysis of variance (ANOVA) through SPSS computer program (2004) and the means values were compared using Duncan's multiple range test (1955).…”

Section: Biological Studiesmentioning

confidence: 99%

Influence of Some Novel Insecticides on Physiological and Biological Aspects of Spodoptera littoralis (Boisduval)

El-Dewy

2017

Alexandria Science Exchange Journal: An International Quarterly

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Chloranitraniliprole, pyridalyl, indoxacarb, emamectin-benzoate and spinetoram are promising insecticides in the Lepidopteran insects control. The effect of the sublethal concentrations (LC 25 ) of these compounds on some physiological and biological aspects of the 4 th larval instar of Spodoptera littoralis (Boisd.) laboratory strain using feeding technique was investigated. Based on the LC 50 values, emamectin-benzoat was the most effective insecticide followed by indoxacarb while spinetoram was the least toxic one. Chloranitraniliprole and pyridalyl exhibited a moderate toxic effect. The tested insecticides at LC 25 significantly decreased the consumption index, relative growth rate and efficiency of converting ingested and digested food into body tissue, while did not significantly affect the approximate digestibility. All the tested insecticides significantly prolonged the larval duration and decreased the pupal duration of S.littorallis without significant differences among them. As latent effects on survived larvae, these insecticides significantly decreased the percentages of normal pupae, adult emergence, fecundity and fertility of the pest as compared with control. Spinetoram was the least effective on the biological aspects. Pyridalyl, chloranitraniliprole, emamectin-benzoate and indoxacarb could be used as important tools in integrated management programs of S. littoralis.

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Section: Biological Studiesmentioning

confidence: 99%

Influence of Some Novel Insecticides on Physiological and Biological Aspects of Spodoptera littoralis (Boisduval)

El-Dewy

2017

Alexandria Science Exchange Journal: An International Quarterly

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“…Control of hatchability percentage calculated according to Zidan and Abdel-Megeed (1987) Calculated according to Crystal and Lachance (1963) as follows: No. eggs per treated female/ No.…”

Section: Egg Laying and Hatchabilitymentioning

confidence: 99%

IMPACT FACTORS OF TWO NON-CONVENTIONAL COMPOUNDS ON Spodoptera littoralis (BOISD.)

Amer¹,

Yacoub²

2016

Journal of Plant Protection and Pathology

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Cotton Leaf worm, Spodoptera littoralis (Boisd.) treated as 4 th instar larvae by two compounds of acetyl salicylic acid (A.S.A) and chlorpheniramine maleate (C.P.M) to evaluate its efficacy on S. littoralis larvae as alternative new compounds for insecticides. Also, some biological and life table parameters of S. littoralis treated as 4 th instar larvae were estimated. In addition, S. littoralis moths treated by LC 50 of A.S.A and C.P.M to evaluate the mating frequency & ability and batches fluff cover shape deposited by moth in different treatments (T♂xT♀, U♂xT♀, T♂xU♀ and U♂xU♀). Obtained results could be summarized as following: Tested compounds of A.S.A and C.P.M were efficacy on S. littoralis larvae, but C.P.M was more toxicity and effective on the most estimated parameters than another compound (A.S.A). Compounds of A.S.A and C.P.M had increased in larval & pupal mortalities, control of hatchability and sterility; also, tested compounds decreased the pupation, moth's emergency, number of eggs per female, egg hatchability and fecundity of S. littoralis treated as 4 th instar larvae. In addition, its caused decreasing in mating frequency and ability of different crosses moth and the batches deposited without fluff covers and the egg-masses had unstable partly on the deposited surface until hatching, especially in T♂xT♀ treatments. Moreover, the two tested compounds, especially C.P.M had drastically decreased the life table parameters as number of females/female (Mx), survival rate (Lx), net reproductive rate (Ro), intrinsic rate of natural increase (r m), and finite rate of increase (e rm). Aforementioned compounds had increased from generation (T) and doubling (DT) times. So, A.S.A and C.P.M are considered affecting compounds against two harmful stages (larvae and moths) of S. littoralis, especially C.P.M, that it could be used to reduce the insecticide applications but need more experiments in a wide range.

