Jhalendra Rijal

Integrated Pest Management (IPM) Advisor with the University of California. I do pest management research and educate growers about it. Tweets are mine.

[Jhalendra Rijal @IPMCorner]

We have a high incidence of flatheaded borer in walnuts. If you are interested in learning about "all things flatheaded borer IPM", consider joining the field meeting on November 21, 2024, in Stockton.
Register here: https://t.co/qF8vZ1MJcy
@grow_the_valley @UCCEStanislaus

[Jhalendra Rijal @IPMCorner]

Navel orangeworm egg laying activity in almonds has been going up - not surprising for given the high overwintering populations and the prevalence of mummy nuts out there. Keep track of what’s happening throughout the season is crucial. Numbers from Modesto area.

[Rep. Josh Harder @RepJoshHarder]

🚨 A new invasive beetle is going after our almonds and pistachios and farmers are waking up to find their crops eaten away.

I’m pushing the @USDA for an emergency response to nip this in the bud before these pests cause real damage and hurt our economy.
https://t.co/3NvrsKQ0bo

[Jhalendra Rijal @IPMCorner]

The UCCE-Quad County Walnut meeting is this Friday, February 2, at the Ag Center in Stockton. See the agenda below. Please RSVP using this link: https://t.co/9dwf3aZnzt @grow_the_valley @ucanr @UCEastBayCrops @CaWalnuts @UCCEStanislaus

[Jhalendra Rijal @IPMCorner]

@JoeDelBosque Yes. Unfortunately, this is another terrible pest that directly attacks almond nutmeat.

[Jhalendra Rijal @IPMCorner]

@KStateEntom @SabitaRanabhat1 @morrisonlabUSDA Congratulations!

[Pam Kan-Rice @UCANRpam]

A new beetle that attacks nuts has been confirmed in Stanislaus, Merced, Madera and Kings counties.
“It has likely been here for a few years based on the damage we’ve seen," @IPMCorner tells @ToddFitchette https://t.co/QlDYMll00H

[Ag&Natural Resources @ucanr]

As a result of climate change, #CA's farms are expected to face a surge in #ag pests, which poses a threat to the state's specialty crops industry. UC researchers will help develop a holistic climate-smart pest management strategy to build resilience. https://t.co/9JIu2R5nEk

[Jhalendra Rijal @IPMCorner]

We had a fun this morning talking with future scientists at San Joaquin County AgVenture in Manteca. Proud of my team for organizing the amazing booth, @sama_sakaki, Mahesh Ghimire, Chang Vue, and volunteer Rebekah. Over 3000 kids attended the event @ucanr @UCCEStanislaus @UCIPM

[Jhalendra Rijal @IPMCorner]

@UCANRpam @UCANRpam, you are overthinking it 😄 we use window screen to glue almonds to create portable nut strands. We can put these out in the field treated with insecticide and untreated control. NOW natural population infests them. and we compare infestation rates among treatments.

[Jhalendra Rijal @IPMCorner]

Today’s work setup!
Doing Navel Orangeworm trial with biological and reduced-risk insecticides using these almond strands.

[UCCE Stanislaus County @UCCEStanislaus]

Stanislaus County 4-H is nominated in the “nonprofit organization” category for The Modesto Bee’s “Best in Modesto” contest.
Click: Services, Nonprofit Organization, Stanislaus County 4-H, Review and cast my ballot, Submit ballot and vote again tomorrow!
https://t.co/TdbwffaLpZ

[Jhalendra Rijal @IPMCorner]

@jen_l_espinoza They are immature stages of the False Chinch bug. They tend to aggregate in the area near the homes and sometimes in plants nearby, especially when the vegetation they feed on dries out. More info here: https://t.co/j2k4XDGKG4

[Jhalendra Rijal @IPMCorner]

Latest on flight and projected generation timing of navel orangeworm, Amyelois transitella - a notorious pest of tree nuts in California (Calculations are based on Modesto area weather/trap counts) @SJVtandv @UCCEStanislaus @SacOrchards @UCIPM

[Jhalendra Rijal @IPMCorner]

Navel orangeworm counts are going up. When there are “hullsplit” almonds which release volatiles that is attractive to gravid NOW females for egg laying. Both NOW activity and hullsplit progression are two critical factors to time insecticide spray effectively. @ucanr @UCIPM

[Jhalendra Rijal @IPMCorner]

@Govinda26432067 Yes. Prionus beetle, https://t.co/vfr3yakuQJ

[Jhalendra Rijal @IPMCorner]

This week, we have seen increased navel orangeworm counts (Fig. 1; e.g., ~38.6 eggs/trap/week, Modesto area). This increase occurred after 1000 degree-days from the spring egg-laying biofix (i.e., 26 April). From now on, it is critical to closely monitor…https://t.co/cEtFSk1Hh0

[Jhalendra Rijal @IPMCorner]

Applying entomopathogenic nematodes for flatheaded borer, Chrysobothris mali, in walnuts. This pest has been damaging several walnut orchards each specially when trees are little stressed, sunburn, and may not have best growth. You may not detect the stress level visually!@ucanr

[Jhalendra Rijal @IPMCorner]

Our last IPM breakfast meeting-8th one, for this year. Dr. Robert VanSteenwyk is delivering a talk on husk fly. Thanks to all participants, 35-55 attendees per meeting. Very happy with the support from the growers, PCAs, and industry. See you in the next March. @UCIPM @ucanr

[Jhalendra Rijal @IPMCorner]

@JoeDelBosque @moniquejrivera It’s an advanced nymphal stage of Say stink bug or Chlorochroa. They are polyphagous. We found them in almond/pistachio orchards occasionally. They are not green stink bugs mwhich is much bigger problem in nut orchards.