Sugarcane Stemborers and Their Parasites in Southern Texas

Effects of Age and Host Number on Reproductive Biology ofAllorhogas pyralophagus(Hymenoptera: Braconidae) Attacking the Mexican Rice Borer (Lepidoptera: Pyralidae)

“…However, complete control was deemed unlikely because the parasitoid could not penetrate deep into the sugarcane stalks. Continued recovery of the parasitoid, albeit at low levels, indicates establishment (Legaspi et al 1997, Meagher et al 1998. Additionally, A. pyralophagus has been considered for control of other stalkboring lepidopterous pests of graminaceous crops (Melton and Browning 1986).…”

“…Growers do not treat sugarcane with insecticides, because these are largely perceived as ineffective and uneconomical. To mitigate losses, Ͼ20 parasitoid species have been released as biological control agents against E. loftini since 1982 (Legaspi et al 1997), but current seasonal parasitism levels are only Ϸ6% (Meagher et al 1998). Smith et al (1987) released over 2 million Allorhogas pyralophagus Marsh imported from Mexico, and reported consistent recoveries, even after December freezes.…”

Effects of GNA Transgenic Sugarcane on Life History Parameters of <I>Parallorhogas pyralophagus</I> (Marsh) (Hymenoptera: Braconidae), a Parasitoid of Mexican Rice Borer

“…Transgenic sugarcane expressing GNA was developed at the Texas Agricultural Experiment Station, Weslaco, TX, for use against the Mexican rice borer Eoreuma loftini Dyar (Lepidoptera: Pyralidae) (Irvine and Mirkov 1997). Eoreuma loftini is the primary pest of sugarcane in southern Texas, and its migration along the Gulf Coast threatens other gramineous crops such as maize, rice, sorghum, wheat, and forage grasses throughout the southern United States (Legaspi et al 1997, Meagher et al 1998. Successful biological control of E. loftini has not been achieved despite the release of a number of exotic parasitoid species since the early 1980s.…”

“…Successful biological control of E. loftini has not been achieved despite the release of a number of exotic parasitoid species since the early 1980s. Parallorhogas pyralophagus (Marsh) (Hymenoptera: Braconidae) is the predominant parasitoid among those exploiting E. loftini in southern Texas (Meagher et al 1998). Parallorhogas pyralophagus is a gregarious, idiobiont ectoparasitoid imported from Mexico in 1981 (Melton andBrowning 1986, Smith et al 1987).…”

Controle da broca da cana-de-açúcar Diatraea saccharalis (Fabricius, 1794) (Lepidoptera: Crambidae) através de isca tóxica

“…Em estudos com D. saccharalis, tem sido identificado insetos como importante predador de ovos e larvas (NEGM; HENSLEY, 1969;HENSLEY, 1971;CUEVA, 1980;MEAGHER et al, 1998;FOWLER, 2000). Doru luteipes é um importante predador de estágios imaturos de D. saccharalis, principalmente ovos (BATALLA'N et al, 2004 apud FENOGLIO;TRUMPER, 2007).…”