Tag: "weevil" at biology news
Peas With Built-In Weevil Resistance
...cally modified peas are 99.5 per cent resistant to weevil
attack - no insecticide required," says Dr TJ Hig...t blocks the normal digestion of seed contents by weevil
larvae, so they don't grow and develop into adults," Dr Higgins says. "Weevils can reduce yields...
Natural repellant in Spanish cedar leaves could help tropical forests
...rs, as well as the insectexamined in this study, a weevil
known as Exopthalus jekelianus. Ifplantation-raised timber production does not succeed already endangered primaryforests are threatened even further, the scientists note. "The four compounds we identified are new to science," said Philip C. Stevenson...
Striking back at biological invaders
...ported and released to subduethe invader, like the weevil
brought in to take on the tumbleweed in the westernUnited States. A third news story reports on the increasing demand forbiocontrol and why some scientists are worried that these new recruits will alsorun wild and compound the existing problem. Scie...
Chemical discovered that causes plant tumors
...sect pests of peas. In order to reproduce, the pea weevil
needs to lay its eggs on a pea pod. But the pea pl... the egg is laid, the pea plant detects in the pea weevil
a type of chemical, which the Oregon researchers identified and are calling bruchins, in reference t...
Biocontrol backfires again
...ber of "exceptions" keeps growing. The latest is a weevil
intended to control a non-native thistle. New research shows that the weevil
prefers a native thistle and can reduce its seed set by 98%. "Ecological risk was severely underest...
Palm leaves act like flowers
...anean coasts, attracts its specialised pollinating weevil
in a very surprising way. In this palm, flowers produce no odour and are not visually distinguishable at long distance. However, during the flowering season, the palm's leaves produce a specific fragrance, with typical floral notes. The researchers ...
Special section: Invasive species
...in the field. For instance, a European seed-eating weevil
was predicted to prefer the invasive Canada thistle but ended up preferring the native Tracy's thistle in Colorado. There are few, if any, options for addressing biocontrol gone amok. "'Recall' of problematic species from ecosystems where they are da...