Studies on the nutritional state and the response to aggregation pheromones in the bark beetle, <i>Ips typographus</i> (L.) (Col., Scolytidae)

Němec, Václav; Zumr, V.; Starý, Petr

doi:10.1111/j.1439-0418.1993.tb01208.x

Cited by 11 publications

(10 citation statements)

References 23 publications

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“…In the case of a pheromone trap 25 m from an infested tree, only 20-54% of the catch would likely be from the local population (Nemec et al 1993). Based on an analysis of the beetles' fat bodies, Nemec et al (1993) suggested that at most just one-third of the trapped beetles had come from local populations, as their fat bodies were large. The rest of the I. typographus beetles, with more developed muscle tissue, must have flown longer distances.…”

Section: Discussionmentioning

confidence: 99%

Nematodes associated withIps cembrae(Coleoptera: Curculionidae): comparison of generations, sexes and sampling methods

Grucmanová

Holuša

Čermák

et al. 2015

J Applied Entomology

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A study of nematodes associated with the large larch bark beetle Ips cembrae (Heer 1836) was carried out at three locations in the Czech Republic. The proportion of beetles infested by endoparasitic nematodes (representatives of genera Contortylenchus, Parasitylenchus, Cryptaphelenchus and Parasitorhabditis) ranged from 29.9 to 50.9%. Significant differences were determined in nematode infestation levels among locations, generations and sampling methods. No differences were found in infestation rates between males and females. The percentage of bark beetles with phoretic nematodes ranged from 18 to 42.9%. Phoretic nematodes directly found under elytra, on wings and between body segments of the bark beetles belong to the genus Micoletzkya. However, adults and juveniles of other two phoretic species Laimaphelenchus penardi and Bursaphelenchus sp. were found in the gallery frass of I. cembrae. Infestation by phoretic nematodes positively correlated with the presence of mites under elytra.

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Section: Discussionmentioning

confidence: 99%

Nematodes associated withIps cembrae(Coleoptera: Curculionidae): comparison of generations, sexes and sampling methods

Grucmanová

Holuša

Čermák

et al. 2015

J Applied Entomology

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“…2000)? Do differences exist in the movements of starved and satiated beetles; are there correlations between flight behaviour and nutrient reserves (Nemec et al . 1993)?…”

Section: Discussionmentioning

confidence: 99%

Flight movement of Scapanes australis australis (Boisduval) (Coleoptera: Scarabaeidae: Dynastinae) in Papua New Guinea: a radiotelemetry study

Beaudoin‐Ollivier¹,

Bonaccorso

Aloysius³

et al. 2003

Australian Journal of Entomology

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We used radiotelemetry and/or chemical light-tags to track the flight of 15 individuals of Scapanes australis in Madang Province, Papua New Guinea. This species causes severe economic impacts on coconut palms in young plantations. Flights to feeding, mating, resting, and possibly oviposition sites covered distances of 52 to 835 m in males, and from 245 m to >1000 m in females. Upon release, females flew in a tight upward spiral above canopy level (>20 m), then usually flew along a single bearing out of radio reception within 1 min of initiating flight. Dispersing females probably follow scent trails to pheromone-releasing males that occupy feeding galleries excavated most frequently in coconut palms, or search for oviposition sites. Most tagged females were not found again, because they dispersed beyond the tracking capabilities of our radio-receivers, but one female was followed for 245 m to a feeding gallery excavated by an adult male. Males typically flew within 5 m of the ground, took erratic flight paths with numerous turns, and frequently circled coconuts and other host plants. We followed males from the release point until they ceased flight for a night. Males passed daylight hours either in a feeding gallery within a host plant or under soil litter.

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“…Considerable dispersal capability is essential for host location. Some beetles feed and even reproduce in their natal tree before taking their first flight (Byers & Löfqvist, 1989); it is thought that approximately a third of emerging beetles may be attracted by pheromones (if present immediately after emergence, while the remaining two‐thirds travel greater distances and >50% are thought to fly further than 500 m (Nemec, Zumr & Stary, 1993; Wermelinger, 2004). I. typographus can cover distances of >750 m per day, and can probably disperse in excess of 35 km, in extreme cases, crossing areas of unsuitable habitat and high altitude (Botterweg, 1982; Lakatos, 2002; Piel et al , 2005; Stenseth, 1984).…”

Section: Dispersalmentioning

confidence: 99%

Population dynamics in changing environments: the case of an eruptive forest pest species

Økland²,

et al. 2011

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In recent decades we have seen rapid and co-occurring changes in landscape structure, species distributions and even climate as consequences of human activity. Such changes affect the dynamics of the interaction between major forest pest species, such as bark beetles (Coleoptera: Curculionidae, Scolytinae), and their host trees. Normally breeding mostly in broken or severely stressed spruce; at high population densities some bark beetle species can colonise and kill healthy trees on scales ranging from single trees in a stand to multi-annual landscape-wide outbreaks. In Eurasia, the largest outbreaks are caused by the spruce bark beetle, Ips typographus (Linnaeus), which is common and shares a wide distribution with its main host, Norway spruce (Picea abies Karst.). A large literature is now available, from which this review aims to synthesize research relevant for the population dynamics of I. typographus and co-occurring species under changing conditions. We find that spruce bark beetle population dynamics tend to be metastable, but that mixed-species and age-heterogeneous forests with good site-matching tend to be less susceptible to large-scale outbreaks. While large accumulations of logs should be removed and/or debarked before the next swarming period, intensive removal of all coarse dead wood may be counterproductive, as it reduces the diversity of predators that in some areas may play a role in keeping I. typographus populations below the outbreak threshold, and sanitary logging frequently causes edge effects and root damage, reducing the resistance of remaining trees. It is very hard to predict the outcome of interspecific interactions due to invading beetle species or I. typographus establishing outside its current range, as they can be of varying sign and strength and may fluctuate depending on environmental factors and population phase. Most research indicates that beetle outbreaks will increase in frequency and magnitude as temperature, wind speed and precipitation variability increases, and that mitigating forestry practices should be adopted as soon as possible considering the time lags involved.

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Studies on the nutritional state and the response to aggregation pheromones in the bark beetle, Ips typographus (L.) (Col., Scolytidae)

Cited by 11 publications

References 23 publications

Nematodes associated withIps cembrae(Coleoptera: Curculionidae): comparison of generations, sexes and sampling methods

Nematodes associated withIps cembrae(Coleoptera: Curculionidae): comparison of generations, sexes and sampling methods

Flight movement of Scapanes australis australis (Boisduval) (Coleoptera: Scarabaeidae: Dynastinae) in Papua New Guinea: a radiotelemetry study

Population dynamics in changing environments: the case of an eruptive forest pest species

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