Development and demographic parameters of Fall Armyworm (Spodoptera frugiperda J.E. Smith) when feeding on rice (Oryza sativa)

Timothy Joseph Krupnik (2023)

Fall Armyworm (FAW), Spodoptera frugiperda (Lepidoptera: Noctuidae), native to the Americas, is a polyphagous insect pest feeding on more than 350 plant species. We studied the developmental and demographic parameters of the maize (Zea mays) strain of FAW on rice (Oryza sativa), and compared the results with its prime host, maize. The developmental period from egg to adult among rice varieties did not differ significantly; however, it did differ significantly between rice and maize, as feeding on rice rather than maize extends development duration of FAW larvae by 15.15%. FAW larvae collected and reared on maize were found to be of significantly higher weight than those reared on rice at two sequential dates of their development; pupal weight however was observed as statistically similar between these two host crops. Regardless of the host, female adults always emerged before males; in maize, female FAW appeared 3.36 days earlier than males. Females derived from rice had longer pre-oviposition periods and shorter oviposition ones than those derived from maize. In rice and maize, the age-specific fecundity rate (mx) peaked at 40 days and 33 days, respectively. When the Fall Armyworm consumed maize instead of rice, there was an increase in the reproduction rate (R 0), the intrinsic rate of natural increase (rm), and the finite rate of increase (λ). For instance, when FAW fed on rice, the rm value was 0.121, whereas it rose to 0.173 when FAW fed on maize. Feeding on rice instead of maize resulted in significantly longer mean length of generation (tG) and doubling time (tD) for the fall armyworm (FAW). This suggests that it took a longer time for the FAW population to double when it was fed rice under controlled greenhouse conditions. In summary, our research suggests that FAW can survive and complete its life cycle on rice plants and on multiple varieties of rice in Bangladesh. However, field verification is necessary before drawing strong conclusions as to the risk posed by FAW in rice. This requires additional studies of FAW and associated insect community dynamics under non-controlled conditions and in the context of multi-species interactions in Asian rice fields.

Article

Invasive Pest Life Table Parameters CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA HOST PLANTS PESTS RICE SPODOPTERA FRUGIPERDA FALL ARMYWORMS

Commodity crops in biodiversity-rich production landscapes: Friends or foes? The example of cotton in the Mid Zambezi Valley, Zimbabwe

Frédéric Baudron Ken Giller (2022)

Article

Land Sparing Land Sharing Human-Wildlife Conflicts CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA BIODIVERSITY HOUSEHOLD SURVEYS LAND COVER LANDSCAPE MAMMALS CASH CROPS HUMAN-WILDLIFE RELATIONS LAND USE CHANGE

Introgresión del gen de resistencia a la roya del tallo Sr 47 en la variedad de trigo cirno C2008

JULIO HUERTA_ESPINO Susanne Dreisigacker (2023)

Article

CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA AEGILOPS SPELTOIDES PUCCINIA GRAMINIS TRITICUM TURGIDUM STEM RUST

QTL mapping for pre-harvest sprouting in a recombinant inbred line population of elite wheat varieties Zhongmai 578 and Jimai 22

Ming Li Shuanghe Cao xianchun xia Zhonghu He Yong Zhang (2023)

Article

KASP Markers CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA PREHARVEST SPROUTING GERMINATION INDEX QUANTITATIVE TRAIT LOCI WHEAT

Rust research to enhance resistance durability

sridhar bhavani (2022)

Conference object

CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA RUSTS DISEASE RESISTANCE SPRING WHEAT GENETIC DIVERSITY (AS RESOURCE) ADULT PLANT RESISTANCE

Rust research to enhance resistance durability

sridhar bhavani (2023)

Conference object

CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA RUSTS DISEASE RESISTANCE SPRING WHEAT GENETIC DIVERSITY (AS RESOURCE) ADULT PLANT RESISTANCE

Dead level contour technical design parameters required for sustainable crop production in semiarid areas of Zimbabwe

Menas Wuta Isaiah Nyagumbo (2021)

Article

CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA MAIZE DRY SPELLS RAINWATER HARVESTING CROP PRODUCTION TECHNOLOGY

Diluted density. Urban planning in the Monterrey Metropolitan Area

Sheila Ferniza Quiroz Jesús Manuel Fitch Osuna (2021)

The Monterrey Metropolitan Area (mma) in Northern Mexico has had an expansive and dispersed growth in recent decades. In 35 years, the city doubled its population and grew 8 times in territory (Secretariat for Sustainable Development, 2020). As a mitigation measure and with the objective of repopulating the areas within the city, urban regulations have been promoted that allow higher density and building potentials in some municipalities; however, the efforts are isolated and without metropolitan coordination. What are the urban regulation guidelines in the municipalities of the mma? How dense are its municipalities? Where are located the densest areas of the city? The objective of this research is to establish the current state of local regulation regarding urban development and to map the housing density to identify the locations with the lowest and highest density at the mma. The gross density at the Ageb scale is mapped for the 18 municipalities of the mma through the QGis software; data from the Inegi 2020 National Population and Housing Census is used. It is found that the peripheral municipalities of recent incorporation to the mma, unlike those of greater urbanization, lack urban development plans, and that most of the municipalities do not have updated regulations based on the current laws. The areas with the highest density are located in the peripheral municipalities, associated with the construction of low-income mass housing, and those with the lowest density in interior municipalities in areas of higher socioeconomic status, diluting the small efforts of densification in the city.

Article

Artículo

density urban sprawl urban planning densidad expansión urbana planeación urbana HUMANIDADES Y CIENCIAS DE LA CONDUCTA HUMANIDADES Y CIENCIAS DE LA CONDUCTA

Visualising the pattern of long-term genotype performance by leveraging a genomic prediction model

Vivi Arief Ian Delacy Thomas Payne Kaye Basford (2022)

Article

Factor Analytic Genotype-By-Year Historical Data Relationship Matrix CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA GENOTYPES PLANT BREEDING SPRING WHEAT RESEARCH

Variation in anther extrusion and its impact on fusarium head blight and deoxynivalenol content in oat (Avena sativa L.)

Xinyao He (2020)

Article

Anther Extrusion Anther Retention Deoxynivalenol Fusarium Head Blight Spray Inoculation Spawn Inoculation CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA VOMITOXIN INOCULATION ANTHERS FUSARIUM