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“…Then the adult longevity was determined (from adult emergence until adult death for male and female), fecundity (no. of eggs/female), fertility (percentage of eggs hatchability) and fecundity percentage was calculated according to Crystal and Lachance (1963) All biological aspects were analyzed using one-way ANOVA by SPSS 13.0 (SPSS, 2004). Duncan's Multiple Range Test (DMRT) was used to determine the probability level to compare the differences among some parameter means (P<0.05) by Costat system for Windows, Version 6.311, Berkeley, CA, USA, Costat program (2006).…”

Section: Biological Studiesmentioning

confidence: 99%

Biological, Toxicological Potency and Field Persistence of New Insecticides against Spodoptera littoralis (Boisduval)

2013

Alexandria Science Exchange Journal: An International Quarterly

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Conventional insecticides exhibited negative effects on environment components and natural enemies. The tested noval insecticides, viz pyridalyl, emamectin-benzoate and indoxacarb compared to chlorfluazuron were evaluated against 2 nd and 4 th larval instar of Spodoptera littoralis (Boisd.) laboratory strain and their latent effects on some biological aspects were studied. Also, field persistence residues of these tested compounds against field strain of this pest were estimated via determination of Lt 50 values. On basis of LC 50 values, emamectin benzoate was the most effective compound, followed by indoxacarb and chlorfluazuron, while pyridelyl was the least toxic one, where the LC 50 values were 0.539, 5.218, 29.83 and 39.32 mg a.i./L after 48 h, while the LC 50 values were 0.278, 2.732, 7.198 and 27.3 mg a.i./L after 72 h from exposure, respectively against 4 th larval instar of S. littoralis. From these results, the toxicity of the tested compounds increased with the increasing in the exposure time and decreased by increasing the larval instars. The latent effects of the tested compounds according to sublethal concentrations against 4 th instar larvae of laboratory strain were significantly decreased in pupal duration, pupal weight, percentage of normal pupae, adult emergence, fecundity, fertility and adult longevity compared to the control, while these compounds increased significantly larval duration and malformed pupae. Based on the semi-field application, pyridalyl and emamectinbenzoate proved to be the most effective in initial and residual activity causing 100 and 54% mortality for pyridalyl and 100 and 42.13% for emamectin-benzoate, respectively, while indoxacarb was the least effective. Also, pyridalyl show significant, superior persistence residual activity against 4 th larval instar of the field strain with Lt 50 valued 7.74 days, emamectin-benzoate and chlorfluazuron come in second order, with Lt 50 5.59 and 5.56 days, respectively, indoxacarb showed the shortest (1.4 days). From the results, pyridalyl and emamectin-benzoate could be used into Integrated Pest Management against Spodoptera littoralis under field conditions.

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The Modification of Reproduction in Insects Treated With Alkylating Agents. I. Inhibition of Ovarian Growth and Egg Production and Hatchability

Abstract: Chemical compounds that can induce sexual sterility in the screw-worm fly Crystal, Maxwell M and Lachance, Leo E. 1963. "THE MODIFICATION OF REPRODUCTION IN INSECTS TREATED WITH ALKYLATING AGENTS. I.

Cited by 28 publications

References 7 publications

Influence of Some Novel Insecticides on Physiological and Biological Aspects of Spodoptera littoralis (Boisduval)

Influence of Some Novel Insecticides on Physiological and Biological Aspects of Spodoptera littoralis (Boisduval)

IMPACT FACTORS OF TWO NON-CONVENTIONAL COMPOUNDS ON Spodoptera littoralis (BOISD.)

Biological, Toxicological Potency and Field Persistence of New Insecticides against Spodoptera littoralis (Boisduval)

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