Plant Diseases/spray


Hi have not sprayed anything on my apples since dormant,now its flower time.what should i spray on petal fall to strengthen remaining apples as here we are experiencing cold temperature for apples.can i spray gibbleric acid on petal fall or else.

Dear Vivek, At petal fall you should spray with sulfur and BT to help control pests and diseases, and then spray again 7-10 days later.  You can also begin weekly kaolin clay spraying at this time.  As soon as the fruit sets, spray with sulfur spray or Bordeaux if you have signs of disease and then spray every 14 days as the fruit develops.  Also at fruit set, you can spray with pyrethrum or other organic insecticide for pests, and spray that every 14 days as well.  Be sure to stop spraying 30 days before the expected harvest. I hope this information helps, but write back if you have more question.  I'm sorry for the late response.  I am answering your other question now.  Good luck, Melissa  

Plant Diseases

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Melissa Johnston


Plant diseases, landscaping, tropical plants, roses, herbs, plant care, grafting, horticulture, plant identification, anything about plants I can likely answer.


35 years experience in various plant businesses, 1984 Certified Texas Master Gardener.

Master Gardener Association of Texas charter member

none as of yet, but I have a plant q&a book I am in process of submitting.

Magna cum laude graduate of Texas A&M, 1978

Awards and Honors
Plant growing awards, highest grade for Texas Master Gardener graduates.

Past/Present Clients
Past member of and was very highly rated. Owned landscape company in the past, Almost Paradise, and was very successful despite little equipment, no help, and no advertising. Lived well for two years until 9/11.

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