THE BIOLOGY OF <i>DIORYCTRIA AMATELLA</i> (LEPIDOPTERA: PHYCITIDAE)

Coulson, Robert N.; Franklin, Rudolph T.

doi:10.4039/ent102679-6

Cited by 13 publications

(11 citation statements)

References 6 publications

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“…Larval feeding on the flowers, conelets, cones, and shoots of southern pines can reduce yields of pine cones by as much as 35 percent. The life history of D. amatella has been reported in part by Ebel (1963Ebel ( , 1965, Neunzig and others (19&l), Coulson and Franklin (1970), and Ebel and others (1975).…”

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confidence: 96%

Duration of the Larval, Pupal, and Moth Stages of the Southern Pine Coneworm Dioryctria Amatella (Hulst)

Williams¹,

Fatzinger²

1980

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ABSTRACT.-The day's duration of each developmental stage of the southern pine coneworm, Dioryctriu umareh (Hulst), when reared on artificial medium was determined under controlled laboratory conditions. These results will provide a method for estimating the availability of the different stages during rearings without the necessity of measuring larval-head capsule widths or closely observing colonies for evidence of larval ecdysis, pupation, or moth emergence.

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confidence: 96%

Duration of the Larval, Pupal, and Moth Stages of the Southern Pine Coneworm Dioryctria Amatella (Hulst)

Williams¹,

Fatzinger²

1980

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“…The rust causes the bark to blister, and in the case of stalactiform blister rust, the active edges of the canker usually have open fresh wounds. The canker may also be utilized as an overwintering habitat for the insect, as has been observed for Dioryctria amatella in Cronartiumfusiforme cankers (Coulson and Franklin 1970).…”

Section: Discussionmentioning

confidence: 99%

“…Both Synanthedon and Dioryctria spp. prefer bark wounds for attack sites (Weidman and Robbins 1947, Coulson and Franklin 1970, Powers and Sundahl 1973, Campbell and Barstow 1975, Koehler et al 1983, Frankie et al 1986, Duncan 1996 . The rust causes the bark to blister, and in the case of stalactiform blister rust, the active edges of the canker usually have open fresh wounds.…”

Section: Discussionmentioning

confidence: 99%

“…Canker wounds may predispose trees to insect attack by providing oviposition sites for pitch moths (Mutuura and Munroe 1969, Coulson and Franklin 1970, Wong 1972, Ives and Wong 1988. A correlation was found between tree resistance to stalactiform blister rust and attack by pitch moth in the PGTIS provenance trial, where tree provenance and family had significant effects on resistance to the disease and insect (Wu et al 1996).…”

Section: Discussionmentioning

confidence: 99%

“…Once this is obtained, trap catches can be correlated to the annual occurrence of fresh damage, which would then lead to the development of a model where pheromone-trap catches will indicate when insect population size increases to intolerable damage levels. Mass trapping or pheromone disruption of the Douglas-fir pitch moth in the PGTlS may then be tested as feasible control option s. (Coulson and Franklin 1970, Wong 1972, Furniss and Carol in 1977. Dioryctria banksiella and D. cambiicola are also found in association with the western gall rust (Endocronartium harknessii J.P. Moore), and the combined effect of the rust and the insect often causes breakage of the stem at the spot of tunnelling (Mutuura andMunroe 1969, Ives andWong 1988).…”

Section: Discussionmentioning

confidence: 99%

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Variation in lodgepole pine susceptibility to pitch moth (lepidoptera: sesiidae and pyralidae) attack at the Prince George tree improvement station

Rocchini¹

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Trees in four lodgepole pine seed orchards and a provenance trial have been severely damaged by pitch moth larvae at the Prince George Tree Improvement Station (PGTIS) in recent years. Pitch moths can significantly weaken these trees, resulting in breakage or reduced cone yield, prompting the need for a management strategy. Field trials were carried out to determine which species of pitch moth were present, and gain insight into their biology, including responses to synthetic pheromones, association with disease, and factors affecting tree susceptibility to pitch moth. The purpose was to Jay the groundwork for future cultural or pheromone-based management strategies.Results from emergence traps, pheromone-baited traps , and damage surveys indicated the two spec ies of pitch moth present at the PGTIS were the Douglas-fir pitch moth (Synanthedon novaroensis), and the western pine moth (Dioryctria cambiicola). The former is more abundant in the seed orchards (22.5 % and 1.4 %of trees were attacked by Douglas-fir pitch moth and western pine moth, respectively), and the latter more abundant in the provenance trial (17.5% and 26.4 %, respectively). Pheromone-based trapping confirmed the ge neric clearwing moth pheromone (Z,Z)-3,13-octadecadienyl acetate to be attractive to Douglas-fir pitch moth males. Based on the catches of 35 males, the flight period of this species in 1996 was June 20 to Aug. 6. The flight period of western pine moth in 1995 was July 12 to Sept. 23, based on the capture of 31 moths in emergence cages. In the seed orchard and provenance trial , several tree factors were identified that related to pitch moth incidence, and which cou ld be used in a management strategy. Both pitch moths generally occurred in association with cankers of stalactiform blister rust (P < 0.05). Orchard surveys indicated that Ill clone, tree size, tree location, and presence of previous attack all significantly contributed to the likelihood of a tree being attacked by Douglas-fir pitch moth (P < 0.05) , while subjective measurements of tree vigour did not (P > 0.05). Likelihood of pitch moth attack was positively related to tree size and presence of previous attack. Primary resin volume did not explain differences in clonal susceptibility to Douglas-fir pitch moth, although there were some significant differences between individual clones.My results indicated that management of pitch moths in the PGTIS seed orchards can be focussed on Douglas-fir pitch moth . Therefore, pheromone-based management techniques may be feasible for this species, but additional research is needed to determine optimal parameters for the use of pheromones. Management aimed at minimizing the incidence of stem rusts would be beneficial, as well as the reduction or elimination of susceptible clones from the orchards.

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Insects of Reproductive Structures

Strong

Mangini

Candau

2023

Forest Entomology and Pathology

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The insects that feed on reproductive structures of forest trees are not only economically important, they are fascinating examples of the ability of insects to adapt to and exploit the many niches available in forest ecosystems. Cones, fruits, seeds, nuts, catkins and pollen are rich food sources available to insect herbivores. These reproductive structures are qualitatively and quantitatively different from vegetative parts of the tree, in terms of food quality, spatial and temporal distribution, and plant protective strategies. In this chapter we will explore types of reproductive structure herbivory, nutritive value and host defenses, insect strategies and community structure, evolutionary consequences for the host, and implications for management.

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THE BIOLOGY OF DIORYCTRIA AMATELLA (LEPIDOPTERA: PHYCITIDAE)

Cited by 13 publications

References 6 publications

Duration of the Larval, Pupal, and Moth Stages of the Southern Pine Coneworm Dioryctria Amatella (Hulst)

Duration of the Larval, Pupal, and Moth Stages of the Southern Pine Coneworm Dioryctria Amatella (Hulst)

Variation in lodgepole pine susceptibility to pitch moth (lepidoptera: sesiidae and pyralidae) attack at the Prince George tree improvement station

Insects of Reproductive Structures

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