Armyworms and cover crops

first_imgShare Facebook Twitter Google + LinkedIn Pinterest True armyworm (Pseudaletia unipuncta) overwinters in the southern U.S. and adult moths migrate northward in April and May.  Females lay eggs in grassy fields including rye cover crops, and the young caterpillars feed there, typically attacking corn from early may through June.  Corn planted into rye cover is at greater risk for early season armyworm feeding because the caterpillars may already be in the field and move to the corn after the rye is killed.  Armyworm can also move into corn from other fields such as wheat, in which case infestation usually occurs along field edges. Though some growers include an insecticide in their rye burndown herbicide, this prophylactic application is not recommended because in many years the armyworm populations will not be sufficient to warrant it or its cost.  Foliar insecticides work well as a rescue treatment and can be applied in years when scouting indicates it will help.  Corn fields planted into rye cover or into other no-till grassy habitats should be scouted beginning in early to mid May in southern Ohio and mid to late May moving further north.Armyworms take shelter during the day in corn whorls or under debris so it can be difficult to find them.  Their feeding damage is more obvious, with ragged edges that progress towards the midrib.  When 15 to 20% of the stand has feeding damage the field should be re-checked within a few days to determine if defoliation is increasing.  Rescue treatments in corn may be needed if stand infestation is greater than 50% and larvae are not yet mature. If defoliation remains less than 50% and the new growth shows minimal feeding injury, the stand will likely recover with minimal impact on yield.  Early scouting is important because the caterpillars are easier to kill when small, and also because larvae nearing maturity have already done most of their feeding.A number of labeled insecticides are available for armyworm (http://www.oardc.ohio-state.edu/ag/images/Corn_2013_ArW.pdf), and certain Bt trait packages are also labeled for true armyworm control (http://www.msuent.com/assets/pdf/28BtTraitTable2016.pdf).last_img read more

Western bean cutworm issues

first_imgShare Facebook Twitter Google + LinkedIn Pinterest Reports of ear feeding by western bean cutworm (WBC) have come in at a steady pace over the last few weeks. This is the third consecutive year that we have seen a fair amount of feeding, some of it likely has led to an economic loss. The heaviest feeding has occurred in the Northwest and Northeast corners of Ohio.While it is too late to spray or control at this point (since most larvae are protected in the ear and are getting ready to pupate anyway), growers may need to watch for the development of ear rots. WBC can leave entry or exit holes in the corn husk, which can then provide a nice wound for pathogens like Fusarium and Gibberella.  Some of these organisms can then be a further source for mycotoxins, including Fumonisins and deoxynivalenol, AKA vomitoxin.In some cases, damaged kernels will likely be colonized by opportunistic molds, meaning that the mold-causing fungi are just there because they gain easy access to the grain. However, in other cases, damaged ears may be colonized by fungi such as Fusarium, Gibberella and Aspergillus that produce harmful mycotoxins. Some molds that are associated with mycotoxins are easy to detect based on the color of the damaged areas. For instance reddish or pinkish molds are often cause by Gibberella zeae, a fungus know to be associated with several toxins, including vomitoxin. On the other hand, greenish molds may be caused by Aspergillus, which is known to be associated with aflatoxins, but not all green molds are caused by Aspergillus. The same can be said for whitish mold growth, some, but not all are caused by mycotoxin-producing fungi.So, since it is not always easy to tell which mold is associated with which fungus or which fungus produces mycotoxins, the safe thing to do is to avoid feeding moldy grain to livestock. Mycotoxins are harmful to animals — some animals are more sensitive to vomitoxin while others are more sensitive to Fumonisins, but it is quite possible for multiple toxins to be present in those damaged ears. If you have damaged ears and moldy grain, get it tested for mycotoxins before feeding to livestock, and if you absolutely have to use moldy grain, make sure it does not make up more than the recommended limit for the toxin detected and the animal being fed.last_img read more

BJP State executive to meet in Pimpri

first_imgPune: The Bharatiya Janata Party will hold a two-day meet of the State executive at Pimpri on Wednesday. This will be the party’s second executive in Pimpri after more than three decades, the first being in the early 1980s.“The venue has been chosen as a symbolic marker of our triumph over the NCP, which had dominated the PCMC [Pimpri-Chinchwad Municipal Corporation] for so long,” a BJP leader said. The saffron party won unprecedented landslides in polls to both Pune and Pimpri-Chinchwad civic bodies, bagging 98 out of 162 seats in the Pune Municipal Corporation and 77 out of 128 seats in the PCMC.The BJP’s top brass from Maharashtra, including Chief Minister Devendra Fadnavis and the party’s State unit chief Raosaheb Danve are expected to be in attendance, along with Union Ministers Nitin Gadkari and Suresh Prabhu.The sessions will focus on policy-making in Maharashtra and the party’s plans after securing overwhelming victories in most of the civic bodies and local bodies across the State.There are speculations that Congress strongman Narayan Rane might formally enter the BJP’s fold during the meet. However, local party leaders refused to comment on the matter.BJP’s Pimpri-Chinchwad president Laxman Jagtap said the meet will be held at the Ramkrishna More auditorium, and will be attended by more than 500 party leaders.The party virtually had no presence in PCMC, be it the civic or Assembly level, until the 2014 Parliamentary polls.However, its fortunes changed when Mr. Jagtap, who was formerly the NCP’s vital point man in the area, joined the BJP in 2014. This paved the way for the entry of more NCP heavyweights, like Bhosari legislator Mahesh Landge and former PCMC mayor Azam Pansare, into the saffron party.Stormy protests are expected by the Opposition NCP and the Shiv Sena, the BJP’s disgruntled ally, during the meet.The Sena’s Maruti Bhapkar (a former Aam Aadmi Party leader) said a combined Opposition would stage a hunger strike to protest against the failure of the promises made the BJP-led Central and State governments on various issues.last_img read more