WCN December 2019
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Continued from Page 12<br />
to minimize crop damage. A second<br />
shake of pollinator varieties should be<br />
done by early September to prevent a<br />
fourth flight of NOW and reduce overwintering<br />
numbers.<br />
Haviland said a case study showed<br />
that reducing mummy nuts to an<br />
average of two per tree paves the way<br />
for greater efficacy of mating disruption<br />
and insecticide sprays. Those two efforts<br />
can reduce crop damage by about 50<br />
percent. Sanitation reduces the odds<br />
that survivors will mate and find suitable<br />
places to lay eggs.<br />
“The farther separated they<br />
start, the easier to keep them apart,”<br />
Haviland said.<br />
The case study showed that when<br />
Nonpareils are harvested by early<br />
August, worms are removed from the<br />
orchard and the third flight of this<br />
insect is negligible, providing protection<br />
of later harvested pollinator varieties.<br />
When Nonpareils are harvested<br />
later in August, the worms become the<br />
third flight of adults, re-infesting the<br />
Nonpareils and infesting the pollinator<br />
varieties.<br />
Results of a University of California<br />
(UC) West Side Research and Education<br />
Center IPM study showed that one<br />
timed application of an insecticide<br />
reduced NOW damage by 50 percent<br />
where mating disruption was used. Data<br />
also showed consistent reduction in<br />
moths captured and crop damage where<br />
mating disruption was used.<br />
Reduction in the number of insecticide<br />
applications is important because<br />
of resistance issues. The two most<br />
widely used insecticide products are<br />
Intrepid and Alticor, and Haviland<br />
noted that there are no new chemistries<br />
for control being developed. Pyrethroid<br />
use is no better with resistance and also<br />
can lead to mite flare-ups.<br />
Continued on Page 16<br />
"Results of a University<br />
of California (UC) West<br />
Side Research and<br />
Education Center IPM<br />
study showed that one<br />
timed application of<br />
an insecticide reduced<br />
NOW damage by 50<br />
percent where mating<br />
disruption was used."<br />
The Future<br />
of Mating<br />
Disruption<br />
is NOW<br />
Remote-controlled camera traps and dispensers<br />
Unique variable rate pheromone application<br />
Installation, monitoring, and maintenance included<br />
New for 2020: Water management & per acre<br />
hull split prediction tools<br />
Call us at<br />
1.855.924.3282<br />
or email us at:<br />
info@semios.com<br />
semios.com<br />
A full-service solution of sensors and controls to monitor and<br />
manage pests, weather, disease risk, and soil moisture.<br />
14<br />
West Coast Nut <strong>December</strong> <strong>2019</strong>
Change language