scispace - formally typeset
Search or ask a question
Topic

Lepidoptera genitalia

About: Lepidoptera genitalia is a research topic. Over the lifetime, 10114 publications have been published within this topic receiving 78876 citations. The topic is also known as: Uncus.


Papers
More filters
Journal ArticleDOI
J. A. Lasota1, Loke T. Kok1
TL;DR: Seasonal variation in abundance of the imported cabbageworm, cabbage looper, Trtchoplusta ni (Hũbner), and diamondback moth was determined in 1982, 1983, and 1984 cabbage plantings in southwestern Virginia.
Abstract: Seasonal variation in abundance of the imported cabbageworm, Artogeia rapae (L.), cabbage looper, Trtchoplusta ni (Hũbner), and diamondback moth, Plutella xylostella (L.), was determined in 1982, 1983, and 1984 cabbage plantings in southwestern Virginia. Two population peaks of diamondback moth were seen in 1983 (single cabbage planting) and 1984 (two cabbage plantings). A larger first peak was observed in both years, and larvae preferentially fed on cabbage frame leaves rather than heads. Two population peaks of cabbage looper also were seen in 1983, but only one (of low density) was observed in 1984. Significantly more cabbage looper larvae and pupae were present on frame leaves compared with heads. Of the three species, the imported cabbageworm reached the most damaging population levels. One to two population peaks of A. rapae occurred in 1982 and 1983 on single cabbage plantings, and two to three peaks occurred in 1984 on summer and fall crops. The undersides of leaf surfaces were consistently favored as oviposition sites. Significantly more larvae were found on heads compared with frame leaves in 1982 but not in the other years. A. rapae favored frame leaves rather than heads for pupation sites.

19 citations

Journal ArticleDOI
TL;DR: Pieris virginiensis retains the phenotypic switch mechanism of its multivoltine relatives although it is univoltinism and one phenotype is never expressed in Nature.
Abstract: Pieris virginiensis retains the phenotypic switch mechanism of its multivoltine relatives although it is univoltine and one phenotype is never expressed in Nature. Univoltinism is correlated with specialization to an ephemeral host plant. ARTHURM. SHAPIRO, Division of Science and Engineering, Richmond College, 130 Stuyvesant Place, Staten Island, NY 10301. DESCRIPTORS: Pieris virginiensis; photoperiodism; diapause; polyphenism; niche; specialization; phenology.

19 citations

Journal ArticleDOI
TL;DR: The results showed the importance of vertical and horizontal action on natural mortality factors in tomato crops, and the critical stage for mortality was 3rd‐ and 4th‐instar larvae, being more vulnerable to natural control factors.
Abstract: The seasonal variation in natural mortality of phytophagous insects is determined by the relative importance of biotic and abiotic factors in agroecosystems. Knowledge regarding these factors throughout the year represents a key concern for IPM programmes. Seasonal population fluctuations of tomato pinworm, Tuta absoluta, led to an investigation of its natural mortality factors during the rainy season when the population level is low and during the dry season when population peaks occur. The aim of this study was to verify the seasonal variation in T. absoluta mortality factors in tomato crops. Immature stages of T. absoluta were obtained from laboratory‐rearing in the laboratory. These were taken to the field and monitored over two years. The mortality causes for each stage of insect development from egg to adult were assessed daily. Multiple biotic and abiotic mortality factors affected the immature T. absoluta stages such as rainfall, physiological disturbances, diseases, parasitoids and predators. The key T. absoluta mortality factor during summer–spring was predation. In addition, larvae predation correlated positively with temperature, wind velocity, photoperiod and rainfall. Nevertheless, during winter–fall, the key mortality factor was parasitism. Therefore, the critical stage for mortality was 3rd‐ and 4th‐instar larvae, being more vulnerable to natural control factors. Finally, the results showed the importance of vertical and horizontal action on natural mortality factors.

19 citations

Journal ArticleDOI
TL;DR: The elm spanworm, Ennomos subsignarius (H¼bner), a polyphagous defoliator of hardwoods, has been in outbreak in the southern Appalachians since 1954 (Fedde 1964).
Abstract: The elm spanworm, Ennomos subsignarius (H¼bner), a polyphagous defoliator of hardwoods, has been in outbreak in the southern Appalachians since 1954 (Fedde 1964). Host trees in the outbreak area are the oaks, Quercns spp., and the hickories, Carya spp.

19 citations


Network Information
Related Topics (5)
Braconidae
3.6K papers, 62.5K citations
94% related
Instar
5.5K papers, 78.1K citations
93% related
Parasitoid
5K papers, 120.9K citations
93% related
Aphididae
5K papers, 92.1K citations
92% related
Weevil
6.4K papers, 71.8K citations
91% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20241
2023819
20221,918
2021212
2020271
2019279