Increases of Heliothis1 spp. in Cotton Under Various Insecticide Treatment Regimes2

Steenwyk, R. A. Van; Toscano, Nick C.; Ballmer, G. R.; Kido, K; Reynolds, H. T.

doi:10.1093/ee/4.6.993

Cited by 12 publications

(4 citation statements)

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“…Insecticidal exclusion of natural enemies, as a means to assess predator/parasitoid efficacy, was suggested by Debach (1946). In other studies, as in ours, chemicals did not eradicate natural enemies from test plots, but they did reduce the numbers of predators sufficiently to cause a significant explosion of prey (pest) populations (Eveleens, van den Bosch, and Ehler 1973;Huffaker and Flaherty 1966;Smith and Hagen 1959;Stoltz and Stern 1978b;van Steenwyk et al 1975).…”

Section: Impact Of Insecticidesupporting

confidence: 49%

“…Pest outbreaks in agroecosystems have often been attributed to the indiscriminate use of synthetic chemicals and widespread loss of beneficials (Debach 1974;Eveleens, van .den Bosch, and Ehler 1973;Falcon et al 1968;Pimentel 1961;Smith and Hagen 1959;Stern et al 1959;Stoltz and Stern 1978b;van den Bosch et aL 1971;van Steenwyk et aL 1975). Integration of other pest management tactics, such as host-plant resistance (HPR), may reduce the need for chemicals and insure greater safeguards against the occasional loss of natural enemies when pesticides are used.…”

Section: Role Of Natural Enemiesmentioning

confidence: 99%

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The impact of cotton plant resistance on spider mites and their natural enemies

Trichilo¹,

Leigh²

1986

Hilg

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A spider mite-resistant and a spider mite-susceptible variety of cotton were planted in the field in a replicated design. An acaricide (dicofol) and an insecticide (acephate) were used to manipulate numbers of spider mites and their natural enemies. In general, numbers of spider mites remained low until just before midseason when 650°D air temperature had accumulated. At 650°D, mite numbers began to increase more sharply and reached significantly (P

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Section: Impact Of Insecticidesupporting

confidence: 49%

Section: Role Of Natural Enemiesmentioning

confidence: 99%

The impact of cotton plant resistance on spider mites and their natural enemies

Trichilo¹,

Leigh²

1986

Hilg

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“…The use of insecticides for the control of pests, created the problems of environmental pollution and development of resistance by insects against insecticides. VAN STEENWYK et al (1975) observed that season long application of insecticides in cotton field results in destroying beneficial insects thus accelerating the emergence of secondary pests. Moreover, early treatments with insecticides in cotton crop are to be avoided because of thc adverse cffccts on beneficial insects which are most abundant at that time.…”

Section: Introductionmentioning

confidence: 99%

Efficacy of combined sex pheromones for the control of three major bollworms of cotton¹

Qureshi¹,

Ahmed²

1989

J Applied Entomology

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The efficacy of combined sex pheromone (PB/SB‐ROPE) formulation, containing 1:1 mixture of cis, cis and cis, trans isomers of 7,11‐hexadecadienyl acetate for pink bollworm; 10:1 mixture of the (E,E)‐10,12‐hexadecadienal and (Z)‐11‐hexadecenal components for the two species of spotted bollworm, was evaluated in comparison with insecticides for the control of three major bollworm pests of cotton in Pakistan. The pheromone and insecticide applications were commenced at pin head square stage in two cotton blocks of 4 hectares each separately. PB/SB‐ROPE significantly reduced the infestation of pink and two species of spotted bollworms in squares and green bolls as compared to insecticides and control treatments. However, the infestation in flowers was at par in PB/SB‐ROPE and insecticides treated blocks. The male moth population of three bollworm species also remained low throughout the cotton season in PB/SB‐ROPE treated blocks as compared with insecticides treated and control blocks. Zusammenfassung Zur Wirkung einer Kombination von Sexualpheromonen bei der Bekämpfung von drei an Baumwolle schädlichen Lepidopterenarten Es wurde die Wirkung der Sexualpheromon‐Kombination PB/SB‐ROPE, bestehend aus dem Sexual‐pheromon des “pink bollworm” (Pectinophora gossypiella) (1:1‐Mischung von cis, cis und cis‐trans‐Isomeren von 7,11‐Hexadecadienylazetat) und dem Sexualpheromon der beiden “spotted bollworms” (Earias vittella und insulana) (10:1‐Mischung von (E,E)‐10,12‐Hexadecadienal und (Z)‐11‐Hexadecenal) im Vergleich mit Insektiziden bei der Bekämpfung der 3 Baumwollschädlinge in Pakistan untersucht. Die Pheromone und Insektizide wurden im “pin head square”‐Stadium (bei Erscheinen der ersten Blütenknospen) in zwei Baumwollfeldern von je 4 ha getrennt angewandt. Die PB/SB‐ROPE‐Kombination verringerte signifikant den Befall durch Pectinophora gossypiella und die beiden Earias‐Arten während des Stadiums der Blütenknospen und des Stadiums der grünen Samenkapseln im Vergleich zur Insektizidanwendung und Kontrolle. Dagegen war der Befall der Blüten bei der mit der Pheromon‐Kombination und der mit Insektiziden behandelten Parzelle etwa gleich. Die Population der männlichen Falter der 3 Baumwollschädlinge blieb während der Baumwolle‐Saison in allen 3 Fällen: Pheromon ‐ Insektizide ‐ Kontrolle, niedrig.

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“…These are controlled generally by applying pesticides but these pesticides cause lot of environmental concerns and also on human health (Gill and Garg, 2014) moreover the fruit flies have attain resistance against pesticides (Van Steenwyck et al, 1975) so the focus is now diverting towards other control practices in which sterilization using radiation is an important tool. Nuclear techniques are already being practically applied convincingly in various areas of entomology (Bakri et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Adult emergence percentage from irradiated fruit flies, Bactrocera zonata and Bactrocera cucurbitae pupae

Naveed¹,

Arif²,

Ahmad³

2015

J. Entomol. Nematol.

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Fruit flies are regarded as one of the most devastating pest of fruits and vegetables on earth planet. Generally chemical control is implemented for their control but it poses lot of eco-environmental concerns so the emphasis is now turning towards eco-friendly management practices. Bio-control is an efficient and environmentally sound approach and augmentation is primarily focus on classical biological control program. In this study, eight sub-sterilizing doses of 0, 20, 30, 40, 50, 60, 70 and 80 were tested against Bactrocera zonata and Bactrocera cucurbitae pupae. The results showed that radiation prolong the duration of pupal stage and hatching is reduced by applying radiation. This also shows that when the quantity of the radiation increases, the adult emergence decreases. This study could be very useful in exploiting the potential host for longer period of time for culturing their pupal parasitoids.

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Increases of Heliothis1 spp. in Cotton Under Various Insecticide Treatment Regimes2

Cited by 12 publications

References 0 publications

The impact of cotton plant resistance on spider mites and their natural enemies

The impact of cotton plant resistance on spider mites and their natural enemies

Efficacy of combined sex pheromones for the control of three major bollworms of cotton¹

Adult emergence percentage from irradiated fruit flies, Bactrocera zonata and Bactrocera cucurbitae pupae

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Increases of Heliothis1 spp. in Cotton Under Various Insecticide Treatment Regimes2

Cited by 12 publications

References 0 publications

The impact of cotton plant resistance on spider mites and their natural enemies

The impact of cotton plant resistance on spider mites and their natural enemies

Efficacy of combined sex pheromones for the control of three major bollworms of cotton1

Adult emergence percentage from irradiated fruit flies, Bactrocera zonata and Bactrocera cucurbitae pupae

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Efficacy of combined sex pheromones for the control of three major bollworms of cotton¹